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Showing results for tags 'virgilian'.
Found 9 results
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Apographiocrinus sp., Finis Shale, Graham Fm
Mikrogeophagus posted a gallery image in Member Collections
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From the album: Virgilian Series
Apographiocrinus sp., Jacksboro Finis Shale, Graham Fm Feb, 2023 -
Streblochondria aff. stantonensis, Finis Shale, Graham Fm
Mikrogeophagus posted a gallery image in Member Collections
From the album: Virgilian Series
Streblochondria aff. stantonensis, Jacksboro Finis Shale, Graham Fm Feb, 2023 -
aff. Agassizodus corrugatus, Finis Shale, Graham Fm
Mikrogeophagus posted a gallery image in Member Collections
From the album: Virgilian Series
aff. Agassizodus corrugatus, Jacksboro Finis Shale, Graham Fm Feb, 2023 -
Found this on a gravel bar just below boundary to Permian but not sure about source. I had some trouble getting focused photo of edges. I'm thinking possibly algae.
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I found this by the side of gravel road so difficult to say formation, but I'll go with upper Pennsylvanian. I think I'm seeing syringopora in the majority of this rock. There's also a small area that looks like aulopora growing on net-like bryozoan. If you can verify any of this, please do. Thanks.
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I found this a couple of years ago and have periodically taken it out to examine it as I've found the accumulation of fauna adhering to it's surface as very interesting. For awhile I affectionately referred to it as an accretion (as opposed to a concretion), envisioning a clump of mud rolling around in the wave action of a shoreline picking up bits of dead fauna. But now, with the fairly recent posts that have come up about crustacean burrows, I'm second guessing. On the exterior of this piece are brachiopod shell bits and molds, possible pectinid shell molds, crinoid columnals, and tiny gastropod steinkerns and exterior molds with decoration. The dark clumps appear to be pyrite. There are two depression areas, one on the large end, and a smaller one that is offset of the smaller end. These I speculate to be the exposed chamber, should this be a burrow. Notably within these depressions are oval shaped pellets and an interesting fibrous texture. So, I now defer to your opinions! Thank you for looking!
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On my last visit to the Wilson Clay Pit in central Texas I stumbled across this curious piece. It is approximately 6 cm long and 1.5 cm wide. The surface is irregular and rounded. Near one end, an object about 5 millimeters in length, that looks like a brachiopod or pelecypod is attached. The object looks partially buried in the surface of the piece. The piece is below. The scale is in centimeters. Below is a close-up of the attached object... I can see three possibilities. Its geological (matrix) with an attached bivalve (if it is a bivalve). Its an infilled burrow of a bivalve. Or, most enticingly, its a coprolite of a rather large aquatic animal. The Wilson Clay Pit is a well known Paleozoic shark tooth site. I have tried to look up shark coprolites from the Paleozoic, but they seem to have a more regular shape. The 'bivalve' on the side is unlike any of the shells from the locality that I'm familiar with. Could it be undigested remains of something else? Any opinions would be greatly appreciated.
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This is from the Wabaunsee Group (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Late [Virgilian]) Includes: Wood Siding FM, Root Shale, Stotler Limestone (base ST), Pillsbury Shale, Zeandale Limestone (base Z), Willard Shale, Emporia Limestone (base E), Auburn Shale, Bern Limestone (base BR), Scranton Shale, Howard Limestone (base H), and Severy Shale. Found these unknown objects attached to the interior of a myalina clam shell. This is a marine environment but I'm not sure which layer of the Wabaunsee Group this is from. I've never seen this before so would appreciate any help with ID. I'd be happy to furnish more photos of layer and fossil. Thanks
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