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Found 460 results

  1. I went on two trips last Thursday and Friday. The first trip lasted approximately four hours and the second was around five and half. I surface scanned about half of the time during the first trip but did not do so at all during the second trip; this was due to some already looking over the places I went on the second trip. On both trips I explored different areas of the streams.
  2. I'm heading across the ditch for a holiday in April and was hoping to spend a couple of days checking out some fossil sites. Anyone got any suggestions? Would love to find some ammonites and trilobites, also any bone fragments.
  3. Couple weeks ago I was able to find a day off to go and look for some dead things...:) Denton is 5 hrs away from Houston but I wanted to go there and explore the surrounding areas, left Houston early, arrive at 11am and spent until 6pm when the sun decided it was enough for me...and then back to Houston. I arrived at midnight happy and tired. A Brown / Reddish Ammo and what I believe is a FAT Nautilus where the best finds of the day. I thought the nautilus was way bigger than the Ammo but both are exactly 8 inches in diameter, however the Nautilus has easily twice the mass. Three in situ pics are shown. I was able to work for 4-5 hrs at HGMS on the Ammo and I show how it looks now.
  4. 8 mile NSR hike trying to get past all the footprints. I had a great day. I found a nice variety of Pleistocene and Cretaceous fossils and all kinds of artifacts. I really like the partial Mosasaur / Pleisosaur scapula with shark feeding marks. The Mastodon tooth enamel has some great color. The Ammonite septum that size is pretty rare for NSR. 2 Mosasaur teeth in one day always makes my day.
  5. Is this ammonite shell?
  6. I bought this ammonite in San luis potosi, Mexico. It comes from the geological formation of Taman. Which is late Tithonian- kimmeridgian in age. This ammonite looks weird!!! Can you'all help me identify the genus.
  7. We we found this in a pile of limestone rubble in our garden. Is it an ammonite? It seems to have a head like a worm so we are struggling to identify it. It is about the size of the palm of a hand. Any help gratefully received.
  8. Hello! I was wondering whether anyone knows of anyone in the UK who will split and prepare a nodule for me? Thanks! Andy
  9. I ordered a couple of caliper stands and one is for this little beauty! This is Hoploscaphites nicoletti. One of the best I have. I now wish I could find a caliper stand that is black in color. I think the shiny brass takes away from the specimen? Also, I just wish you could see the real color this has. The picture doesn't do it justice. RB
  10. Hello! I am not really a fossil collector- or any kind of expert- but I do like to collect natural things I find in various places, and have held on to these for a few years without having an idea if they're really anything at all. I found this forum and would absolutely love some help! Even if there is no identification to be had, it would be great to know if it's still worth holding onto- or... just a rock. The first is a white hard substance with some interesting spiral patterns in it. As you can see in the first photo, the inside chamber of the main form is hollow. I found it on a California beach, probably Pismo?
  11. Hi everyone this is Matt again today I have a white ammonite I got from a friend a few years ago here is a photo of the ammonite I have
  12. This ammonite is about 8 cm, it is from the Turonian - Senonian (-91 to -83 my) of Touraine, France. The ammonites listed in the official geological documents are : Barroisiceras haberfellneri, Romaniceras deveriai and Sphenodiscus requienus. I think this one is a Sphenodiscus but i am not expert enough, so i ask your opinion.
  13. While I was at Quartzite I did buy a few things. I found this at a building that sold mostly Morrocan stuff and was told that this came from there, but I don't believe a thing im told by them. I have done some work on this specimen to make it as best I can, but I have no clue as to what Genus, what species, what formation or anything else for that matter? Any help would be great. Thanks RB
  14. This two fossils were laying for about 1 year in my room and i dont know what i should do with them. The first step would be to know what specimen they are ... I found both in the upper Cretaceous from Gosau (Austria). The first one looks like an heteromorph ammonite but i dont if you can find them in Gosau .... I also found some more ammonites in the matrix ... arent ammonites very rare in Gosau ? Its about 7 cm long ... (maybe there are two ammonites ? I am confused ) And here is the second one ... First i thought that its a coral but i dont think its something like that .... Maybe a rudist ? Its 6.4 cm long and very massive:. Thanks for your help !
  15. This was one of two ammonites I found on the hillside along the Bow River south of Bassano. It was quite weathered and fragmented but after some puzzle work and opticon it turned out not too badly. Lots of red highlights with greens mixed in.
  16. This piece arrived by way of Copper Canyon in Chihuahua, Mexico. Its owner is inquiring if it's an authentic piece and the best way it could get appraised.
  17. 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..............................
  18. I was a bit curious about how they split ammonites, I first had a theory they might pour some sort of resin into it, partly to be able to split it aswell as preservation, before they use a thin saw to split it, then they make it shiny and nice, but I figured that might not work, so maybe anyone here knows
  19. I know this is a long shot, but I was hoping someone could identify these two fossils I know almost nothing about. Back in the 1970s and 1980s, my mother owned a lapidary and rock shop in Southern California. Her customers would sometimes give her samples of rocks and fossils they had dug. I believe that is how she got these. When she retired she packed everything up and moved it to her home. I inherited some of it when she passed away. That’s about all I know of them. The brachiopod looks like it might be a Mucrospirifer sp., but I really don’t have any idea about the ammonite. Perhaps something from the Goniatiida order? I know some of you will want to know the rock formations they came from. I’m not a geologist so I don’t really know. I can only tell you I found them in the Cardboard Box member of the Spare Bedroom formation, within the Old House group. (I thought I might apply to register those names with the USGS Geologic Names Committee).
  20. I've been looking for a lovely SD ammonite for awhile, and I consider them on par with Canadian ammolites. There are a plethora of incredible specimens from Fox Hills Formation, and I settled on a Jeletzkytes as I found their shape appealing. Imagine my delight when I chanced upon a positive + negative! Today, this pair is one of my favorite ammonites. Without the matrix base, it measures roughly 4.6 inches high. Jeletzkytes nebrascensis 70.6 - 66 mya (late Cretaceous) Fox Hills Formation South Dakota, USA
  21. Greetings all, My wife and I were heading back to Altus AFB (where I am currently training), after a weekend away in Dallas. We decided to make a brief detour to Lake Texoma, and the famous "Ammonite Beach." Parking by the dam, we followed the southern coast west for a little over half a mile. We passed a few (what I believe were) fossilized shrimp borrows and a couple of oyster shells. After turning the corner around one of the points, it was quite clear that we had arrived! The location absolutely lived up to its reputation, and we quickly faced a paradox of choice, in terms of which ones to bring back with us. Unfortunately we were only able to spend an hour searching, as we didn't want to contend with the storm system that recently hit the central part of the country during our drive home. All-in-all, it was a very productive trip, considering how briefly we were there. We found a few fragments, and a couple of relatively complete specimens. For one of those, we were able to extract both the fossil and the negative, which is always fun to show to people. I'm hoping that the central portion of the ammonite is present on the far right specimen, but don't want to touch it until I build my fossil prep station (e.g. micro sand blaster, air scribe, etc) after I move up to WA, later this spring. We will definitely be going back once more, prior to departing Oklahoma, to search for that "statement piece" for our collection. That being said, I've also heard that various echinoids can be found in the vicinity as well. I didn't see any, but I honestly didn't spend too much time searching closely for them. If anyone has any recommended sites for echinoids at or near Lake Texoma for a subsequent trip, I would love to hear about it. Cheers! -Nick
  22. A couple of years ago, while on a romp through the Rio Puerco Valley, I found this ammonite. Since then, I have attempted to find a proper i.d. for this specimen through literature and documentation of New Mexico's Late Cretaceous ammonites. With very little luck, the closest resemblance were ammonites in the subfamily Puzosiinae, which are not documented from New Mexico. Today I decided to show the curator and the ammonite researcher at the New Mexico Museum of Natural History and Science. Good news...they did not know what it was! ...pretty exciting. Anyhoo, I have donated it to be studied but figured I would post it here as well. Unknown ammonite from the Late Cretaceous (Cenomanian) Paguate Mbr. of the Dakota Formation - New Mexico, USA. I doubt they'll be jumping on this right after lunch, but I will let ya'll know the results as I do. Happy hunting, -P.