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Showing results for tags 'mollusk'.
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From the album: Hell Creek Formation Microsite
A remarkably well-preserved freshwater gastropod. -
From the album: Hell Creek Formation Microsite
Unionoid mussels are very common in this riverine deposit. They preserve the original nacre and are iridescent. Because they are so fragile, and given they were preserved in a river, they are never complete. -
The following were found in Sarasota County, Florida (USA) on public land eroding out of berms. They appear to be plio/pleistocene. Using the forum and several books, I've ID'd the best that I can. I'm looking to confirm the ID's. Any and all assistance is appreciated. 1. Turritella acropora 2. Arca wagneriana 3. Eucrassatella speciosa 4. Terebra dislocata 5. Carditamera floridana or arata 6. Terebra aclinica 7. Cantharus multagulus 8. Anadara brasiliana 9. Strombus floridanus 10. Unknown Strombus
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From the album: Fossil Collection: DC Area and Beyond
Cucullaea gigantea Henson Creek, MD Aquia Formation Paleocene -
Preservation of colour in fossil shells
pachy-pleuro-whatnot-odon posted a topic in Questions & Answers
Hi all, Some time ago I found this shell in (what I believe to be) the French Upper Muschelkalk (Triassic). Now I'm not into shells myself, but to judge from the remains of operculum on the underside of it, the specimen concerns an oyster. Most strikingly, however, the shell has a pattern of darker-coloured lines that do not correspond to any three-dimensional/elevational differences on the shell surface - which is, in fact, entirely flat. I haven't seen this on a fossil shell before. Now when doing a Google search for my response on whether it would be possible for crustacean carapaces to retain traces of their original colour, I bumped into an article that described that molluscs may incorporate melanin in the calcite of their shells to create the colour patterns we see (e.g., here). This got me wondering: could the lines I'm seeing indeed be traces of the original melanin pigmentation of this shell? And, if so, how common is this phenomenon? Does anybody else have examples of such shells? I'd also be very happy if someone could furnish me with a genus or species name to go with my specimen. But here I'd like to primarily raise the topic of ancient colour reconstruction in shells.
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Hello everyone, I was just walking the beach on the Adriatic coast in Croatia and I found this rock with a seashell imprint inside, I am wondering could this possibly be a fossil or just a regular part of a seashell, it still has parts of shell in it. The rock I thinks is limestone which is the most common here. I appreciate your answers.
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From the album: Fossil Collection: DC Area and Beyond
Pleurodictyum sp., Bivalve Impression Deer Lake Tavern, PA Mahantango Formation Middle Devonian -
From the album: Fossil Collection: DC Area and Beyond
Conus deluvianus Aurora Fossil Museum, NC Pungo River and Yorktown Formations Miocene -
From the album: Fossil Collection: DC Area and Beyond
Typhis acuticosta Aurora Fossil Museum, NC Pungo River and Yorktown Formations Miocene -
From the album: Fossil Collection: DC Area and Beyond
Lemintina granifera Aurora Fossil Museum, NC Pungo River and Yorktown Formations Miocene -
From the album: Fossil Collection: DC Area and Beyond
Ammonoidea Capon Lake, WV Needmore Formation Middle Devonian -
From the album: Fossil Collection: DC Area and Beyond
Pleuroceras sp. Forcheim, Germany Unknown Jurassic -
From the album: Fossil Collection: DC Area and Beyond
Macrocallista marylandica Matoaka Beach Cabins, MD Choptank and St. Mary's Formations Miocene -
From the album: Fossil Collection: DC Area and Beyond
Ecphora sp. Matoaka Beach Cabins, MD Choptank and St. Mary's Formations Miocene -
From the album: Fossil Collection: DC Area and Beyond
Turritella plebia Matoaka Beach Cabins, MD Choptank and St. Mary's Formations Miocene -
From the album: Fossil Collection: DC Area and Beyond
Mercenaria cuneata Matoaka Beach Cabins, MD Choptank and St. Mary's Formations Miocene -
Found this in a cliff side in Colorado I am not sure but it looks like a mollusk or Crinoid bulb, DINOSAUR EGG!😆 Thanks!
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Well, I’m stumped. Can’t find anything like it in my references. Was found in KC area, likely Pennsylvanian. Thank you so much in advance everyone!
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I don’t find these too often, and rarely can they be extracted in a way that looks good (in my limited experience), but these two were found as shown already separated on all sides. The bigger one is REALLY big compared to those I usually find. I placed a smaller one found in the same spot right next to it for comparison. I tried to use Lance Halls northtexasfossils site to find something similar and there’s a Pennsylvanian specimen that sort of looks similar, but many of his pics aren’t loading properly so I don’t know if I overlooked a likely candidate. Any ideas? This is Tarrant county TX, a spot where I can find exposure of kiamichi clay and Fort Worth formation as well as duck creek.
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From the album: Ordovician Fossils
Taxonomy Phylum: Mollusca Class: Gastropoda Subclass: Orthogastropoda Order: Murchisoniina Family: Hormotomidae Genus: Hormotoma Species: ? Author: Salter, 1859 Geology Eon: Phanerozoic Era: Paleozoic Period: Ordovician Epoch: Late Stratigraphy Series: Upper Ordovician Stage: Katian Series: Cincinnatian Stage: Richmondian Sequence: C5 Unit: ? Provenance Collector: mtz Date: 07/23/023 Location: SW Ohio© mtz
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Well I yesterday I drove to one of the Keasey outcrops here in Oregon (the one with the Cold Seep). You cannot dig here in Oregon without a permit or landowners permission, so I hunt the talus along the road. Yesterday I picked up about 25 specimens. Interestingly, many were weathered out and among my largest finds. The mollusk (some shell present but mostly a cast from the shell as mold) measures 66mm on the long dimension and the gastropod 34mm across. The mollusk on the right is the average size I find in the Keasey formation. Both the Mollusk and gastropod are significantly larger than my normal talus finds. I don't know if this is because of the Cold Seep or just the particular set of finds. I do find lots of shells showing predation like the small one on the right. Any it was a fun day looking through the talus and well worth the trip.
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Hello everyone, just trying to get species names if anyone knows. I know that 1 and 3 are from Yorkshire, England. I don’t know the location of any of the other species unfortunately. Thank you.
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Looking for help identifying any of these fossilized shells and internal casts. All found in southeast Florida, Broward/ Miami-Dade counties [Pleistocene Miami Limestone/Oolite]. Maybe a few found more westward in the Tamiami Formation [Pliocene/ Miocene Limestone] Thanks. Fossil Shells.pdf
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I found these Devonian bivalves (?) at the Milwaukee formation at estabrooke park in Milwaukee Wisconsin. I think the first one could be a bivalved arthropod like an ostracod and the second could be part of a brachiopod. Any help is appreciated! Thanks. Sorry for lack of scale! I just put one in my rockhounding bag.
