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Diatoms are monocellular organisms which contain chlorophyll, and manufacture their own food in the same manner as plants, through the process of photosynthesis. They are one of the major producers of the Earth's oxygen. Their long geological history makes them very useful in the correlation of sedimentary rocks, and they are of equal value in reconstructing paleoenvironments. They are remarkably common everywhere there is any water at all! I have studied fossil marine diatoms for many years, as they are my primary interest in the microfossil world. Many of them are quite beautiful, and they are a favorite subject with many persons who enjoy photomicrography. My primary interest is in diatom taxonomy and evolution, not photography, so I'm afraid my images don't really do them justice. Centric diatoms exhibit radial symmetry, from circular to triangular, and all points between. Oval shapes are not uncommon.
The oldest specimens of essentially modern diatom types are from the Cretaceous, and one of the very best localities is the Moreno Shale, which crops out in the Panoche Hills of California. Many diatomists have worked on this flora, and it is fairly well understood. Here we see two of the common taxa from this source. (The bar across the top of the Azpeitiopsis is a sponge spicule, not part of the diatom!) Diatom frustules are composed of secreted silica -- hence they are brittle, but can be virtually indestructible by chemical or diagenetic change in the right sort of environment. (One exception is a highly alkaline environment, which corrodes and ultimately dissolves biogenetic silica.) Other siliceous microfossils include some types of sponge spicules, silicoflagellates (another blog entry coming up perhaps), radiolarians, and ebrideans. At least one family of the foraminifera uses siliceous cement to form their tests.
Diatom floras changed radically across the KT boundary, but they are still abundant in the Paleocene. Arguably the world's most famous locality for fossil diatoms is the region around Oamaru, New Zealand, and all collectors have many specimens from there. The age is Late Eocene - Early Oligocene. Somewhat earlier are the many great localities in Russia. Here is a Paleocene specimen from Simbirsk, Ulyanovskaya, Russia. Note that it deviates from pure centric form in that it is slightly ovoid.
My own specialty is the diatoms of the Miocene. The United States is blessed with superb Miocene localities on both coasts, many well-known to members of this forum, because most of them can also produce superb shark teeth. The earliest known Miocene flora in the US comes from sites in Maryland: near Dunkirk, Nottingham, and other lesser known localities along the Patuxent River. All of these sites began to be explored in the mid-19th Century, because the diatoms are so perfectly preserved, to say nothing of abundant! These sites are in the lowest part of the Calvert Formation; indeed, there is an unconformity above them that lasted for a considerable period of time, and the diatom flora exhibits considerable changes across it. This part of the Miocene section belongs to the Burdigalian Stage, and age-equivalent diatoms are found also in bore holes and artesian wells at Atlantic City, New Jersey. An index fossil for the East Coast Burdigalian is the following taxon:
This species of Actinoptychus evolved relatively quickly, and became extinct at the end of the Burdigalian. It is remarkably beautiful under the microscope, especially in color images, as fine structures in the silica serve as diffraction gratings. I regret that I have no color image in my photo library: I need to make a few! The Calvert Cliffs are rich in fossil diatoms, also, from the later, Middle Miocene.
The above is but one example of the many marvelous specimens that can be found in the Calvert. If you're walking the beach for shark teeth, and have access to a microscope such as that used in microbiology or pathology labs, or even the type used in high school biology labs, grab a sample of the sediment. Soak it in water until it disaggregates into mud, let it settle until the water is just a bit cloudy, and put a drop on a microscope slide with a coverslip. A magnification of 100X should reveal diatom frustules (or fragments thereof) among the remaining, unsettled particles of silt. Diatomists all have their own protocols to get such specimens almost perfectly clean, and permanent slides made with a mountant of high refractive index can be utterly gorgeous.
I am currently working most intensely on samples from the somewhat later Choptank Formation, that outcrops at Richmond, Virginia. This is another locality that produces excellent specimens:
This is one of the most enduring taxa in the geological record, appearing from the early Paleogene right up until the present day, and it can be very abundant.
A common triangular form. There are many genera of triangular centric diatoms. And other radial shapes are possible, too:
So far as I am aware, this unique specimen is the earliest known example of this taxon, which is still found today in tropical waters. The breakage in the top "arm" is unfortunate, but what can I say: the specimen is, thus far, unique. One might expect modern contamination of the sample, were it not for the fact that the Richmond localities occur far from the contemporary ocean coast -- they are not "watered" by modern waves!
That's it -- the 3.95 MB limit..............................
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Sunday, 12/18/2016, will be a day documented with great detail in my personal memory bank. As you read this, keep in mind, I am one of those people who remain in constant awe of the world around me; curiously exploring every little detail, often finding excitement in the things most would consider average or common. Every Trip I’ve made to Greens Mill Run these past three years has been one of such joy, excitement and inspiration – regardless of what treasures (and junk) I had found or imagined to find.
12/18/16 9:15 AM – I arrive to my usual parking spot, which I frequent most weekends and week day evenings through the spring summer months that the sun lasts long enough to get a few screens in after getting off work at 5pm. I am seriously addicted and will never be ashamed to admit it! ( of course, I miss the occasional weekend to go on fossil trips with groups in other places OR because of lil pesky hurricanes, like Matthew, flooding me out). Rain, cold, heat nor physical discomfort can keep me from going at least one day out of a weekend to get my dig on, and most of all – to find my peace of mind within the tiny spot of nature found near the heart of a small city.
I meet up with my favorite digging friend, Rick – who was in shock of the damage the city did along GMR to clear out the fallen trees within the creek. They had been clearing a wide road to fit a back hoe an extensive distance deep into the woods, just beside the stream, to remove the multitude of fallen trees left behind by Matthew. While they may have destroyed the beauty and protection of the banks – I do owe them some thanks for breaking up a couple banks in the process, releasing treasures!
We poked around and walked up stream slowly, heading towards I place we both wanted to hit up, a spot I didn’t have time to get into last weekend. I knew there were still things to be found - I had spent about 20 hours total there two weekends ago and still kept finding stuff. Within the week days since the weekend prior, they removed the fallen tree I wanted to dig by, pulling it up out of the stream. As I walked up, looking over the damaged bank and released potential, I look to my right (at 10:00 am) and cannot post here the exact words that came out of my mouth – but I will elude to it .. “Holy…” and Rick, right behind me, immediately sees what I’m looking at, exclaiming “I .... hate you” jokingly.
I wouldn’t have believed it and neither would he had one of us came upon this discovery alone. Laying there in the clear water, glistening in the sun as it rested on hardened clay, was my very first complete, serrated and large Megladon tooth. She is a true beauty. We snapped photos in the water, where she lay, and then in hand – texting them to a couple people, bragging etc – it being quite "the find". It only took about 3 years of consistent trips to finally find my very own GMR meg in remarkable condition of such size!!
I kept digging. I found an AMAZING great white two hours later and a few smaller GW, Mako, Crow, tiger etc that are common for GMR (but still exciting to me each and every time I see one in my screen!).
Leaving around 2 pm, the love story of Mr. Ash and his first remarkable Meg followed.
We went home, I had a shower and my Meg had a bubble bath (I’m mildly OCD and have to disinfect everything I bring home).
Then, we went out for dinner, my Meg and I (oh and the GF) to celebrate! I wanted steak – we went to Ribeyes (AMAZING STEAK FYI). I got us a salad, but Meg said she doesn’t eat rabbit food and would wait for the main course.
Meg was a bit testy with the cook when they informed her that they do not serve Whale, but we settled on a nice medium ribeye.
Julie, my lovely lady with such kind heart-ed tolerance for my fossil obsession, drove us into the sunset, my meg and I – hand in..tooth…holding it..erm – to get a milk shake from Arbys.
We ordered some chocolate shake goodness and we headed home!
True love. (my GF getting slightly jealous at this point as I never share my shakes with her)
And finally, after such a long exciting day – we got tucked in for a good night’s rest before meeting all of my coworkers the following morning.
Any fossil lover can relate to the pure excitement and euphoria of their first meg find. I hope you can appreciate the visual representation of what loving a Meg, found after searching for so long, would be like J
Toby (my 10yo son) and I at the site for a group #BlackFriday #Fossil hunt #optoutside #outddoorresearch, Nov 25, 2016
There's a particular creek/ditch site my son and I like to frequent. It's not the easiest site and not always as productive as we'd like, but it's a good site nonetheless. I've been studying the stratigraphy to better
understand what could be there as I get to know the species of the fossils we find. We have found a number of things from micro shark teeth like tigers, to bigger items like rib bones and other bone frags, various
Partial whale/dolphin skull
vertebrae from sharks and fish, marine mammal teeth and bones, and more. I've even consulted one of the paleontologists at the College of Charleston, where I'm studying to become a geologist. It appears to be Chandler Bridge and I'm looking into what is underneath it (what we walk on in the creek). It's super hard and I was told by more seasoned hunters yesterday it's likely either marl or limestone. This would be consistent with our finds and with the idea of a marine/estuarine environment. It would be interesting if the marl/limestone underneath is Ashley formation, though. That would mean we are a bit older in the timeline than thought. Chandler Bridge is late Oligocene (~23-24 mya) and Ashley is early Oligocene (~26.5-30 mya). The top section of the site has a lot of artificial fill, however, so there is no telling where it comes from. After storms I have found a huge mako and huge Angustidens tangled in the roots only a foot or two from the surface so it had to be artificial fill.
However, lately when we go we've seen something pretty horrible going on.
Normally, the fossil hunters we encounter are good, honest folks. They are hunting for personal collections or to make some money and are pretty good about taking care of the sites they hunt at. After all, if we do not take care of these sites, they will be destroyed and stop producing fossils. There's the logos of the matter, right? There is also the logic that if we destroy sites, that are public lands, those that administer and care for them can shut us out, much like the town of Summerville was compelled to do. It is my understanding that some fossil hunters were so - um, "enthusiastic", shall we say - about their hunts, that they were digging into banks (which I usually refer as creek and ditch walls as many are very steep and deep) that they were breaching private property lines and risking other people's properties. So basically, just take care of the sites and they will take care of you. Makes sense, right?
Well, guess what, folks - it's happening here.
One of the several dig outs I found
Looking for micros despite the fall
When I first went to this site in about Aug/Sept of 2015, I had spied it on Google maps as a new fossil hunter (and am still quite the novice). Another experienced hunter told me it had promise but was a site he didn't like to go to for various reasons. I decided to give it a go. I went alone as I tend to do when checking out a new place I'm unfamiliar with. I'd rather not have my child with me in such a scenario. When I arrived, I walked to the edge of the creek bank and my use of the word "wall" couldn't be more appropriate. It was a nearly 90 degree vertical 15-20 foot wall to the bottom. I found a spot with what I thought to be some decent hand and foot holds and started my climb down. However, when I put my full weight on the foot holds, the wall gave out and fell straight to the bottom. I was pretty scraped up from the thorny flora overgrown on the wall but didn't break any bones, so I went ahead and did my little fossil hunt for a couple of hours only coming up with some micro shark teeth. I would later learn that I had a blown disc in my neck. See, I already had one fusion in my neck about four years prior to this and apparently a disc below that fusion had herniated. I suspect, though admit it is only conjecture, that this fall caused the disc to give out because I began to have symptoms just after this fall. While conducting my hunt on this particular trip out, I saw that people had been digging into the bottom of the wall and wondered if I had been climbing above such a spot, which caused it to give out when I tried to climb on it.
It was some time before I returned to that site, in part due to the fact that I was diagnosed with that blown disc and required surgery in December 2015 to fuse more vertebrae. It was disheartening. I can only have one more fusion and I'm only 39 years old. It's depressing to think about. Therein lies my pathos. Many people have other various emotions tied to fossil hunting and how to go about it. I've found it to be a very charged subject, for sure.
Black Friday 2015 there was a group hunt. I was going to join them, however I had just received that diagnosis of a blown disc and didn't want to risk further injury. I gave the organizer of that hunt the location and warned about the difficulty I had getting to it. I had also let him know that there was a massive wash out in one part because of the "Thousand Year" flooding in October 2015 (I may write another blog on why that phrase was massively misused). Apparently, there were some really cool finds, or a really cool find there, so after my recovery, I went back. I went with my son and it was overall uneventful - no falls thankfully.
Angustidens teeth I found that day
I did find a nice Angy (and a second at another site) but then we only found a couple of micros. We met and conversed with a seasoned hunter that IIRC was there with a group he brought on a hunt tour. There was a lot of digging but nothing that seemed very destructive and certainly nothing that was undermining the slopes that would cause them to fail. We chatted and I learned a few things. It's always nice to talk to people that have been doing this for so long.
Angustidens teeth I found that day
Later, in I believe April 2016, I took a friend of mine on his first fossil hunt and he killed it! The Odontoceti tooth and the rib bone above were among some of what he found there that day. The water level was low compared to the previous times I had been there and he's pretty adventurous, so we went places at that site I had never been before. We also found a spot to climb out of and now, Toby and I use it to get into the creek. It's not steep at all and it's not as deep there either.
Well, I've only been twice since I started at CofC in August and that has been this month, November 2016. We've had some great finds, especially since the water is really, really low (we've had nearly no rain at all since Hurricane Matthew hit in October). However, the practices that are being used by one or more people at this site recently leave utter destruction. I'm not exaggerating when I say that either. It was so bad when we went yesterday for the group Black Friday Hunt that the creek was almost blocked off as both banks had been horribly undercut and the rubble nearly met in the middle of the creek.
This isn't a natural erosion process. This is clearly the work of a human or humans; you can clearly see the shovel marks in the bank. This is far worse than even the dig outs that I witnessed when I first was here that caused me to fall and blow a herniated disc last summer!
What may be another real kick in the pants is that this undercutting is not well understood by me as they are not sifting what they are leaving behind. We have even pulled micro tiger shark teeth out of the huge chunks of rubble they left behind. It's confusing and I don't understand it. I can only assume they are looking for very large teeth. The biggest I've found are 2-2.5 inch Angustidens. There are no megalodons that I've ever seen and Angies and Megs are not in the same time period. Angies lived in the Oligocene (appropriate for Chandler Bridge and Ashley formations) and megalodon lived during the Pliocene and Miocene Epochs. As far as I know, they did not overlap so there shouldn't be any megs here, especially if this is closer to the Ashley formation than I thought.
This undercutting is extremely destructive and dangerous! It will cause these slopes to fall and the banks will wash out again after we have heavy rains. Maybe that is what the person/people doing this hope to achieve? However there is a massive flaw in that thought process. Several, actually.
First off, it will cause other fossils to be lost. I get it, people want the big boys. They want 2-3 inch Angies, they want big whale teeth, they want full skulls - but by doing this, when it rains, when this slope fails and collapses, all the other fossils will be washed away, the likelihood of finding any "big boys" will still be slim, more sediment will be in the creek covering the fossils that are settling and being deposited by the water in the bottom of the creek (where we have found our great finds, by the way), and you are destroying the area.
This may very well get tools and digging banned everywhere we hunt. Then what? What will you do then? I hope you are reading this. I hope you are hearing what I am trying to say. I get you probably don't care for the environment as much as others but I hope you hear your bottom line shrinking. As the people that live there start to see this, they may very well go to their city and county councils and follow Summerville's model. Or they may go with what other area's outside the Lowcountry have done and ban hunting altogether. And that is sad. There are not enough paleontologists here to find all that needs to be found. Whether they are in people's personal collections, up for sale, or being donated to museums, it is far better that people are out finding fossils and bringing those bones to the light of day than for them to remain covered for the world to never see again.
Here comes the ethos: no matter your philosophy there should be the inclusion of proper care of the sites where you hunt. If you dig into the banks/walls of creeks and ditches, please consider slope failure in your process. Remember that other people use these places and a slope failure can harm, even kill people. There are massive crevasses in the slopes now and cracks appearing in the top where people walk and ride 4x4 vehicles. There may be service vehicles accessing this dirt road as well. This is extremely dangerous! Aside from that, destroying where you hunt will not provide better fossils. It will close off the site and keep fossils buried in the rubble that is left behind instead.
View from the top of the bank - you cannot even see the slope has been undercut
When you sift gravel, make sure live creatures such as fresh water claims and dragonfly nymphs are immediately returned to the water. After sifting, if you toss the gravel onto the bank, please return it to the water after you are done for the day. How can the gravel capture more fossils from the water if it's sitting on the banks?
Aside from those smaller creatures we have also encountered deer, snakes, and seen evidence of dogs, raccoons and other animals. Remember this is their home. Please, respect that. Destruction of their habitat will affect how they survive (such as relying more on going towards human homes for food sources). If we tread more lightly and leave their ecosystem in tact, they can keep their own food sources and shelters without needing to encroach on ours. And please, for those that don't understand, it's not necessary to kill a snake just because you see it. Snakes will prefer to escape so give it that chance to get away. You will be fine.
I know this has been a long read and people prefer short status updates instead. But this couldn't be condensed more. I'm a somewhat "wordy" person and am working on trying be more concise; however, this had several points of view. People fossil hunt for many different reasons and I hoped to appeal to everyone's points of view without making it sound like this is how all fossil hunters behave. We don't. This destruction is caused by one person or a very few number of people. But the rest of us need to make sure we are educating people about why this sort of destruction is unnecessary and uncalled for. I am not trying to be rude, "holier-than-thou", or trying to offer a lecture (though I clearly have). I just wish to inform. I hope that I have. Please feel free to share and comment. Thank you.
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Sorry it has been so long since I last posted. I have been so busy with school, family life, and lots of technical problems. But I finally was able to finish my video and I am so excited to share my work with all of you!
This video is about my latest fossil cleaning, It is my favorite trilobite to date! It is actually a complete body fossil, not just a shell, or a piece of one. I did learn a few new things this time. I had some trouble with this one because the air scribe I have is not not suited for microscopic fossils, which is what I am cleaning up. Because of this I ended up damaging my fossil. A technique I am trying is to find the edges of the fossil and clean them out before I clean out the middle of the fossil. I am doing this because the air abrasive is basically a s sand paper in air form. The top of this trilobite is quite detailed, if I cleaned up the detailed section first it would leave it open to be hit by unintentional air abrasive and thus damaging it. So I left the top to be done last. This seemed to work well. Which is pleasing. Watch and see how it all turned out!
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A topic early last year in the Fossil Forum asked “What are your goals for 2015”. My response in that discussion was a desire to collect from the Duplin Formation in South Carolina to expand upon the species list within my Pliocene Project. Although I did not have the opportunity to bring those specific goals to fruition, I did add significantly to that list with unplanned collecting trips to two sites exposing the Golden Gate Member of the Tamiami Formation containing a number of species not found within the Pinecrest Member further north. However more so than any other unit that I sampled in 2015, was the unexpected opportunity to collect from several localities exposing the Lower Pleistocene (Gelasian) Caloosahatchee Formation. As I have previously reported the Caloosahatchee contains a mostly tropical fauna containing many endemic mollusks which lived within the flooded Everglades Basin following a 200,000 year sea level regression marking the end of the Pliocene Epoch.
My previous collecting endeavors in the Caloosahatchee had been restricted to the western portion of the Everglades/Big Cypress region and the trip that I attended in January 2015 organized by the Conservancy of Southwest Florida followed that trend with a visit to a quarry in Charlotte County (Fig. 1). The mine contained massive spoil piles of shell rich material excavated years ago that had undergone heavy weathering. As a result the large well preserved gastropods which the Caloosahatchee is known for were lacking although the weathering did reveal many of the smaller species not commonly looked for by most collectors.
Figure 1. Locality 1039. Charlotte County, Florida.
Throughout last year I conversed with several forum members and messaging with Dozer Operator (Thanks Jonathan!) finally led to a collecting trip to the eastern half of the everglades. Unlike the incredibly hot trip with FossilDAWG and jehussey the previous week, Tropical Storm Erika was moving offshore of the Florida peninsula ensuring a wet but more bearable day in the field. Navigating heavy rain squalls with the use of Jonathan’s weather phone app, we were able to miss most of the precipitation and visited among others that day two sites exposing the Caloosahatchee Formation. The first in Martin County east of Lake Okeechobee contained primarily Caloosahatchee material with some overlying Middle Pleistocene Bermont Formation from which I was able to score examples of the larger mollusks that the Caloosahatchee is known for while Jonathan collected some interesting vertebrate material probably originating out of the Bermont (Fig. 2). The second stop further south in Palm Beach County contained equal amounts of Caloosahatchee and Bermont sediments (Fig. 3).
Figure 2. Locality 1045. Martin County, Florida.
Figure 3. Locality 499. Palm Beach County, Florida.
Figure 4. Some gastropods from the Caloosahatchee Formation of South Florida.
Both sites particularly the latter, demonstrate the difficulty in identifying fossils within the Florida Plio-Pleistocene. Each of the shell bearing units in South Florida contain endemic species found only within designated deposits, however as seen in my Tamiami Gallery a number of molluscan species survived into recent times as well as some which persisted past the Upper Pliocene but becoming extinct later prior to the Holocene. Adding to the confusion are non-peer reviewed works which have taxonomically split new species based upon the unit and/or geographical region placing much emphasis on slight phenotypic variation. In the list below, I have attempted to be as accurate as possible in assigning species that belong in the Caloosahatchee, however short of in-situ collection there could be species particularly those collected from locality 499 that could have originated from the Bermont Formation. In addition, the below list also is the first that I have produced using marine invertebrate taxonomy as presented by the World Register of Marine Species (WoRMS) . This includes bivalve taxonomy proposed by Carter et. al., 2011 and gastropod taxonomy from numerous researchers. As shown in the list, not all of the gastropod families have been assigned to specific Orders and are waiting further study and DNA analysis. I will be applying the same classification to my other Plio-Pleistocene faunal lists as I update them in future posts.
Caloosahatchee species list 040416.pdf
Joseph G. Carter, Cristian R. Altaba, Laurie C. Anderson, Rafael Araujo, Alexander S. Biakov, Arthur E. Bogan, David C. Campbell, Matthew Campbell, Chen Jin-hua, John C. W. Cope, Graciela Delvene, Henk H. Dijkstra, Fang Zong-jie, Ronald N. Gardner, Vera A. Gavrilova, Irina A. Goncharova, Peter J. Harries, Joseph H. Hartman, Michael Hautmann, Walter R. Hoeh, Jorgen Hylleberg, Jiang Bao-yu, Paul Johnston, Lisa Kirkendale, Karl Kleemann, Jens Koppka, Jiřź Kříž, Deusana Machado, Nikolaus Malchus, Ana Márquez-Aliaga, Jean-Pierre Masse, Christopher A. McRoberts, Peter U. Middelfart, Simon Mitchell, Lidiya A. Nevesskaja, Sacit Özer, John Pojeta Jr., Inga V. Polubotko, Jose Maria Pons, Sergey Popov, Teresa Sánchez, André F. Sartori, Robert W. Scott, Irina I. Sey, Javier H. Signorelli, Vladimir V. Silantiev, Peter W. Skelton, Thomas Steuber, J. Bruce Waterhouse, G. Lynn Wingard and Thomas Yancey. 2011. A Synoptical Classification of the Bivalvia (Mollusca). Paleontological Contributions (4):1-47. 2011
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Welcome to the first entry of my dino blog! I figured for the first entry I should do something exciting and personal to me, so I'm doing a face-off between my two favourite dinosaurs: masiakasaurus and noasaurus! These two dinos are roughly the same size and are the two smallest abelisaurids found so far. Before we get into the match-up, lets look at some stats and figures for the reptiles themselves.
First off we have masiakasaurus, a piscivorous dinosaur with long, outward jutting teeth designed to capture and make sure any fish caught can't escape. Its arms had to be strong in order for it to hold on to its wriggling and squirming prey, and it's fingers end with hooked claws that would latch onto any fish snatched from the riverbank. It was 5.6 feet long (2 metres) and definitely is a strong and deadly competitor.
Now we have noasaurus, an abelisaurid that closely resembles the maniraptorans, for the killing claw on nova's hands was originally thought to be based on it's foot, like a raptor. Noasaurus was an active hunter and could reach blisteringly fast speeds, presumably using similar hunting techniques to deinonychus and velociraptor- going for the soft, fleshy part throat of the animal. This abelisaur was 7.9 feet long (2.6 metres) and will definitely prove more than a match for masiakasaurus.
This fight would probably only happen if noasaurus' hunting grounds started to clash with the section of the river masiakasaurus hunts by. As rivers generate a large amount of noise, noasaurus would definitely gain the advantage as it snuck up on masiaka, who would be facing the river, searching for prey. Noasaurus' first move would presumably to lunge from behind onto masiakasaurus' neck, attempting to get a killing strike in with the claw on it's hand. This move would likely push them both into the river (dinosaurs are pretty dumb, so noasaurus wouldn't have planned for that to happen!) where masiakasaurus would gain the advantage. It's outward jutting teeth would have to be strong to hold staring and thrashing prey, but they just weren't suited for attacking other dinosaurs. The hooked talons on it's hands, however... As masiakasaurus lacks hunting and attacking instinct, it would probably throw some wild slashes at the lightly built noasaurus, who would be struggling to keep it's snout above the water. Masiakasaurus would probably have experience from falling in to it's hunting grounds, and so would be prepared to get out. And as masiakasaurus would escape the confines of the water, the blood and gashes from the battle would attract some other aspiring aquatic predators. The poor, drowning noasaurus would presumably be finished by a crocodile of some sort or, once it drowned, scavenged by some smaller, predatory fish. So, in the end... MASIAKASAURUS WINS!
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Please read this section before continue in this blog
Currently this blog only contains my personal information on:
1- micropaleontology of a section in Iran (Arak) which described here. (in website gallery only images+microfacies- complete refrence is in the excel file)
2- some palynological works
you probably fisrt should download the following:
- Map of the area: http://wikisend.com/download/391330/Map-final.jpg
- Excel file for the complete refrence(Farsi Refrence is more complete):
- pictures of thin sections are only samples and sure you can't get much information from there. in proper time i will put better images.
- whole content is only for educational purposes and also mistakes happens all the times
- Contents might get updated anytime
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Some Background: I was already somewhat familiar with the idea that one had to have a license to collect certain fossils. As a child, I'd spent enough summer days at Kelly Rock Springs to find the occasional 'other fossil' in addition to the plethora of shark teeth usually found. These other fossils would get enjoyed for the afternoon and then left behind. I never found anything particularly impressive, I needed glasses but couldn't be bothered to wear them around water and thus really couldn't see anything. One day though, a friend of mine found a fantastic large tooth, mastodon or mammoth. Watching him relinquish that tooth to an adult collector with the proper license reinforced the necessity of having the appropriate licensing. Of course, at that time, I would have needed a parent to sign me up and they weren't overly interested. I couldn't blame them, they were busy.
Licensing and Legalities: I'm a chicken. I can't help but feel I should get that out of the way first. I spend hours reading before trying pretty much anything. The first thing I searched for was where to apply for a license to collect vertebrate fossils. I sent in my application and a short two weeks later received back my fossil collecting license. Here in Florida, the license is just for vertebrate fossils collected on state land. Collecting of human artifacts is prohibited. Shark teeth are thus far excluded from any licensing requirements. The license carries with it the obligation to report back all findings before renewing the license at the end of the year. Sixty days from the date of reporting, the fossil ownership reverts to me if the state decides they don't need the fossil.
Deciding where to hunt: This has been a tougher question. I will be taking my 5 year old daughter with me and feel uncomfortable taking her to some of the better fossil locations. Most of the good locations here in the state of Florida are in freshwater rivers which also happen to be the location of gators. That pretty much leaves us with beach collecting. If we join a club, perhaps one of the mine field trips which allow children. In the meantime, another option has availed itself.
Fossil hunting from the comfort of home: I'm trying not to make a nuisance of myself in the forums. I read until I think my brain is as full as it can get and then take a break. I try not to respond as I don't yet have anything of value to add to the conversation. Thanks to this forum, I realized that there aren't just regular sized fossils out there. There are tiny fossils too. In a fantastic stroke of luck, I realized that the micro-fossils I liked the best are from my home state. Better yet, the forum member collecting this material is from my hometown. How's that for convenience?
Starting out with tiny fossils: It was really difficult to resist just digging right into the bag and looking for fossils. I decided that this time I would start out organized. I ordered gem jars and tiny bags from a jewelry supply. I picked up some drug store magnifying glasses and decided to start sorting. Right away, I determined that the drug store magnifying glasses were rubbish. They made things larger, but, still blurry. I pity anyone who tries to read a newspaper with the brand I purchased. At the moment, I am picking out anything that looks sort of biological and then using my Epson V300 scanner to see if anything I've side-lined is actually a fossil. I will have to sort it all again as soon as I have a better way to view these tiny fossils.
Imaging and Identifying: I already own a DSLR, an older Canon Rebel. Unfortunately, I still only own the kit lens. As much as I would love to justify a macro lens, I think that I will start out with a Vivitar close-up lens kit. I'm hoping that with bright enough lighting I will be able to create images decent enough for identifying fossils easily. I would really like a microscope, but, the wide range of options in microscopes has left me undecided. So far, my best images have come from the Epson scanner. I'm hoping that the Vivitar lenses and better lighting will be enough to make the Canon equal to the task. I've already found quite a few neat little fossils, but, I know that my images of those fossils aren't good enough for more than loose identification.
In Conclusion: I'm twenty days into the fossil collecting hobby. I guess I shouldn't feel too bad that I don't have much of this figured out yet. I'm sure that most of this blog won't be particularly helpful to anyone. I'm mostly posting this so that a couple years from now when something hasn't worked out and I'm frustrated with the hobby I can look back and see that I'm a bit less of a dummy than I was when I started. <--- Yes, this run-on sentence is unforgivable, but, I am sick yet again and my 100+ fever is making me apathetic about grammar.
Today I went fossil hunting down to Denton, Texas. The weather was fairly nice with some wind. The outcome were some turrilite fragments, a ton of exogyra arietina (for selling), an echinoid, some Cetaceous/Jurassic sea floor, brachiopods and a clam.
Some of many Exogyra Arietina
Cretaceous or Jurassic sea floor
My days on the Leedsichthys project at the Peterborough Museum.
As a volunteer in the geology department its like a dream come true.
Day 1 and 2: After being introduced and under the expert guidance of Nigel Larkin who is a natural sciences conservator specialising in the excavation, preparation conservation, curation, storage and display of geological, paleontological, archaeological and osteological specimens. We were shown techniques in how to stabilise the base of various sized clay matrixes that hold bones from the Leedsichthys that where originally found around 10 years ago. With Plaster of Paris jackets applied at the dig site when found and in order to keep the bones in place for future research.
And now the Peterborough Museum with funding is in a position to bring these pieces out of storage and continue to work on them in the hope of piecing them together at a later date.
My first two days on the project consisted in reducing the weight of a large clay matrix slab by a couple of inches in order to have sufficient room to apply a fair sized thickness of plaster of paris which would, in turn help to increase stability. Just to help the stability process we also added an acetone / paraloid mix in various strengths into the clay cracks which when dry also aided as a bonding agent for our first layer of plaster of paris.
Top tip for mixing paraloid / acetone mix: Tie your paraloid beads into a small piece of muslin and suspend in jam jar while ###### the lid on this helps with dissolving process of the beads.
So what you can actually see here is the reverse side of the find (the base) with the bones being held in place by the previous dig site jacket. When we are satisfied that the base is secure after our layers of plaster of paris and muslin we will then flip it over to take the old top jacket off to expose the bones in readiness for prepping them out of the clay matrix.
Layering the plaster of paris was like icing a cake using various sized knives in order to give it a smooth finish. You had to work it a reasonable steady pace as the mixture set very quickly also if possible not to let the new mixture touch the old top layer plaster jacket as this would hamper removing the top jacket.
There are several pieces of clay matrix slabs so we will perform this prepping technique to all of them.
Day 3: Back in the prepping laboratory at the Peterborough Museum to help finish off the plaster base on the largest clay matrix slab.
After a good clean up after us around the Lab (plaster of paris is a very messy business). It was decided to retrieve two larger jacketed slabs out of storage in order to look at them further and to assess our plan of action.
Now these slabs where quite heavy with added weight from the made to measure wooden palate structures underneath them that Nigel had made to increase stability so it was all hands on deck to move them into position and onto our prepping table. We have been taking photos as often as possible with each and every step of the way with this project and making notes of any written marks that may have been applied to the jackets at the dig site. More photos were taking of the cast before we decided to take the top cast off to expose clay matrix with the bones encased within.
There were lots of boney elements intertwined with the clay with no formal identity as such to what we are looking at as yet with this particular slab. So again under the guidance of Nigel Larkin we tentatevly removed some small fragments of wood with tweezers and scalpels that had adhered themselves to the bone and clay.
Nigel had outlined in precise detail how best to start the cleaning process using some acetone and air abrasives on the bones and how to remove foam material that is connected with the original plaster the cast when jacketed at the dig site. This will enable us to reapply fresh plaster of paris to enhance the stabilizing process as we work on and around the clay matrix. To which hopefully I’ll be taking part in on my next visit to the museum.
Day : 4 ( 13/10/2015)…Back at the Museum for a catch up with other volunteers to see what stage we are at and to learn any new techniques that have been applied for the restoration of the Leedsichthys.
With PPE applied i.e. face masks and gloves we started to remove the old foam and any old overlapping plastered muslin. Also with the aid of an extraction unit to catch any airborne dust particles from the foam as we used our scalpels.
When satisfied that a section of the outer clay was exposed with as much foam and debris removed as possible. It was then decided to add a 15 per cent acetone paraloid solution to the clay not only to help strengthen it but by also to act as an adhere for the plaster of paris to stick to.
With a combination of plaster of paris and muslin we worked our way around the outer edge of the clay slab applying the techniques I’ve just discussed.
That was me done for the day looking forward to my return visit.
Day 5 : 15/10/2015..I was lucky enough to help out at the Museum’s storage facility today to help stabilise a large clay slab with lots of Leedsichthys bone elemnets attached to it. This process did indeed take quite a bit of Plaster of paris and muslin to fill cavities that are around the base of the slab. But the work is vitally important as the clay is quite thin in places so we need a strong base in order to work some of the plaster of paris up the sides to support any overhanging clay matrix.
We estimate this should take at least two days to complete if I’m fortunate enough to resume with this I’ll keep you updated on how it’s going.
Day 6: 10/11/2015
If I apply the phrase “Absence makes the heart grow fonder “can I use this for today’s visit to the museum…erm…yes...definitely.
Especially as we had the pleasure of meeting Professor Jeff Liston who is a world expert when it comes to working with the Leedsichthys problematicus. Just before Jeff briefed us on what duties we would be carrying out today he dropped in the classic line ( jaw dropping time ) “ As you know we are working on the most complete Leedsichthys problematicus…in the World. “
Heres a you tube clip about Jeff Liston working on a
We gathered our senses and composure to continue tentativily working away at various spots with acetone. To clean away old paraloid solution that had been applied at the dig site to reveal more tell-tale bone.
Also the piece we were working onto today has been identified as one of the head plates where we have now exposed the rostrum as well.
All in all it was another therapeutic few hours enjoyed by all the volunteers on this project.
Day 7: 17/11/2015
Back in the museum for a few hours to catch up with other volunteers on the project and to summarize on what stage we are at. Also to learn any new techniques needed as more and more bone is revealed.
Nigel Larkin had returned for the day to see how we were getting on and to further oversee the practices he had taught us on the first week of the project. We all feel quite comfortable in our new found prepping skills. But even more so with the presence of Nigel as he seems to exude some sort of air of confidence.
For example on my last visit I was removing some old paraloid from a section of bone by gently brushing some acetone over the bone then using a sharpened wooden spatchuler to remove the residue. But I found the residue congealing faster than I could remove it so Nigel showed us how to confidently remove the residue with sharp scalpels with the blade flush and flat to the bone going with the grain. In order remove the sticky residue then gentle wipe over with Lint free paper which certainly made all the difference to bring out all the hidden contours of the bone and its beautiful brown colouration.
Jeff Liston was also present busying himself with further research on identifying the bones as they become more apparent. Jeff had identified one of the larger slabs as a Right Hyomandibular which helped work on to remove any lose clay form the edges in order to strengthen the cracked but stable clay edges for consolidating. We noted on the wooden pallet left side and right side then marked up some zip lock bags ( Left side and Right side ) to put loose clay matrix in for further studies i.e. Macro-Palaeontology. Any recognisable bone fragments that we encountered we put on the top of the slab for consolidation at a later date.
That’s me done for today…speak soon.
…..Where was I, oh yes I remember now, working on the Leedsichthys project with a team of volunteers and some experts in this field, how could one possibly forget.
The chilli morning air is no bother when focused.
It certainly does seem a long time since I was in the prepping room of the Peterborough Museum. But as I’m sure you are aware especially the musuem voulnteers amongst us. Work and family life always take first place, but when you get amongst the fossils again everything ticks along and fall into place nicely.
There is still plenty of work to do as you can imagine when working on a specimen labelled as the World’s Biggest Fish. So as uaual we tentatively brushed over the old Paraloid that was used at the dig site to stabilize the finds. Armed with an array of small brushes and sharpened wooden picks as not to scratch the bone.
Very satisfying and therapeutic few hours with my work colleagues and especially nice to catch up with Jeff Liston and ask when his forthcoming book about the Leeds brothers will materialise.
Speak again soon.
You too can follow is work on the links below if you like:
On Twitter: BigJurassicFish
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I'm looking to plan a trip for shark teeth hunting possibly in Summerville, SC. Im currently in Pender County, NC, so Green Mile Run isnt out of the question. Any suggestions, locations or people who want to group up? Haven't had too much experience, but i've leant its the company that matters over what you find.
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An enormous bipedal dinosaur believed to be able to run up to 25 mph. Sue was the largest specimen ever found measuring 40 feet long and standing 13 feet tall. She was 28 years old when she died of unknown causes possibly an injury to her leg causing her to be unable to hunt her normal prey. Tyrannosaur weighed about 9 tons. While not as long as some of the other carnivores of its time Tyrannosaurus was a dangerous beast although some believed it to be a scavenger. They lived in North America from the Dakotas to New Mexico.
It was believed to have had feathers as a chick
A braincase of an adult specimen. It had a large section in its brain devoted to strategy
The growth rate of an average Tyrannosaurus Rex
Adult skull and the skull of an 11 year old juvenile
A track believed to be Tyrannosaurus
I went to Post Oak Creek and found a lot of teeth. The water was freezing and my feet were numb. I recommend going there if you live in Texas. Summer or Spring would be the best time to go. For me the water levels were high but I used a sifter and found some cool things.The results were 20 teeth and a lot of shells.
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Alethopteris are quite common at Saint Clair location. But apparently there are at least 6 different species.
These are all from "Fossil Plants from the Anthracite Coal Fields of Eastern Pennsylvania."
A zip file that contains the PDF can be downloaded from http://www.dcnr.state.pa.us.
Here's a direct link.http://www.dcnr.stat...dcnr_016425.zip
Sigmund Freud theorized that the act of collecting ties back to the time of our toilet training. Freud suggested that the loss of control and what went down the toilet was a traumatic occurrence to us human and thus in our subconscious we develop the desire to collect things as a mean to try to gain back not only control but “possessions” of that which were lost so many years ago.......
O.K. if I tried to rephrase what I just shared in a non-academic language is that we human collect because of the trauma we faced when we couldn’t control and keep our poo poo when we were toddlers - man that sounds pretty bizarre (in a funny and entertaining way - no disrespect to Mr. Freud) while at the same time stirred my brain into thinking really deep about the purpose, the psychology and even the philosophy behind our beloved hobbies of collecting, whether they be fossils, minerals, books, etc.
Thus in this blog, I will attempt to share my thought and theories that are my own take on this particular subject. Though I will have to say in advance before you read that this is in no way an attempt to be academic in nature - just pure ramblings for the purpose of my own amusement and if it turns out to be enlightening then all the better! So here it goes:
**switching on psychological rambling mode**
My perspective and belief is that collecting is an act that is stemmed from our human nature’s instinct that reacts towards “Fear” and “Uncertainty”, and there are quite several motives and psychology behind collecting that I believe support this notion:
Fear of Mortality
A collector collects due to a deep rooted fear of mortality and whether if you will be remembered or leave legacy after you have passed away. We can observe collectors of this type who often will go on to donate collections to public institutions or create museums to exhibit their collections. We as human (at least I believe most of us are anyway) desire to be remembered in some ways and thus our collection or what we have contributed will leave a mark in history and in essence immortalize us with our legacy which is our collections.
Fear of Being Alone
Some collectors start collecting as a mean to seek company of like-minded individuals who share similar passions or to experience acceptance as be part of a unique society, group and culture; for we human are social animals that instinctively seek group safety and social belongings or we become lost and terrified. This motive therefore, is also based on our fear instinct that has been implanted in our psyche.
Fear of Non-Existence
I think it’s probably sensible to assume that we all collect in order to know more about ourselves or to remind us of who we are, our interests, our loves, our passions and our nostalgic pasts. Thus the motive of collecting from this perspective is related to our fear instinct. For to remind of ourselves is to reinforce ourselves that we exist while at the same time reminding us of moments of happiness that make us feel alive - and those moments for collectors are the times we interact with and make ourselves surrounded by the objects of our obsessions. In addition we could say that, the act of building a collection creates a type of blueprint of our inner psyche and of a person’s life through the objects the collector acquired and cherished - the experiences the collector went through in his life. Therefore, the act of collecting is the act of painting a portrait of our life stories and our souls, through objects that speak about our love and fascinations. It reinforces our identity, our memories and our existence.
Fear of Uncertainty & Chaos
Collecting as a mean to create meaning to an otherwise seemingly chaotic world. We as collectors collect by gathering groups of objects that form cohesiveness or relationship between the pieces or to tell a certain story behind those naturally unrelated pieces and thereby forming meaning to the collection. Some collectors form collection in response to certain problems or sense of wonder of the chaos presented in front, and by building a collection the collector is able to tackle that problem. For example, a collector might face the question of “How can I represent the diversity of the Eocene mega fauna of North America?” (problem / chaos) and thus the collector embarks on a collecting quest to gather specimens that would build a complete collection of Eocene North American mega fauna specimens collection (solution / order). The act of collecting creates a collection that in essence, becomes the solution to the collectors dilemma. This, I would also say that is part of our deep rooted human psyche of fear of chaos and the unknown, and thus our instinct is to try to limit the chaos by creating orders (or illusions of order) to an otherwise chaotic world (in our perception at least) much in the same ways as how the early humans banded together, formed groups and created cultures or rituals to face the world’s problems or threats. Collectors on the other hands, tackle the chaos by creating order in the collection and in so doing the collector gains a semblance of power and control over disorganization and chaos.
Fear of the Absence of Aliveness
Collecting is without a doubt, a pleasurable pursuit for collector, whereas an audiophile takes pleasure in listening to music, food connoisseur indulges in the enjoyment food & wine, or art aficionado indulge in art appreciation and possession. We collectors induce our senses of aesthetics and pleasure from acquiring and creating collections of objects in order to feel enjoyment. In a way, this could be viewed as related to our fear instinct because we fear to not being able to feel the pleasurable pursuits in life. For we human feel alive when we experience such pleasures, whether the pleasures be from the indulgence of consumable & wearable objects or simply to possess and be surrounded by the things that give us joy like our collections.
Fear of Powerlessness
Collecting can be viewed as an act that I think came from our hunting instinct - to explore our sense of wonder of the unknown, to challenge the goals of acquisitions of hard-to-find objects; this in my view is in essence “the thrill of the hunt”. This particular collecting mindset is also based on our response to our fear instinct for when we hunt, we transform ourselves from being powerless prey to being powerful hunter and dominators - thus hunting (or in essence collecting) is an act to overcome our fear instinct while the “hunting” and while at the same time the journey of the hunt makes us feel alive. Also, when thinking about this motive I think it makes sense as we tend to see many collectors tend to be drawn to fossils of creatures of great power and ferocity or majestic beauty. For some collectors to possess such specimens make the collectors feel the power of those long dead creatures probably in similar manners in how hunters have trophies of their hunt to show their skills as hunters to overcome such beasts.
Now don’t these reasons and psychology of collecting sound much more appealing than Sigmund Freud’s potty training explanation? But, before some may think that “Collecting = Fear” may seem like a degrading notion at first glance, I present to you my next theory:
**switching on philosophical rambling mode**
Fear of Being just another Animal - Collecting to Transcend Humanity
Despite our instinctual fear that drives us to collect, the act of collecting is also an act of human transcendence and transformation. Some collect objects of power to symbolize the attaining of that power or the conquering of such powerful force that ultimately makes us feel more powerful than who we are without the collection. An act of collecting transform us into more powerful being (whether physically, socially, economically or spiritually): a person with no social distinction or significance can become conservators, scholars and even admired icons of historical significance. Collecting can transform the powerless into the powerful, the ignorant into a scholar, a hoarder into a curator and in many cases, turning common man into sage.
Our fear of mortality, uncertainty and instability of our universe makes us human so special and able to achieve our transcendence from mere creatures of survival instinct into creators, innovators, artists, philosophers or sages. Thus it is the shadow that allows us to appreciate the light; the fear of death that makes us cherish the beauty of life; the brutality of our darkest side that gives rise to the reactionary opposites that make us saints, protectors and self-less beings capable of great courage and heroism.
Therefore, even if the psychology of collecting comes down to “Our Fear of Mortality” (death with no legacy or inability to feel “alive”), “Our Fear of Non-Existence” (due to the lack of social presence, acceptance or without a group to belong); that very fear creates motives for us to have “Desire for Transcendence” into something more than what we are. Thus I would make the case that the act of collecting is both instinctual (as a reaction to our deep rooted fear of mortality & physical existence) and spiritual (as a path [and an enjoyable one!] towards transcendence of the human existence).
**switching off philosophical rambling mode**
My goodness after I just wrote all that, I just had an idea that the next time, when I meet people who think my collecting and obsession with eclectic objects are weird, bizarre or non-sensual, I can start quoting my philosophical ramblings that my collecting hobby allows me to transcend spiritually and start going into Zen mode - that’s should be entertaining to say the least, lol. Who would have thought our hobbies could be so spiritually stimulating.
Anyway that’s all for my rambling for today. Hope you enjoy the blog entry
I thought i'd just make the one blog for pretty much everything that i find or want to post, rather than different blogs for different types of specimens, as i'm not a particularly busy hunter. If ever i go on a fossil hunting trip, or uncover a fossil in my back garden, then i will probably post pictures on here, as well as anything else i feel you should know! Thanks for taking your time to read this utterly boring introductory post thing, and i hope to post soon!
Dear Fossil Forum members!
This report deals with ammonoids from the former zone of Protrachyceras archelaus, which is our present Longobardian within the Ladinian stage of the marine Triassic timescale.
A beautiful view of the surging “rock waves” of the incoming tectonic thrust sheets. The valley between the two Mountains in the middle of the picture marks the tectonic border between the mainly Triassic Hallstatt Unit and the Tirolikum Unit of the Totengebirgs nappe (in the background).
Since the beginning of the geological research within the Northern Calcareous Alps of Austria in the middle of the 19th century, about 500 species of Triassic ammonoids have been described in great Monographs by Mojsisovics, Hauer, Diener and other early authors. The ammonoids described therein came from upper Anisian to uppermost Norian aged parts of the Hallstatt limestone in Austria.
Only in the lower to middle Ladinian period, a gap exists in the rich ammonoid record of these early researchers.
This gap was explained by them as an interruption of sedimentation in the Ladinian time or tectonically reduced Ladinian strata during the genesis of the Alps.
During these early days no one thought of a collecting gap because Ladinian ammonoid faunae were well described and known from several localities in the Southern Alps and the Bakony Mountains in Hungary.
In 1882 Mojsisovics pictured ammonoids of Anisian and Ladinian age in his monographic work “Die Cephalopoden der mediterranen Triasprovinz”.
The locations mentioned therein reach from the upper Anisian Schreyeralm limestone here in Austria to several Ladinian locations of the former Austrian provinces Südtirol, Lombardy and the kingdom of Hungary, which were also part of the former Austrian-Hungarian Monarchy at this time. Included in this work were also Scythian and Anisian ammonoids from Croatia and Bosnia-Herzegovina.
Fig.2 Frontpage of Mojsisovics second great monograph from the year 1882.
“The detailed accurate descriptions and illustrations provided by Mojsisovics are unquestionably the greatest contribution by a single author towards appreciating the astonishing beauty and variety of Triassic ammonoids” (cit. E. T. TOZER).
Therefore every recent Triassic ammonoid researcher includes these old works in the standard literature of Triassic ammonoids. These old works were so to speak, a cornerstone for building the marine middle and upper Triassic timescale of our days.
Unfortunately the early stratigraphic scales of Mojsisovics had some mistakes. Originally the stratigraphic position of the “Norian” stage was set by him below the Carnian.
He used the term Norian for the time frame we today call Ladinian. Mojs. thought that most parts of today’s real Norian Hallstatt limestone of Austria were of the same age as real Ladinian strata in the Southern Alps. Some misinterpret location data, i.e. the wrong assumed position of the fineclastic Zlambach marls as base of the Hallstatt limestone led him to this wrong assumption.
It was the Austrian geologist Alexander Bittner, a contemporary of Mojsisovics, who introduced the term Ladinian into literature by recognizing the false assumptions of Mojsisovics. The name Ladinian was chosen by Bittner after the Ladinian folk of the Southern Alps/Dolomites. At this time this area was also part of the Austrian-Hungarian monarchy with its capital Vienna and it’s so called “Vienna school” of the palaeontology institutions there.
Probably this “miss take” of Mojsisovics led to some changed ammonoid zones within the Norian timescale, which last into the 20th century.
It was the merit of the Canadian Triassic worker E.T. Tozer to correct this long lasting error by establish his own North American Triassic timescale, based only on North American, mainly Canadian Triassic ammonoid locations.
The pelagic (deeper marine) Triassic sedimentation in Austria starts with the uppermost Anisian Flexo-Ptychites beds/lenses of the Schreyeralm limestone. This is also the base of the Hallstatt formation. The next frequent ammonoid lenses/layers occur within uppermost Ladinian/lower Carnian strata in this formation. The lower to middle Ladinian time frame in between was not well documented with ammonoids by the early researchers of the 19th century. At some historical locations the lower Ladinian part is/was given but was not really recognised by them.
Later, modern researchers used microfossils to determine the placement of large parts of the grey to violet limestone in the Hallstatt formation into the Ladinian. Within the 20th century also scarce ammonoids were mentioned from these middle Ladinian strata.
Fig.3 Anisian Schreieralm limestone with cross sections of Flexoptychites sp.
Fig.4 Monophyllites sphaerophyllus (HAUER) from the Schreieralm limestone
In general, ammonoid locations are not frequently known within the Ladinian part of the Hallstatt limestone.
The most common fossils are Crinoid stem parts, Bivalves and Conodonts.
The limestone facies consists of red to grey, sometimes yellowish to grey coloured limestone which is locally interbedded with marls.
Also strongly condensed successions are common there and fossils also do not occur in continuous layers.
Comparable Ladinian ammonoid faunas are also well known from similar Hallstatt type limestone in Greece and Italy. They show similar ammonoid faunae of Ladinian to Carnian age.
In the Tethys realm the whole Ladinium is split into two subdivisions today.
Upper Ladinian = Longobardian,
Lower Ladinian = Fassanian,
The historical zone ammonite of the Longobardian is Protrachyceras archelaus (LAUBE).
Protrachyceras archelaus (LAUBE), in MOJSISOVICS “Die Cephalopoden der mediterranen Triasprovinz“ Wien 1882
Tafel XXXL, Fig. 1,
But Protrachyceras archelaus LAUBE do occur within a longer time span and is therefore not perfect for stratigraphic aims. The old archelaus zone of the Ladinian was therefore changed into several Longobardian and Fassanian ammonoid zones of today.
Within the Tethys realm the Longobardian is split into the ammonoid zones of:
The Fassanian is split to the ammonoid zones of:
The ammonoids shown in this report come from a condensed fossil bed roughly inserted to the turquoise marked ammonoid zones of the timescale below.
Historical Ladinian locations
The condensed lower Carnian fossil lenses on the famous historical Feuerkogel show almost all a portion of the upper Ladinian at their base. This is also visible at other Lower Carnian locations within the Hallstatt limestone.
During the last years Proarcestes sp. from a new location are sometimes shown for sale in the internet. They are sometimes identified as Arcestes sp. from Norian strata. But it is Proarcestes, therefore its Norian age is definitely wrong.
I visited this new locality a few years ago. All locations there are of Ladinian age which is evidenced by Proarcestes cf. subtridentinus, Anolcites sp. and Epigymnites sp. This fauna is maybe slightly younger than the fauna shown later here in this report.
Fig.6 Some Epigymnites arthaberi (MOJS.) and Epigymnites moelleri (MOJS.) from the above mentioned location
The new location
Several years ago a friend and I were lucky to find a hitherto unknown middle Ladinian ammonoid location during a prospecting trip. At this location the normal limestone succession is penetrated by several fractures and tectonic influence across the normal layer direction is also visible there. The fossil layer itself, in which ammonoids were frequent, consists of a very strong condensed upper part of lower Longobardian age, indicated by Protrachyceras longobardicum (MOJS.), and a lower part of a slightly older age indicated by scarce last descendants of Ptychites cf. pauli MOJS. which show deeply incised second and third lateral saddles similar Aristoptychites or Arctoptychites.
Therefore the location is ranged by me to the transition of the ammonoid zones of Protrachyceras longobardicum and the underlying Eoprotrachyceras gredleri zone. Outside of the Tethys realm this is roughly comparable to the zones of Meginoceras meginae MC LEARN and Tuchodiceras poseidon (TOZER) of the North American timescale. Both zones are known from the Triassic of British Columbia in Canada too. Tozer, 1994, wrote that flat forms of Protrachyceras sikianum MC LEARN are comparable with Protrachyceras longobardicum (MOJS.) and the thicker morphs of Pt. sikianum MC LEARN with Pt. archelaus (LAUBE).
View of the lower, sometimes more greyish limestone part of the fossil layer. The chisel points to a Sturia cf. semiarata MOJS.
The furrows on the limestone block have their origin in the strong condensation of this limestone. One can recognize by this feature the underlying part of a condensed limestone (fossil) layer.
In contrast to the above shown picture, a view of the underside of the overlaying layer where craters/hollows are visible. These two features can be used for recognizing up and downside in strongly condensed limestone. This feature is independent from the Triassic age of the rock and occurs in condensed limestone of Jurassic age too.
The right hanging limestone block contains the fossil layer.
Protrachyceras longobardicum (MOJS). in situ. View from the underside. The upper half of the ammonoid was totally dissolved due to the extreme condensation of the uppermost limestone layer at this location.
In this location P. archelaus occurs very scarcely. It is no good indicator for stratigraphic aims here at all.
A normal collector can use the following features to insert ammonoids into the Ladinian timescale.
The frequent occurrence of Proarcestes sp. with a wavy end body chamber is a sign for Ladinian age.
All forms of Sturia sp. are restricted to the late Anisian and Ladinian.
The occurrence of real Ladinian Protrachyceras MOJS.
The following picture will show you the main differences between Protrachyceras, Trachyceras and Neoprotrachyceras.
In contrast to Trachyceras the venter furrow of real Protrachyceras MOJS. is bordered by nodes which show a single point per node. Protrachyceras are restricted to the Ladinian.
Real Trachyceras show “broader” nodes with two or three points a node bordering the venter furrow. Trachyceras is frequent in the Lower Carnian (Julian)
The genus Neoprotrachyceras KRYSTYN looks similar toTrachyceras but shows also just one point per node, sometimes changing up to two points per node within maturity. Neoprotrachyceras is restricted to the uppermost Lower Carnian and lowermost Upper Carnian (e.g. the genus Spirogmoceras SILBERLING in the Dilleri Zone of the North American Tuvalian)
For a newbie collector it is difficult to find some fossils in the Hallstatt limestone at all. To place them into the right ammonoid zone is sometimes the easier part of the exercise.
A weathered cross section of Proarcestes sp., visible at the limestone wall. Notice the bleached limestone surface in contrast to the colour of the fresh rock.
Talus block with visible cross sections of ammonoids and orthocone nautiloids
Natural picture size is 20cm. The edges of the fossils are deeply weathered in. This can be a sign that the fossils will probably split out well.
Small idiomorphic Biotite crystals up to one mm in size, fine Feldspar crystals and thin greenish tuffitic crusts around some ammonoids and limestone clasts indicate a distant simultaneous volcanic event, adjacent to the palaeo Hallstatt realm. This is the very first observation of volcanic fallout/washout within the Hallstatt limestone column.
Within other tectonic nappes in the Northern and Southern Calcareous Alps (Dolomites) volcanic (Tuffitic) ash layers are a frequent feature in Ladinian time. In the adjacent Tirolic nappe some volcanic/tuffitic events are evidenced near the base of the archelaus zone.
The middle Ladinian fauna listed below was found at this location.
cf. Beyrichites sp.
Eupinacoceras cf. damesi (MOJSISOVICS).
Epigymnites cf. ecki (MOJS.)
Epigymnites cf. breunneri (HAUER)
Epigymnites arthaberi (MOJS.)
Gymnites raphaelis TOMMASI
Megaphyllites obolus MOJS.
Monophyllites wengensis (KLIPSTEIN)
cf. Silenticeras sp.
Sturia cf. sansovinii MOJS.
Sturia semiarata MOJS.
Proarcestes ombonii TOMMASI
Proarcestes subtridentinus MOJS.
Protrachyceras archelaus (LAUBE)
Protrachyceras longobardicum MOJS.
Ptychites cf. pauli MOJS.
Ptychites cf. plusiae RENZ
Syringoceras cf. longobardicus
Nautilus div. sp.
Austriellula dilatata (SUESS)
Important ammonoid species of the archelaus zone
A beautiful, conspicuous faunal element of the archelaus zone is Protrachyceras longobardicum MOJS. the zone ammonoid of the Langobardicum Zone
This species shows its maximum roughly in the lower middle of the former archelaus zone and can be used well for stratigraphic aims. As mentioned earlier in this report compressed variants of Protrachyceras sikanianum MC LEARN are comparable to Pt. longobardicum MOJS. The thicker variants of Pt. sikanianum rather resemble Pt. archelaus LAUBE.
Fig. 13 Protachyceras longobardicum MOJS. with Proarcestes ombonii TOMMASI and Proarcestes cf. subtridentinus MOJS.
Fig. 14 Pt. cf. longobardicum, some juvenile Arcestes sp. and the brachiopod Austriellula dilatata.
Fig. 15 Epigymnites breunneri (HAUER) and Monophyllites wengensis (KLIPSTEIN)
Fig. 16 Epigymnites arthaberi MOJS. and Monophyllites wengensis (KLIPSTEIN)
Fig. 17 Gymnites raphaelis TOMMASI
Fig. 18Discinisca sp. Looks like a fossil Limpet gastropod (Patellidae) but in reality it is an inarticulate Brachiopoda
Fig. 19Sturia cf. semiarata together with Proarcestes cf. ombonii
The most frequent faunal element of the Ladinian within the Tethys realm is Proarcestes BRONN. This genus occurs with several species up to Carnian strata. In our location Proarcestes subtridentinus MOJS. and Proarcestes ombonii TOMMASI was often found. The second one can reach the dimension of a small ball.
Fig. 20 Proarcestes subtridentinus
Fig. 21 Monophyllites wengensis (KLIPSTEIN)
In the Hallstatt limestone this genus starts with the Anisian Monophyllites sphaerophyllus via the Ladinian M. wengensis up to the Carnian M. simonyi. Within the descendants of the Triassic Phylloceratida the ancestor of the Jurassic Ammonitida is supposed.
Fig. 22 Ptychites cf. pauli MOJS. This species of Ptychites show deeply incised second and third Lateral saddles. I think that this is a feature of allmost all "late" species of Ptychites.
Fig. 23 Ptychites cf. plusiae RENZ
Fig. 24 Sageceras walteri
I hope you have enjoyed this new report about the Ladinian strata of my favourite collecting area.
Again I thank, “Danke Roger”, Fossil forum member “Ludwigia” for correcting my “Austrian” English.
ALMA, F. H. (1926). Eine Fauna des Wettersteinkalkes bei Innsbruck. Annalen des Naturhistorischen Museums in Wien, 40, 111-129.
BACHMANN, GH, JACOBSHAGEN, V (1974) Zur Fazies und Entstehung der Hallstätter Kalke von Epidauros (Anis bis Karn; Argolis, Griechenland). Z Deutsch Geol Ges, 125: 195-223
DIENER, C. 1900: Die triadische Cephalopoden-Fauna der Schiechlinghöhe bei Hallstatt. Beiträge zur Paläontologie Österreich-Ungarns und des Orient 13
v. HAUER, F. (1888). Die Cephalopoden des bosnischen Muschelkalkes von Han Bulog bei Sarajevo. KK Hof-und Staatsdruckerei.
von Hauer, F. (1888. KK Hof-und Staatsdruckerei.
KITTL, E., 1908, Beiträge zur Kenntnis der Triasbildungen der nordöstlichen
Dobrudscha. Denkschriften der mathematisch-naturwissenschaftlichen Klasse der
kaiserlichen: Akademie der Wissenschaften, v. 81, p. 445- 532
KRISTAN-TOLLMANN, E, KRYSTYN, L (1975) Die Mikrofauna der ladinisch-karnischen Hallstätter Kalke von Sakliblei (Taurus-Gebirge, Türkei). Sitzungsber. Österr. Akad. Wiss. Math. Naturwiss. Kl. Abt. I, 184 (8-10): 259-340
KRYSTYN, L. Zur Ammoniten und Conodonten-Stratigraphie der Hallstätter Obertrias(Salzkammergut, Österreich), Verh.Geol. B.-A., Wien 1973
KRYSTYN, L (1983) The Epidauros Section (Greece) – a contribution to the conodont standard zonation of the Ladinian and Lower Carnian of the Tethys Realm. Schriftenreihe Erdwiss. Komm. Österr. Akad. Wiss., 5: 231-258.
MOJSISOVICS, E. 1893: Die Cephalopoden der Hallstätter Kalke, Abhandlungen der Kaiserlich-Königlichen Geologischen Reichsanstalt, II Band, Wien 1893
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Hello to The Fossil Forum!
Lately I am starting a souvenir collection of Aetobatis fossils. It's slow going, but I am just beginning:) I do all my collecting trading or purchasing fossils, since I live in Hawaii, and am disabled so can't easily get out in the fossil fields.
When I was young I used to see the baby Spotted Eagle Rays swimming in the bay or out in the canal at Waikiki. They are adorable! I don't know how long this link will be good, but here is a short video I found on the net. Someone is selling live baby rays for aquariums. So cute!
I want to recommend 2 of some of my favorite fossil dealers for shopping for shark and ray fossils.
Buried Treasure Fossils: http://www.buriedtreasurefossils.com
Vast selection of shark and ray teeth from all over the world, you can spend hours just browsing these catalogs! Very informative as well as very good shopping!
Fossiliferous: E.R. Matheau-Raven:
Very nice selection of all kinds of fossils, with a lot of unusual UK pieces.
I just ordered some Aetobatis teeth from both of these friendly and helpful dealers this morning. The teeth are fragments, but very good ones, fine examples of extinct Aetobatis. Some of the pieces are 1" long, I wonder how bit the rays were in life?
That's all for now, talk to you all soon:) Good luck fishing in stone my friends!
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So im a little unsure where to start out, i guess im going to write this all down to try and gather my thoughts and update my progress, Im aiming to become competent enuf in fossil prep to be able to get a paid full time job in something im massivley intrested in. Currently ive got boxes and boxes of uk fossils, mostly ammonites. They all need prepping too. Seems the ideal place to start, but first i need the equitment. Check, well sort of ive got a compressor and a st pen tho its in storeage and about 300 miles away. When i did use it ive found it nearly impossible to clen anything up, so the next step is to get a TT pen orderd. money permitting i shuld have this by the end of this month.
On a slightly unrelated not......ive got all these ammonites and would happily trade them for other fossils so i can get some slightly diffrent things to prep. Secondly im in the UK , so anyone wanting to come over hear to hunt let me know as ive got some sweet spots whear ive found an icthysaur and ammonite about 18inches across. I will add pics some time but they are in storeage too at the moment.
Recent EntriesLatest Entry
Hello Everyone its been way to long since my last entry. I've been sharing on the Facebook page because its so easy to upload from my phone. But I will start back bogging...... I miss it
I found these cephalopods two weeks ago here in middle TN- Leipers Formation from what I'm told. I found it interesting how the shell casing seems to have been peeled back on both......
Seed ferns (Cyclopteris, Neuropteris, Macroneuropteris, Mariopteris, Mixoneura, seed fern rachis impression, seed fern male fructification)
Calamites (Calamostachys, Macrostachya, Asterophyllites)
Cordaicarpus (Cordaites seed)
Jurassic (Bothonian) petwood
to be continued...
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