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Showing results for tags 'pelecypoda'.
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Request for a published plate from Palaeontographica Americana
pefty posted a topic in Questions & Answers
Hi, I am in search of Plate 8 from the following paper. Yes, the paper is published online at Biodiversity Heritage Library, but both Plate 8 and its accompanying "Explanation" (i.e., captions) page are unfortunately missing from the online edition. Please post a scan if you have easy access to Plate 8 from this paper, thanks. Driscoll, E. G. 1965. Dimyarian Pelecypods of the Mississippian Marshall Sandstone of Michigan. Palaeontographica Americana, No. 35.- 2 replies
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- bivalvia
- invertebrates
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Came across this specimen on an Ohio Fossils group. It was apparently found in south-central Ohio (Serpent Mound area) in 1958. What’s bothering me is that it seems to be a marine pelecypod with aragonitic preservation. All of Ohio’s exposed rocks are either Paleozoic or Pleistocene, and with vanishingly few exceptions, Paleozoic aragonite is simply not preserved. I know there are mollusks in pleistocene marine concretions, notably from Newfoundland, but not in the sediments representing Pleistocene Ohio’s terrestrial&freshwater environments. This is a marine clam, and there was no marine environment in pleistocene Ohio. Nor were there marine environments producing concretionary fossils in any nearby source area for glacial debris that ended up in Ohio, as far as I am aware. Nor in any of the Ohio River’s past source areas to the south during the Pleistocene. So....is this concretion then an object moved long distances by ancient humans? Does anyone recognize the concretion as similar to ones they’ve seen in some particular Formation? Or am I way off in terms of my preservational logic? Original post: “I collected this 60+ years ago from a tributary stream to the Miami River in SW Ohio - what is it and how old? Opinions please!”
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- cretaceous
- mollusca
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Help request! I am putting together a tool for judging rock age based on very crude, whole-rock, hand-sample observations of fossil faunas/floras -- the types of observations a child or beginner could successfully make. I view this as a complement to the very fine, species-level identifications commonly employed as index fossils for individual stages, biozones, etc. Attached is what I've got so far, but I can clearly use help with corals, mollusks, plants, vertebrates, ichnofossils, and the post-Paleozoic In the attached file, vibrant orange indicates times in earth history to commonly observe the item of interest; paler orange indicates times in earth history to less commonly observe the item of interest. White indicates very little to no practical probability of observing the item of interest. Please keep in mind that the listed indicators are things like “conspicuous horn corals,” purposefully declining to address rare encounters with groups of low preservation potential, low recognizability, etc. Got additions/amendments, especially for the groups mentioned above? Toss them in the comments below! Thank you..... https://docs.google.com/spreadsheets/d/1tVm_u6v573V4NACrdebb_1OsBEAz60dS1m4pCTckgyA
- 5 replies
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- algae
- ammonoidea
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- algae
- ammonoidea
- arthropoda
- biostratigraphy
- brachiopoda
- bryozoa
- cambrian
- carboniferous
- cephalopoda
- chitinozoa
- chondrichthyes
- cnidaria
- cretaceous
- crinoidea
- crustacea
- devonian
- diatoms
- echinodermata
- echinoid
- eocene
- fish
- foraminifera
- gastropoda
- ichnology
- invertebrates
- jurassic
- microfossils
- miocene
- mississippian
- mollusca
- neogene
- oligocene
- ordovician
- ostracoda
- paleocene
- paleogene
- pelecypoda
- pennsylvanian
- permian
- plants
- pleistocene
- pliocene
- radiolaria
- sharks
- silurian
- tetrapoda
- triassic
- trilobita
- vertebrates
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Hi, I come here because I need some help. I just collected samples for my thesis and I´ve just realized that my samples are sandstones with many mollusca fossils. My problem here is that, I dont know how to extract the fossils without destroying them. Please help me, I need this so much, and I cant find anything about dissolving sandstones. Greetings From Monterrey, México.
- 10 replies
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- ammonite
- pelecypoda
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