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Showing results for tags 'Lower Devonian'.
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From the album: Fossildude's Lower Devonian Fossils
Likely Synphoria stemmata. Lower Devonian, Glenerie Limestone Tristates Group Route 9W road cut, Glenerie, NY.© 2022 T. Jones
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Could not find this one in the usual sources. Thanks, Gordon
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From the album: Fossildude's Purchased/Gift Fossils
Zascinaspis heintzi - Another ventral shield Lower Devonian deposits of Volyno - Podillya, Ukraine Location: Nyrkiv, Zalischyky raion, Ternopil oblast Era: Paleozoic Period: Devonian Stage: Lochkovian Regional strata: Ustechko stage and lower part of Khmeleva stage, Dniester formation Age 420 million years© 2020 T. Jones
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From the album: Fossildude's Purchased/Gift Fossils
Zascinaspis heintzi Lower Devonian deposits of Volyno - Podillya, Ukraine Location Nyrkiv, Zalischyky raion, Ternopil oblast Era Paleozoic Period Devonian Stage Lochkovian Regional strata Ustechko stage and lower part of Khmeleva stage, Dniester formation - Age 420 million years© 2020 T. Jones
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Details of two Rhinopteraspid Fish's Ventral Preoral Regions
Biotalker posted a topic in General Fossil Discussion
I thought I would share this recent fossil purchase. I was fortunate to obtain this fossil from the lower Devonian in the southwestern region (Podolia) of Ukraine. Two ventral snout regions of type of heterostracan (jawless) fish called rhinopteraspid are exposed. The bone detail is simply remarkable. There is “tiling” of the underside of the long (rhino) snouts with dentine and/or aspidine (acellular enamel-like substance) in parallel lines arrays with a more uniform bone matrix underneath. The pre-oral-plate is angled in toward the mouth and displays many external textures of bone that presumably aided the fish’s feeding. I didn't expect to see this level of detail.
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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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From the album: Fossildude's Lower Devonian Fossils
Tentaculites (preserved in silica) Lower Devonian, Glenerie Limestone Tristates Group Route 9W road cut, Glenerie, NY. 2.7 cm.© 2022 T. Jones
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On Tuesday this week, myself and some of my family spontaneously decided to get out and drive to some interesting places in New York state to enjoy the day. We visited some beautiful locations like these two waterfalls: On our journey, we ended up around Gilboa, which is the location where one of the earliest known fossil forests was discovered with amazing plant and animal life, some of these fossils are exhibited outside near the town hall. This, being one of the many locations I had wanted to visit for years, was an opportunity I could not pass up, so while driving through the town we stopped by to take a look at these amazing pieces of history and get a few pictures: These are just some of the fossils displayed there, I have also really wanted to get to fossil hunt for some of the plant remains from this formation in Schohaire creek nearby, but unfortunately due to the very spontaneous nature of all of this I was not ready with the locations I had noted down where we could have done so and I did not get to collect anything from there on that day. We did, however, still have a little bit of time before it would get dark and I made the suggestion that we go collect some fossils at another, familiar location as it isn't often that I get to be around these places. So that is what we did, setting out for a quick hunt in the lower Devonian Kalkberg formation at a site only around 30 minutes away. Overall we probably got to hunt for around an hour, but it was a surprisingly productive time. Last time I visited here, I wasn't able to find that many of certain organisms I was interested in like the beautiful Leptaena sp. but this time, we found an abundance of these fossils, along with many other nice specimens. Here are some of my favorite finds from the trip: A few of those Leptaena sp. I wanted to get This one was my favorite, not the most complete but quite large and has very nice surface detail. A small but detailed spiriferid with some nice bryozoa: The largest spiriferid I've found here, needs some prep but a very nice fossil still: This one was a big surprise for me, I kept it because of the nice spiriferid on there but upon getting home I noticed a shiny dark patch below, turns out it was a Linguliform brachiopod, something I had never seen from the formation before. It's not complete, I wish we had noticed while we were there and potentially found the other side, but this is still a find I am very excited about. This also made me wonder something, most brachiopods preserve with a matte, sometimes slightly shiny texture to their shell, while all of the Linguliforms I have seen have a very glossy surface to them. Is this difference caused by differing shell composition? It is quite interesting and something that seems to occur throughout geological time, in many formations with varying preservation. @Tidgy's Dad maybe you know something about this? Some pretty nice orthids: This one was quite big, and appears pretty complete, I would like to get it prepped some day, I think it may turn out quite nice: Another strophomenid similar to Leptaena but with much shallower rippling along its surface, I was wondering if this may be another genus, looking in my field guide I see that Strophonella and Rystistrophia both also have concentric wrinkles, although I am not sure which if any of them this one may be: A coral? not really sure what this branching fossil is, but it seems quite interesting, not anything I've seen here before. A pair of nice solitary rugose corals: This one doesn't show up too well on camera but it's a pretty large platyceratid gastropod, I have a few from this location but this one has some very interesting wrinkles to the shell, quite different from all my other ones. This is another large fossil, I think it may be a gastropod also? it has a similar dark shell to most of the gastropods I've found here, plus it seems like it may be curving in a helical pattern out of the matrix slightly, but I may be wrong. And to finish, here are some nice hashplates I collected from the site: Thanks for looking!
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L.S., Hope someone on TFF can help me with the identification of a plant fragment from the Lower Devonian (Pragian) of the Belgian Ardennes. The specimen in question consists of a 17 mm-long, 12 mm-wide oval-shaped body, which is seemingly covered in equant scales (though this could also be an artefact of the surface preservation) and has curved spine-like protrusions (see right hand-side of specimen in first two photographs). The detailed structure of the specimen is quite difficult to capture, so I added four photographs taken under different lighting conditions. Hope this is enough to showcase the main features. To my eye, the overall texture and "spines" do resemble those of Drepanophycus-like stems, which have been observed at the locality. However, I find it difficult to explain the oval-shape of this structure in terms of a stem fragment. This rounded shape gives it an almost strobilar appearance. The specimen is associated with long, naked axes having a smooth surface, present in the same slab of rock, but not in organic connection. Other floral elements encountered at the locality mainly include zosterophyllopsids. Are you aware of any scaled strobilar structures from the worldwide Lower Devonian to which I could compare my Belgian find? Or do you think this specimen should be interpreted as a (rounded) stem fragment? I'm really struggling with this one, so I would love to hear your thoughts! Kind regards, Tim
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I found this plant material in Union Springs, NY...at the conjuntion of Lower Devonian/Upper Silurian. Along with this was found...ugh, can't remember the name. Remind me of bean sprouts...I think starts with a "C". Is there enough to identify? Thanks Greg
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From the album: Fossildude's Lower Devonian Fossils
Platyceras nodosum. Lower Devonian Glenerie Limestone Tristates Group Glenerie, NY.© 2021 Tim Jones
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Dalmanitid pygidium from the Coeymans Formation
Nautiloid posted a gallery image in Member Collections
From the album: Lower Devonian Helderberg Group in Eastern NY
Dalmanitid pygidium, possibly Odontochile micrurus Lower Devonian Helderberg Group Coeymans Formation© Owen Yonkin 2021
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Hello all! I’ve been going through some of my fossils from the New Scotland Formation and I stumbled upon this intriguing little piece. It’s about a centimeter wide and seems to be separated in the middle, almost like two connected plates of some kind. I’ve got a decent collection from this formation and I’ve never seen anything like this. Hopefully somebody on here can help me out. Thanks for looking!!
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From the album: Trilobites
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Hello everyone! I have recently purchased this skull roof from an actinolepid placoderm from the lower Devonian of Ukraine, The fossil was labelled as Kujdanowiaspis, but there is also a closely related genus found there called Erikaspis. I have been looking at several papers to try and see what distinguishes the two and if it is possible to tell what mine is but right now I am not sure. Any help identifying the genus and even species if possible would be great, Thank you
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I've found this Brachiopod but having a difficult time trying to identify it. It looks like "Anastrophia verneuili". However, I found it above the Lower Devonian which it is supposed to come from.
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From the album: Lower Devonian Helderberg Group in Eastern NY
Kosovopeltis pompilius Lower Devonian Helderberg Gr. Kalkberg Fm. Rickard Hill Roadcut Schoharie, New York Collected 5/31/20 -
Rhynchonellid brachiopod from the Kalkberg Formation
Nautiloid posted a gallery image in Member Collections
From the album: Lower Devonian Helderberg Group in Eastern NY
Ancillotoechia acutiplicata Lower Devonian Helderberg Gr. Kalkberg Fm. Rickard Hill Roadcut Schoharie, New York Collected 5/31/20 -
Spiriferid brachiopod from the Kalkberg Formation
Nautiloid posted a gallery image in Member Collections
From the album: Lower Devonian Helderberg Group in Eastern NY
Howellella cycloptera Lower Devonian Helderberg Gr. Kalkberg Fm. Rickard Hill Roadcut Schoharie, New York Collected 5/31/20 -
From the album: Lower Devonian Helderberg Group in Eastern NY
Meristella princeps Lower Devonian Helderberg Gr. Kalkberg Fm. Rickard Hill Roadcut Schoharie, New York Collected 5/31/20 -
Orthid brachiopod from the Kalkberg Formation
Nautiloid posted a gallery image in Member Collections
From the album: Lower Devonian Helderberg Group in Eastern NY
Discomyorthis oblata Lower Devonian Helderberg Gr. Kalkberg Fm. Rickard Hill Roadcut Schoharie, New York Collected 5/31/20 -
From the album: Lower Devonian Helderberg Group in Eastern NY
Platyceras spirale Lower Devonian Helderberg Gr. Kalkberg Fm. Rickard Hill Roadcut Schoharie, New York Collected 5/31/20 -
Gastropods: Diaphorostoma depressum Platyceras spirale? Tremanotus profundus (very flattened specimen).
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I know this trip happened a while ago, but I’ve been pretty busy as of late finishing up the school year and such and haven’t had a chance to make a trip report. Hopefully y’all find this interesting.
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