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Showing results for tags 'cephalopoda'.
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From the album: Fossil Collection: DC Area and Beyond
Cephalopoda Franklin, WV Needmore Formation Middle Devonian- 1 comment
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From the album: Fossil Collection: DC Area and Beyond
Cephalopoda Cumberland, MD Rochester and McKenzie Formations Middle Silurian-
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From the album: Fossil Collection: DC Area and Beyond
Cephalopoda Gore, VA (Gore Grocery) Mahantango Formation Middle Devonian-
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From the album: Fossil Collection: DC Area and Beyond
Cephalopoda Rock County, WI Grand Detour Formation Ordovician-
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From the album: Fossil Collection: DC Area and Beyond
Cephalopoda Maysville Roadcut, KY Kope, Fairview, and Bellevue Formations Ordovician-
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From the album: Fossil Collection: DC Area and Beyond
Cephalopoda Penn Dixie Fossil Park & Nature Preserve, NY Moscow Formation Middle Devonian- 2 comments
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From the album: Fossil Collection: DC Area and Beyond
Cephalopoda Franklin, WV Needmore Formation Middle Devonian-
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From the album: Fossil Collection: DC Area and Beyond
Cephalopoda Gore, VA Mahantango Formation Middle Devonian- 2 comments
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From the album: Fossil Collection: DC Area and Beyond
Cephalopoda Cumberland, MD Rochester and McKenzie Formations Middle Silurian-
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Are these cephalopods in chert? They appear to be agatized as well. The first two pictures are from a chunk of chert and agate that I split to find what looks like the chambers of a nautiloid cephalopod. Is this a fossil or just some way silica forms? Thanks so much!
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The Devonian period is known as "The Age of Fish", but could also be known as "The Age of Brachiopods." In the Early / Lower Devonian, brachiopods reached the height of their diversity towards its end in the Emsian. We see the ancestral groups occurring, lingulids, craniids, orthids, protorthids, pentamerids, rhynchonellids and strophomenids, as well as the later successful groups we have seen before such as atrypids, athyrids and orthotetids, plus the rise of spiriferids, spiriferinids and productids and the beginning of the terebratulids. By the end of the Devonian , several of these groups are extinct or severely reduced in importance and brachiopods never quite recover. Also, the Devonian is the last time we see trilobites with such variation, large sizes and numbers and orthocerids too are much more uncommon after the rise of the goniatites. The massive tabulate coral reefs also disappear after the Devonian. Fascinating period and I hope to share some of its wonders with you. Equally, a lot of this is rather new to me, so I would be very grateful for any assistance, corrections or further information on my specimens. Thank you. The Early Devonian epoch is split into three stages, so let's start with the first of those, the Lochkovian, that began about 419 mya and finished roughly 411 mya. I have been sent a nice selection of brachiopods from the Kalkberg Formation, Helderberg Group by the Mighty @Misha, mostly. But the kind gentleperson also sent me this fascinating little bryozoan hash : It is dominated by fenestellids, which is usually the case in the Devonian, but other orders sill occur. These ones, I think, are Fenestella, but there are so many species in the formation that I wont take a guess as to species : Not sure what this one is ;
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- cordillera cantabrica
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From the album: My collection in progress
Parkinsonia pachypleura Buckman 1925 Location: Saint-Benin-d'Azy, Bourgone-Franche-Comté, France Age: 168 - 166 Mya (Batonian, Middle Jurassic) Measurements: 4,2 cm (diameter) Kingdom: Animalia Phylum: Mollusca Subphylum: Conchifera Class: Cephalopoda Subclass: Ammonoidea Order: Ammonitida Suborder: Ammonitina Family: Parkinsoniidae -
From the album: My collection in progress
Cleoniceras sp. Parona & Bonnarelli 1895 Location: Atsimo-Andrefana, Madagascar Age: 157 - 155 Mya (Oxfordian, Upper Jurassic) Measurements: 4,5 cm (diameter) Kingdom: Animalia Phylum: Mollusca Subphylum: Conchifera Class: Cephalopoda Subclass: Ammonoidea Order: Ammonitida Suborder: Ammonitina Family: Hoplitidae The ammonite is iridescent. In some parts is visible the elaborate ammonitic suture pattern. -
From the album: My collection in progress
Manticoceras sinuosum Hall 1843 Location: Erfoud, Morocco Age: 383 - 359 Mya (Upper Devonian) Measurements: 7,2 cm (diameter) Kingdom: Animalia Phylum: Mollusca Subphylum: Conchifera Class: Cephalopoda Subclass: Ammonoidea Order: Agoniatitida Suborder: Gephuroceratina Family: Gephuroceratidae -
From the album: Bertie Group fossils
An uncommon cephalopod from the Fiddlers Green Formation Collected on 5/13/2022© Owen Yonkin 2022
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Just a note that James Cullison's 1944 monograph on the rocks and fauna of the upper Lower Ordovician of Missouri and Arkansas is now freely available for download or perusal at https://archive.org/details/paper-cullison-1944-the-stratigraphy-of-some-lower-ordovician-formations-of-the This publication has always been devilishly tough to get a hold of. A nice systematic paleontology section deals with the many gastropods and other mollusks as well as the less diverse brachiopods, trilobites, and sponges. The monograph covers the following formations as currently accepted in Missouri: • Smithville Formation • Powell Formation • Cotter Formation • Jefferson City Formation Enjoy and share as you like. Full citation: J. S. Cullison, 1944: "The Stratigraphy Of Some Lower Ordovician Formations Of The Ozark Uplift." The University of Missouri School of Mines and Metallurgy Bulletin Technical Series, Vol. 15, No. 2, 112 pp + 35 pl.
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- invertebrata
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A friend uncovered this oddball today in the Late Ordovician (Sandbian) of eastern Missouri, in the uppermost part of the Plattin Group (a Platteville equivalent) or possibly the lowermost part of the Decorah Group. He's been finding a lot of weird fossils in that zone, including articulated cyclocystoids, but this one I'm at a loss on. Too wobbly for an orthoconic cephalopod, too much space between calcite elements for a crinoid column. Given the size, is machaeridian a possibility? What other ideas should we be considering?
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Hi I've been gifted a plate with different ammonites in it. As it comes from a second hand store, there's no record for provenance,age and all other infos. I'd appreciate any help with the identification. Thanks Back of plate:
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- identification
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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
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- biostratigraphy
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Hello, I am a new user and I recently picked up this ammonite fossil at a local rock & fossil shop. I got it for $80, and it has not been worked on much, only one side has been mostly cleared of rock. I have tried to use various sources on the internet and galleries, but I am new to this and have not been able to identify this fossil myself. It is decently large, and about 8-9 inches across at its longest. There are lots of deep ridges in the shell, but each ridge as far as I can tell is uniform, with no protrusions. Unfortunately, I do not know the origin of this fossil, or the type of rock it is in, though it seems to be very soft and break easily. I can provide more information and/or photos as requested. Thanks!
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I was seven miles south of Glendive; Montana on October 12, 2018; time 1400; exploring a drainage cut into the Pierre Shale Formation while looking for concretions. This scaphites was partly exposed on the surface of a concretion. Later, I removed most of the surrounding matrix.