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Last month I made my last trip for the year into Pennsylvania. I was hoping to stop at Swope Quarry in Mapleton, but the site is now posted. With a quick change of plans, I decided to travel even further west and visit some Late Pennsylvanian marine sites that I had planning on visiting on a different trip. The two sites I visited expose the Brush Creek Marine Zone, Glenshaw Formation, Conemaugh Group. They date to the Late Pennsylvanian (Missourian). Fossil collecting at these sites was a lot of fun as the fossils just pop right out of the surrounding shale and can be picked up by hand. But they are very fragile! I felt like Dr. Frankenstein putting some of the fossils back together. I always wanted to add a Worthenia gastropod to my collection so I was really excited to add a couple at one of the sites. By the time I made it to the second site the sun was already going down and I had a long drive home. I ended up bringing back a big block to break down, and I was astonished to find a Metacoceras fragment in it. I apologize in advance for some of the photos. As some may know, the gastropods of the Glenshaw Formation tend to be very small and dark, so it is challenging to photograph them. I used my new digital microscope on some of them. I hope you enjoy! I tried very hard to find a correct identification for everything. If you have a different identification, please let me know. Cephalopods Metacoceras sp. Pseudorthoceras knoxense Brachiopod Neospirifer triplicatus Bivalves Astartella concentrica Solenomya trapezoides Edmondia sp. Edmondia aspenwallensis Coral Stereostylus sp. Trace Worm Burrow Gastropods Worthenia tabulata Strobeus primigenius Euphemites vittatus
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One of my local spots to fossil hunt has a lot of limestone (I think) with what looks like worms running through it. I see this stuff everywhere and have no idea what it is. The area is definitely Glenshaw Formation and has fossiliferous limestone and shale. Any help is appreciated.
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I recently visited an exposure of what is likely the Brush Creek section of the Glenshaw Formation, Conemaugh Group (Late Pennsylvanian) in Western Pennsylvania. I brought home a large block of material that I subsequently broke down. I was excited to find in the block a nice Worthenia tabulata, several smaller gastropods and even a fragment of the nautioid Metacoceras. I also found this large bivalve. I tried to cross reference this fossil against lists of fauna from the Brush Creek and while it strikes me as similar to Edmondia sp., I am not that confident, especially given the size. When searching in the Brush Creek I have typically only ever found the common, small bivalve Astarella concentrica, so this much larger bivalve has me stumped. Any help is greatly appreciated.
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