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Showing results for tags 'pennsylvanian'.
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From the album: Texas Pennsylvanian: Echinoderms (Crinoids and Echinoids)
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From the album: Texas Pennsylvanian: Echinoderms (Crinoids and Echinoids)
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From the album: Texas Pennsylvanian: Echinoderms (Crinoids and Echinoids)
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From the album: Texas Pennsylvanian: Echinoderms (Crinoids and Echinoids)
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I am new to micros but I have had at least a cursory look at bulk samples from a variety of sites and ages, mostly Texas and Pennsylvanian. The material from this one Pennsylvanian site in Oklahoma seems so far out of the typical range for quantity of fossils I am wondering what others think. Most of what I have looked at will show me a fossil for every 50 to 100 rocks and I consider that normal. This site has matrix that, when cleaned and screened to remove the finest shale particles (60 mesh) has hardly anything but fossils! The biggest problem with that is deciding what to keep and what to discard, however, if the trade-off is diversity over quantity I might prefer to see less fossils. I found mostly broken pieces of bryozoans but quite a few crinoid parts and not mostly stem sections like I usually see. There are some brachiopods and a few corals but the paucity of mollusks seems odd. In the first batch I took home there were no bivalves, no cephalopods and only one gastropod! Odder still I did find a trilobite genial spine and the tip of a conulariid, things that are usually far less common. There were also a few conodonts or maybe scolecodonts and some ostrocods. I went for another gallon baggie-full and finally got a few more gastropods, very few bivalves and one orthoconic nautiloid. Besides the large quantity of fossils I am curious about what conditions might contribute to that lack of diversity. I can not be certain about the formation but it appears to be in the Deese group. Geologists I have asked say the area is a geological mess so anyone who could volunteer to clear up the confusion is welcome to have a look! It is west of I-35 and south of Ardmore. Below are photos of the matrix after I screened out the finest shale particles. Scale is millimeters.
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My sister found this at Mineral Wells the last time she was there. Anybody have any idea what it might be? It's very thin and plate like. Could it possibly be a crustacean shell?
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Taking advantage of the good weather and less traffic on the I-95 because of Super Bowl Sunday, I and my husband decided to head south to North Attleboro, MA to explore the Pennsylvanian age plant fossils from possibly the Rhode Island/Wamsutta Formation. We drove to a park near the site and hiked about a mile through the pine forest and reached the outcrop which has expanded into a shale pit. The specimens here are preserved in great condition and are abundant. The pine forest we walked through. The shale pit full of plant fossils. Here's some finds from my trip. I have tried my best to identify my finds. Let me know if I made any mistakes. Neuropteris Scheuchzeri A seed fern specimen that was too big to carry back home. A mish mash of fern fossils and a baby seed fern which I also had to leave behind. Possibly the top of Annularia sp. peeking out in the middle Calamites More calamites and Neuropteris sp. on the bottom side of the fossil on the right. A lot of fossils overlapping. Cyperites sp.?? Pecopteris sp. (This is a chunk that broke off the large fossil towards the end of the post) A closer look at the same fossil with a different angle showing possibly Annularia sp. Cyperites on the lower side Is this some type of micro fossil?? Neuropteris Heterophylla ?? Calamites More seed ferns?? This is a big specimen I brought home with a bunch of fossils on the front and back and it weighed about 10 pounds. Closeups of them are as follows. The clearest fossil on this side is a Pecopteris sp. I assume. I used water to clean some mud off this specimens and noticed a few more fossils peeking out of the rock. Hope you enjoyed my post. Feel free to ask any questions. Happy Fossil hunting!!
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- 14
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- carboniferous
- massacusetts
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I've been spending a lot of time lately studying the Mazon Creek flora, and am continuously astonished by the diversity and quality of specimens that can be found. I don't think we see enough plants on the forum, so I figured I would go ahead and share some of my favorite finds. First is a specimen I recently shared, and a fitting start to the thread. This is Crenulopteris acadica, the most common true fern found in the Mazon Creek flora. It has been the most common plant I find, accounting for probably half my finds. Next is a favorite of mine. This is a section of Calamites (probably C. cisti) encrusted by a number microconchids. I always enjoy finding concretions with associations of different species. Last for now is a specimen of the rare seed fern Callipteridium neuropteroides with great coloration.
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- 12
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- carboniferous
- flora
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An Extensive Exposure of the Wamsutta Formation, North Attleboro
Isotelus2883 posted a topic in Fossil Hunting Trips
In 2004, the oldest flying fossil insect fossil, a trace in the Wamsutta Formation, was described in Nature. The locality was several hundred feet from where an extensive exposure of the formation was located in a cut. I was planning to try and locate the locality, but due to time issues I went back to this cut, which I had visited once before. Several other localities containing abundant plants and ichnofossils are located in the vicinity. Here is an image of a shaly horizon that was between thick conglomeratic layers. There are three of these major ones, with the lower being darker and being more of a sandstone. The middle shale layer. Most of the finds were from here, although the lower member had some complete Cordaites leaves that I forgot to take back. Here are the finds from the lower section. Occasionally, there were smoother sections of bioturbated mud between the sandy shale, where well defined trails were preserved. Some raindrop prints. Here is a possible arthropod print, that is very badly defined. In these higher energy layers, some fragmentary plants were found. A Cordaites? bit was found, with some clasts of quartz just below. Some small pebbles of quartz. Now, here are the plants from the middle shaly layer. A Cordaites? fragment, with several other pieces. A certain layer within the shaly horizon was full of these pieces, however there was little variety and there was little need to fill my shoeboxes with these. Some specimens, showed what seemed like borings on them. Here is the most distinct example. I found these, also on plant fragments at three separate localities in the North Attleboro area, including one of the Rhode Island Formation. In the talus I found a decent, but either badly preserved or badly exposed fern. Just from the shape, there are quite a few possibilities on what it might be. Hee is a quite well defined tetrapod footprint I found in a bioturbated layer of the section, which split readily into relatively thin and flat slabs, which allowed for an examination for prints. However, there is quite a bit missing on the other side of the split. And last, not a fossil but a geological oddity. It is obviously a clast from one of the conglomeratic horizons, but something is weird about it. Inside, are more pebbles. It is a conglomerate, that has weathered out and become, itself, a clast of the Wamsutta conglomerate! The clasts within this pebble are of a quite different nature than the ones in the Wamsutta. Though the finds are not very spectacular, the conglomerate pebble certainly made up for it.
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- 10
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- carboniferous
- fern
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From the album: Pennsylvanian subperiod, Monongahela group, West Virginia USA
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From the album: Pennsylvanian subperiod, Monongahela group, West Virginia USA
Seed fern leaves (scale cm) -
From the album: Pennsylvanian subperiod, Monongahela group, West Virginia USA
Seed fern leaves (scale cm)-
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- carboniferous
- fern
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From the album: Pennsylvanian subperiod, Monongahela group, West Virginia USA
Seed fern leaves (scale cm) -
Hello, Could I get an ID on this mazon creek unknown? It has pretty high relief and strong segmentation with makes me think arthropod like a millipede, but I don't see any legs so maybe it's an annelid worm or something.
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- 7
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- francis creek shale
- illinois
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As I continue to explore (see my prior thread Earlier today I visited the Upper Freeport Formation south of East Liverpool. These are sandstones associated with the Upper Freeport coal, so we are at the end of the formation. I have been up here repeatedly over the past year but never explored rocks this old in the area. It was snowing for about two hours this morning but I still spotted some cool fossils. Unfortunately while I saw the Upper Freeport coal, I didn’t have the opportunity to collect in it. Here are two separate medium sized impressions of lycopsid trunks. I then moved further into younger sediments, revisiting where Pteroplax was collected (Romer, 1963). This is a well known site in the literature, reported in most of the Ohio Pennsylvanian age invert reports of the latter half of the 20th century. I’ve been here before, though we mistakenly descended to the base of the cut along the rail line which was frustrating. The circumstances of how Pteroplax was collected are interesting. Look the paper up. That unit it was produced from is no longer evident and completely overgrown and slumped but it’s fine because I was here for the Ames limestone. Everything I collected here was typical of what I have seen of the Ames limestone in eastern Ohio so I have omitted pictures. Afterward I moved on to another section that exposes a larger portion of the Glenshaw Formation (the Ames is the terminal Glenshaw transgression, the Upper Freeport coal is below the Glenshaw’s lowest unit). Here are some Pine Creek (Upper Brush Creek) brachiopods. One is a productid and the other is a part and counter part of a spiriferid (?Neospirifer). In the Cambridge limestone, we found this badly preserved snail. Perhaps with some preparation, it can be identified further. It is fairly beat up. At this locality, the Cambridge is very coarse grained and hard. The snail is not exhibiting the typical preservation qualities of other invertebrate fossils found here. In a younger unit, I found this partial Deltodus tooth as well as a possible actinopterygian scale (I have my doubts but friends are certain). Both are hanging out with broken bellerophontid snail pieces. Tomorrow I will be in the Mercer (Pottsville Group) which is older than anything you’ve seen in these two threads. If I find anything worth sharing, I’ll share! In the future I will be updating this thread for the entire month (and maybe the year) instead of starting new threads.
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- 11
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- ames limestone
- appalachian basin
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Hey guys! It’s been a long time since I’ve been active on the Forum, but I have an exciting update - I just published my first paleontology paper on Christmas Eve! It’s a short paper documenting two shark species that are previously unreported from the LaSalle Limestone of northern Illinois (you guys may know it as the Oglesby roadcut!), Heslerodus divergens and Ossianodus sp. I’ve added the pdf of the paper here and here’s a link to it as well. Thanks to everyone here that helped give info about the site, especially @deutscheben! Gieser_et_al_2023_Kentiana_5.pdf ***Calling all LaSalle Limestone/Oglesby roadcut fossil hunters!*** If you have collected any shark or fish material from the Oglesby roadcut and would be willing to contribute to science and the growing knowledge of the (severely understudied) Paleozoic vertebrate diversity of Illinois, please contact me! Hobbyist fossil collectors have made some of the best finds in paleontology, and I would love to see what you all have collected from the site. This area’s fish diversity is much higher than is currently known to science and I would like to work on documenting it. Thanks! Email - rgieser2_AT_illinois.edu or you can just contact me on this site as well
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- 15
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- bond formation
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Some of these fossils are so tiny it's really hard to get clear pictures, like #12, these are scattered in several places not much bigger than fishing line, guessing echinoid spines? #7 undecided if these are brachiopods or maybe lungfish teeth? #8 looks like a battle ground, deconstructed echinoid and parts of crinoids? Not sure what to make of all that
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Pennsylvanian fossils in Cretateous creek need a little help!
Lone Hunter posted a topic in Fossil ID
This is my last post for the foreseeable future and want to get an ID on all of these. Found this last summer after big flood churned up creek in Eagle Ford formation, it's not unusual to find imported erosion control rocks with crinoid stems but they're usually big and heavy and harder than concrete so when i saw this small one I grabbed it. I plopped it down on dog bed and took one practice pic (about 10" long #1) then when I picked it up it started to fall apart and I realized it was still wet, never completely cured, still had soft clay. I'm not familiar with rocks out west is this normally how fossils are found there? How did this rock manage to get dug up, loaded, travel at least 50 miles then get dumped and never dry out or get smashed to peices? Pic #2 is what remained after removing all soft parts and drying. Anyway it was a mini fossil hunting trip all in one rock and just wish everything wasn't so tiny! #3 was the prettiest but can't tell if it's a brachiopod or not. #4 Marginfera? #5 brachiopod? #6 columnal I thought would be easy to ID but no. #9 Composita sp? #10 unknown gastropod and crinoid stems. #11 another Composita? I'll do a second post with the rest it's too many pictures.
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- brachiopods
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From the album: Glenshaw Formation Fossils of Western Pennsylvania
Left: CG-0700; Right: CG-0500 Pine Creek Limestone Scale Bar = 1 cm. -
From the album: Glenshaw Formation Fossils of Western Pennsylvania
Scare bar = 5 mm. -
From the album: Glenshaw Formation Fossils of Western Pennsylvania
Scare bar = 5 mm. -
From the album: Glenshaw Formation Fossils of Western Pennsylvania
Scare bar 5 mm. -
From the album: Glenshaw Formation Fossils of Western Pennsylvania
Scale bar = 5 mm -
From the album: Glenshaw Formation Fossils of Western Pennsylvania
Scare bar = 5 mm.
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