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A recent trip to the Madison Group near Yogo, MT turned up a small exposure for Mississippian fossils, mostly small crinoid hash plates but with a few little surprises. I'm still learning about different types of fossiliferous rocks; I believe this was an outcropping of limestone. I tried to locate these fossils in the National Audubon Society's Field Guide to Fossils, but I'd like to get an opinion from someone who knows much more than I do (which, let's be honest, isn't very much ) 01: These were the largest brachiopods I recovered from the site. Perhaps schuchertella? 02: This one straight-up stumped me. At first I thought it was some sort of aquatic plant or coral, but my reference book is pretty limited in plants, and it looks like no corals I've seen. 03: These are very small, but the coloration of this tiny group is what caught my eye. I'm sure the small segments are crinoid, but please correct me if I'm wrong. I have sectioned off a few small fossils in the plate that I'd like to know more about. 03-1 looks plantish, but I had the same issue with this one that I had with 02. 03-2 are so small that I'm not really able to differentiate one mollusc from another. 03-3 is straight-up weird and I have no idea what to make of it. I won't even venture a guess; I just have no clue. A picture of the outcrop. It was small but kept me busy for several hours. Please let me know if I need to upload more pictures. I'm pretty sure I did everything that the multitude of "how-to" posts said to do... Thank you!
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