naturegirl Posted March 16, 2018 Share Posted March 16, 2018 couldn't get a good pic because of shadows...went back and shoved some clay into it. What is it? Thank you. Link to comment Share on other sites More sharing options...
Kane Posted March 16, 2018 Share Posted March 16, 2018 Just a guess, but possibly the impression of a brachiopod commissure. ...How to Philosophize with a Hammer Link to comment Share on other sites More sharing options...
Carl Posted March 16, 2018 Share Posted March 16, 2018 WOW, that would be a huge brachiopod! Maybe an oyster commissure? Link to comment Share on other sites More sharing options...
Kane Posted March 16, 2018 Share Posted March 16, 2018 9 minutes ago, Carl said: WOW, that would be a huge brachiopod! Maybe an oyster commissure? Yeah, you're probably right that it would likely be oyster. ...How to Philosophize with a Hammer Link to comment Share on other sites More sharing options...
Fossildude19 Posted March 16, 2018 Share Posted March 16, 2018 Where was this found? 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...
naturegirl Posted March 16, 2018 Author Share Posted March 16, 2018 newbie here...so a commissure would be where the two halves of the shells met, and then for this one, the impression was made when that closed edge was covered? It is from NE Okla. Link to comment Share on other sites More sharing options...
Rockwood Posted March 16, 2018 Share Posted March 16, 2018 Try this on for size. This edge was originally precipitated as araganite which dissolved early in diagenesis leaving essentially a mold of the region so composed. Later in the process the remainder of the calcite shell was lost. Theoretically the area where the abductor muscel inserts may have been preserved near it since it is was aragonite. Link to comment Share on other sites More sharing options...
naturegirl Posted March 16, 2018 Author Share Posted March 16, 2018 Rockwood, that size doesn't fit me! and I could look those words up, but chances are they won't stick in my mind...just a basic explanation, please. This is NOT a fossil rich area I'm in and I've not seen this before...but fairly sure it isn't a Crinoid imprint. Link to comment Share on other sites More sharing options...
Rockwood Posted March 16, 2018 Share Posted March 16, 2018 For anyone with Seilacher and Gishlick's book Morphodynamics this idea springs from page206. Plate 13.2 naturegirl: Wait for someone to second the motion. If it flies it will be worth explaining. Link to comment Share on other sites More sharing options...
Auspex Posted March 16, 2018 Share Posted March 16, 2018 I commend you for your ingenuity in taking an impression; well done to even think of it! This shows that you at least suspected that something was there that is now gone. To sum up, a large, ribbed sea shell (clam? oyster?) was buried in mud. Fast forward X millennia and the mud is now rock, and the shell has dissolved. When the rock was broken up, this little Mona Lisa smile was exposed in this piece. "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease! Link to comment Share on other sites More sharing options...
Rockwood Posted March 16, 2018 Share Posted March 16, 2018 6 minutes ago, Auspex said: I commend you for your ingenuity in taking an impression; well done to even think of it! This shows that you at least suspected that something was there that is now gone. To sum up, a large, ribbed sea shell (clam? oyster?) was buried in mud. Fast forward X millennia and the mud is now rock, and the shell has dissolved. When the rock was broken up, this little Mona Lisa smile was exposed in this piece. Wait a minute. Shell, not gape ? How does that work ? Edit: Oh! It was just barely kissing here. Link to comment Share on other sites More sharing options...
naturegirl Posted March 16, 2018 Author Share Posted March 16, 2018 lol! Thanks y'all, I've got some reading to do now. Link to comment Share on other sites More sharing options...
Herb Posted March 17, 2018 Share Posted March 17, 2018 maybe the edge of a razor clam shell "Absence of evidence is not evidence of absence"_ Carl Sagen No trees were killed in this posting......however, many innocent electrons were diverted from where they originally intended to go. " I think, therefore I collect fossils." _ Me "When you have eliminated the impossible, whatever remains, however improbable, must be the truth."__S. Holmes "can't we all just get along?" Jack Nicholson from Mars Attacks Link to comment Share on other sites More sharing options...
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