BuddingPaleo Posted July 21, 2018 Share Posted July 21, 2018 Here's my question. Pulled an oyster up, it broke in half, the other side crumbled to dust. Very sad. But the surviving side has this sunny side up egg appearance. I've looked under a magnifying glass and don't see evidence of shell edges or anything. Is it a steinkern of the innards? I've stopped cleaning it until I know what it is. If it's a sneaky shell, I'll pop it off, otherwise I'll leave it. Any help is appreciated! Link to comment Share on other sites More sharing options...
Kane Posted July 21, 2018 Share Posted July 21, 2018 If it is the larger "lump" in the photo, I would say it is the steinkern. ...How to Philosophize with a Hammer Link to comment Share on other sites More sharing options...
BuddingPaleo Posted July 21, 2018 Author Share Posted July 21, 2018 Thanks I really wish the other half hadn't crumbled now! I'll leave it attached then. Much appreciated. Link to comment Share on other sites More sharing options...
Bronzviking Posted July 21, 2018 Share Posted July 21, 2018 The raised lump looks like an internal mold of a clam and the indentation appears to be an external mold of a clam. In the first photo on the right hand side, I see a possible 3rd impression of another type shell? A closer shot might confirm. Link to comment Share on other sites More sharing options...
BuddingPaleo Posted July 21, 2018 Author Share Posted July 21, 2018 35 minutes ago, Bronzviking said: The raised lump looks like an internal mold of a clam and the indentation appears to be an external mold of a clam. In the first photo on the right hand side, I see a possible 3rd impression of another type shell? A closer shot might confirm. That spot on the right is deceptive, if it's the spot that looks spiral-ish, it's just crud. Link to comment Share on other sites More sharing options...
BuddingPaleo Posted July 21, 2018 Author Share Posted July 21, 2018 Here's a nifty shot i just got. Maybe it tells for sure-ish if it's native to the oyster or not? Link to comment Share on other sites More sharing options...
Plantguy Posted July 23, 2018 Share Posted July 23, 2018 Neat several impression fragments in matrix. I'm not sure of the orientation of the last photo (the thin linear forms almost seems to show some of the original shell material or perhaps just more parts of molds ) but the earlier photos seem to show internal mold fragments with a view the adductor scar and the lower hinge area...Here's an example I have of one of the Hyotissas to compare to...adductor scars are in the center of the shells and the hinge areas are at the bottom of the photo..You can see the similar concentric ring shapes in both valves and they compare nicely to yours. Regards, Chris 2 Link to comment Share on other sites More sharing options...
Rockwood Posted July 23, 2018 Share Posted July 23, 2018 I only have time to plug the term mold fossil. Link to comment Share on other sites More sharing options...
BuddingPaleo Posted July 23, 2018 Author Share Posted July 23, 2018 Thanks! The last photo is a closeup of the "yolk" , or lump, from the front. I have tons of those around here, but the outer shell is inundated with fossil imprints lots of times. The shell is still there, just pocked with other littler shells and worms. Lots of worms! There are other kinds too, but lots of those. Helpful to know, I appreciate the explanation why, sticks in my brain that way. Link to comment Share on other sites More sharing options...
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