Caaaleb Posted February 22, 2022 Share Posted February 22, 2022 Hello, I found what I believe to be a sand dollar a little over a year ago in a small creek in the DFW area in North Texas. I checked the USGS Pocket Geology on my phone and it said that the area in which I found the sand dollar in was in the Washita Group in the Cretaceous, next to some Woodbine Group members. I recently heard that sand dollars first appeared in the Eocene or Miocene or sometime in the Ice Age. But as already mentioned, I found the sand dollar in a Cretaceous area. Is it possible to find sand dollars in Cretaceous-era rock? Is it a REALLY early sand dollar? Or is it a mistake with the USGS Pocket Geology? Is this even a sand dollar? I see urchin patterns on it as well and the shape of a sand dollar, so I know it's at least an urchin of sorts. I didn't know if I should've posted this in the Id Section or another section of the forum, so I think it's appropriate to post it here, right? Please correct me if I must post this somewhere else. Link to comment Share on other sites More sharing options...
Top Trilo Posted February 22, 2022 Share Posted February 22, 2022 This is not a sand dollar but another type of echinoid, there's a good chance an expert Texan will give you a more accurate identification. 1 “If fossils are not "boggling" your mind then you are simply not doing it right” -Ken (digit) "No fossil is garbage, it´s just not completely preserved” -Franz (FranzBernhard) "With hammer in hand, the open horizon of time, and dear friends by my side, what can we not accomplish together?" -Kane (Kane) "We are in a way conquering time, reuniting members of a long lost family" -Quincy (Opabinia Blues) "I loved reading the trip reports, I loved the sharing, I loved the educational aspect, I loved the humor. It felt like home. It still does" -Mike (Pagurus) “The best deal I ever got was getting accepted as a member on The Fossil Forum. Not only got an invaluable pool of knowledge, but gained a loving family as well.” -Doren (caldigger) "it really is nice, to visit the oasis that is TFF" -Tim (fossildude19) "Life's Good! -Adam (Tidgy's Dad) Link to comment Share on other sites More sharing options...
Caaaleb Posted February 22, 2022 Author Share Posted February 22, 2022 6 minutes ago, Top Trilo said: This is not a sand dollar but another type of echinoid, there's a good chance an expert Texan will give you a more accurate identification. Wow! Thank you. I had myself fooled this whole time. It's good to know it's not a sand dollar Link to comment Share on other sites More sharing options...
Caaaleb Posted February 23, 2022 Author Share Posted February 23, 2022 I found this Echinoid a bit over a year ago in a creek in the DFW area of North Texas. I found this in the Washita Group of the Cretaceous. I thought this was a sand dollar, but I recently learned that sand dollars did not appear until the Ice Age era. I posted a question regarding the Echinoid on the discussions section of the forum and was told it was not a Sand Dollar. Anyway, I would like to know the species and classification of this flat Echinoid if anyone may know. I've never seen any Echinoid like it. Link to comment Share on other sites More sharing options...
DPS Ammonite Posted February 23, 2022 Share Posted February 23, 2022 Even though I cannot see the surface details, this looks like a Coenholectypus echinoid due to its faint five sides, flattened profile and the slightly peaked top. See one from Finsley’s “A Field Guide to Fossils of Texas”. 1 2 My goal is to leave no stone or fossil unturned. See my Arizona Paleontology Guide link The best single resource for Arizona paleontology anywhere. Link to comment Share on other sites More sharing options...
Caaaleb Posted February 23, 2022 Author Share Posted February 23, 2022 Thanks! I've been trying to self identify this sea urchin for a bit now and think your source might be it. I'll look into this Link to comment Share on other sites More sharing options...
Fossildude19 Posted February 23, 2022 Share Posted February 23, 2022 Topics merged. Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
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