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Showing results for tags 'pennsylvanian'.
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Amniote tetrapods documented in two Pennsylvanian Grand Canyon trackways
Oxytropidoceras posted a topic in Fossil News
Discovered fossil tracks determined to be oldest known in Grand Canyon National Park ABC, Channel 15 News, Arizona The open access paper is: Rowland, S.M., Caputo, M.V., and Jensen, Z.A., 2020. Early adaptation to eolian sand dunes by basal amniotes is documented in two Pennsylvanian Grand Canyon trackways. PLoS ONE 15(8): e0237636. A related paper is: Francischini, H., Lucas, S.G., Voigt, S., Marchetti, L., Santucci, V.L., Knight, C.L., Wood, J.R., Dentzien-Dias, P. and Schultz, C.L., 2020. On the ;presence of Ichniotherium in the Coconino Sandstone (Cisuralian) of the Grand Canyon and remarks on the occupation of deserts by non-amniote tetrapods. PalZ, 94(1), pp.207-225. Yours, Paul H. -
I recently collected this piece with these two articulated fossils at an exposure of the Llewellyn Formation in Pennsylvania. They are respectively 14cm and 16cm in length. Based on an image in a book I initially thought they were Lepidostrobus (the cone of Lepidodendron) but now I am having my doubts. Examples of Lepidostrobus that I have seen on the Internet include the scales that come off the cone and these fossils clearly do not have these scales. On the other hand, these fossils have the typical diamond pattern that is characteristic of the bark of Lepidodendron, leading me to believe that these are examples of its branches. Yet they don't really look very branch-like with how thin they are and how much they bend. Does anyone know what these could be? Any help would be greatly appreciated.
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Hello! and I hope you are having a wonderful afternoon! I found these two plant fossils and was unsure to what they might actually be. They look a lot like modern seeds but I know I am not always informed and I keep having a slight suspicion they could be apart of some other plant material! If anyone could help identify and confirm these plant fossils I would be very grateful! I have found leaves from Neuropteris sp , Cyclopteris sp, and a few other plant species in these types of limestone! Info that I could gather: Location: Missouri Time period: Pennsylvanian Formation: Possibly Upper Winterset Limestone Specimen #1: Two halves of one seed? (roughly 9mm) Other half: Specimen #2: Larger and wider seed? (roughly 3mm) I unfortunately do not have the other half to this one!
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From the album: Missouri Plant Fossils
The leaf section of the specimen is 3.6cm wide and length is 3.3cm long! -
From the album: Missouri Plant Fossils
This specimen is roughly 5.3Cm! -
From the album: Missouri Plant Fossils
Large Leaf with a few smaller leaf imprints from Alethopteris, sp -
Hello! I have found a few ferns at a road-cut and was wondering if anyone could identify these ferns below! I have found trilobites (small), Neuropteris fern leaves, many Calamites, and ocean invertebrates in the area. I was very lucky to find these plant fossils as they appear to be relatively uncommon in the road cut area! Specimen #1: I found this lovely leaf with a few imprints of fern fossil right next to it! (3.5cm) Specimen #2: A lovely... Ginkgo? I had posted this previously on a different website and noted it looked like a Gingko. I was not sure as the leaf has a more rounded edge and not a split edge like the Ginkgo I saw online Nevertheless it could be a squished Ginkgo or a related species! Specimen #3: A lovely leaf and one of my largest that I was able to find (5.3cm) Specimen #4: A beautiful fern fossil leaf (3.4cm) Some general information I was able to gather from the area! Time period: Pennsylvanian Location: Missouri Formation: Upper Winterset Limestone Thanks to Missourian For the possible Formation ID
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From the album: Missouri Plant Fossils
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From the album: Missouri Plant Fossils
One of many calamite fossils I have found -
From the album: Missouri Plant Fossils
One of my favorite Calamites due to how well preserved its internal anatomy is! I gave this to a friend's little brother who loves fossils. -
I found this fossil in the north attleboro part of the rhode island formation, and I need help with an ID. It’s just shy of an inch in length.
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Well, it's hot in Texas in August. 107 is the forecast for Saturday. Soooo...I'm hunting at home! Still having fun with the micro matrix stuff! This time, it's from Mineral Wells, TX. While i have been there a variety of times and found lots of great stuff, I never looked quite THIS close to find fossils! So a pound of washed matrix and my microscope camera landed me a few neat things. I was hoping for a whole Trilobite (which I have found three small ones at Mineral Wells) no full trilos this time, but some trilo bits! But my favorite things are the Crinoid parts...the geometric architectural elements of crinoids simply amaze me. So here are my favorite Mineral Wells Minis. All of these are 1/8 inch and smaller. Echinoid Plates and Spines: (Big one is 1/8 inch) Trilobite Bits: Crinoid fragments (stems, calyx, bulb, and arm structures) I am simply amazed by the geometry of these! And a couple of tiny gastropods: I"m not completely sure what this is...I assume a bit of crinoid, but it has a different texture than the others.
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From the album: Muncie Creek Shale Phosphatic Nodules
Got lucky and found this while cracking open phosphatic nodules! -
From the album: Chondrichthyan Teeth From The Pennsylvanian Period
A few Petalodus teeth fragments I have found -
Multiple Phosphatic Nodules from Muncie Creek Shale that I could not Identify ( Missouri )
Samurai posted a topic in Fossil ID
Location: Missouri Time period: Pennsylvanian Formation: Muncie Creek Shale Specimen 1: Fish Coprolite? 1.8cm (nodule size) Specimen 2: Coprolite? 2cm (nodule size) Specimen 3: Fish Mandible? (2.6cm) Specimen 4: Coprolite or Maybe Braincase (I think it is very unlikely that it is) 2.8cm Nodule size 1.5cm (fossil size) Specimen 5: (2.9cm) Note: The placement of the fossilized material might be wrong as this was one of my first nodules and the fossilized material fell out. I recovered what I could. (Opened roughly 2 months ago) Specimen 6: Tessellated Cartilage with some Skin impressions ? (2.5cm) Specimine 7: Fish material? Thank you for reading and viewing this, I hope I can better understand these images so I can use them as references in the future!
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A couple weeks ago I met with a retired paleontologist that specializes in Pennsylvanian cephalopods. I showed him all my finds from a certain site here in NE Oklahoma and he was kind of surprised with what I had found (and wasn’t finding). There were a couple common goniatites and nautiloids, a few uncommon ones and five specimens of one type of goniatite he didn’t recognize. He checked his book and still couldn’t match a suture pattern and told me it may be an undescribed species. He noted down the pattern and said he was going to double check, but if it ends up being the case, he would potentially try and get it written up. So, my question is, for those of you who have been through this before or do it for a living, what all does describing a new species entail?
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Unsure where to start with this bizarre Concretion fossil! ( Missouri )
Samurai posted a topic in Fossil ID
Location: Missouri Geological time period: Pennsylvanian Formation: Muncie creek shale I believe it is some sort of cartilage or fish material but I honestly have no clue.
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From the album: Chondrichthyan Teeth From The Pennsylvanian Period
Specimen is 7mm in size. I was told this could be Hamiltonichthys after posting it to fossilId -
From the album: Chondrichthyan Teeth From The Pennsylvanian Period
I assumed due to there being multiple guesses on the fossilId section and this one best fit the description It is roughly 7mm in size It could also be a juvenile of a Petalodont but that is my theory -
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From the album: Chondrichthyan Teeth From The Pennsylvanian Period
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From the album: Chondrichthyan Teeth From The Pennsylvanian Period
I believe this to be a Caseodus tooth but if this is the wrong, possible id's are welcomed! -
From the album: Chondrichthyan Teeth From The Pennsylvanian Period
Any Id's or corrections are welcomed! Correct id by Jackson g -
From the album: Chondrichthyan Teeth From The Pennsylvanian Period
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I know some of you find very complete nautiloids that are much larger but here in Texas they are often smaller and fragmentary, though the pieces can be well preserved and easy to extract from the loose shale of the Graham Formation at Jacksboro Texas. I had many fragments separated into boxes labeled "Pseudorthoceras" and "Mooreoceras" for smaller and larger segments respectively. Then I saw a paper that invalidated the latter genus, Revision of Some Common Carboniferous Genera of North American Orthocerid Nautiloids, Kröger & Mapes 2005, which made all of my specimens Pseudorthoceras knoxenses. This got me wondering what these creatures might have looked like whole so I started to gather a few fragments that might fit together in a continuous shell, including a piece with the protoconch and one with part of the body chamber. The result had one empty space which I filled with a clay reconstruction, then made a plaster mold from which I poured a plaster cast to fill the gap. I used super glue to hold everything together so I could take it apart with acetone if I wanted too. It may make a good display fossil for our table at local events though so I'll probably donate it to the Dallas Paleontological Society. The second section from the large end is the fake part. The rest are all genuine fossils from the same site but collected over several years, so not even considered to be associated. I'm pretty sure they are all the same species though. The whole thing is 38cm long and came out fairly straight considering what I had to work with..
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Anyone seen this species or similar? Found in Pennsylvanian spoil piles of central Illinois (near Peoria). Is it part of some kind of alga? Not my find and not my specimen, so these photos are basically what we have to go on. More broadly, can anyone here recommend a Treatise-style taxonomic book detailing known algal heads / macroalgae in the fossil record? Thanks.
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