MarcoSr Posted April 5, 2023 Share Posted April 5, 2023 7 hours ago, JBkansas said: Here's a thread suggesting they're turtles from Madagascar: When I asked a friend a while back who has written a number of papers on fossil turtles from the MD/VA area about the Madagascar specimens, he stated that he seriously doubted the Madagascar specimens were turtle coprolites. Turtle excrement is very soft and almost liquid as I saw first hand from pet turtles that I owned as a kid. Marco Sr. 3 1 "Any day that you can fossil hunt is a great day." My family fossil website Some Of My Shark, Ray, Fish And Other Micros My Extant Shark Jaw Collection Link to comment Share on other sites More sharing options...
GeschWhat Posted April 5, 2023 Author Share Posted April 5, 2023 13 hours ago, JBkansas said: @GeschWhat I think I remember you posting that there isn't any evidence the "agatized coprolites" from the Morrison formation popular online are true coprolites. Just wanted to confirm because I can't find that previous post. Found this: https://pure.port.ac.uk/ws/portalfiles/portal/13075050/_Barling_2018_PhD_Thesis.pdf I agree with this. I have a small handful that may have bone inclusions. I’ve had discussions with a number of experts in the field. No one has been able to find definitive proof. General rule: if there aren’t identifiable inclusions or backfilled burrows, they probably aren’t coprolites. That said, I continue to look for legitimate Morrison Formation (or other siliceous) coprolites. What I have found is dubious at best. 3 Lori www.areallycrappystory.com/fossils www.facebook.com/fossilpoo Link to comment Share on other sites More sharing options...
MarcoSr Posted April 6, 2023 Share Posted April 6, 2023 19 hours ago, GeschWhat said: I agree with this. I have a small handful that may have bone inclusions. I’ve had discussions with a number of experts in the field. No one has been able to find definitive proof. General rule: if there aren’t identifiable inclusions or backfilled burrows, they probably aren’t coprolites. That said, I continue to look for legitimate Morrison Formation (or other siliceous) coprolites. What I have found is dubious at best. A while back I bought 25+ different supposed coprolites from the Morrison Formation from a good number of different sellers to examine and take pictures of. I looked at them extensively under a microscope. There was no evidence at all of any inclusions or burrows. So I definitely haven't seen any definitive proof. Marco Sr. 1 1 "Any day that you can fossil hunt is a great day." My family fossil website Some Of My Shark, Ray, Fish And Other Micros My Extant Shark Jaw Collection Link to comment Share on other sites More sharing options...
cngodles Posted 19 hours ago Share Posted 19 hours ago (edited) I've heard of coprolite fossils but never attempted to identify one. The same goes for trace fossils. When I found this, I thought it might be some odd plant fossil. Glenshaw Formation, Portersville Limestone. Late Pennsylvanian, Kasimovian (303–305 MYA, give or take). The area has plenty of fresh water and marine shark remains, so it's expected. But I've never really taken the time to look for or identify one. Scale bar = 1 cm. It's about 2.6 cm long. It has a spiral-ish makeup. It appears to be preserved in sheets. From the little bit of research I've done, these are both possible states of shark/fish coprolites. The top has four protruding pieces tilted in the same spiral manner. I am asking, is this indeed a coprolite? (Also, I'm following the trend of new coprolite IDs being asked for here. If this should be an independent post, it can/should be moved) Edited 19 hours ago by cngodles 1 Fossils of Parks Township - Research | Catalog | How-to Make High-Contrast Photos Link to comment Share on other sites More sharing options...
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