Lone Hunter Posted May 11, 2022 Share Posted May 11, 2022 Found in Grayson formation Tarrant co, have searched and searched and finally came across Pseudoperna congesta, if that's not what it is I give up . Can't tell what they were attached to, assuming it's a mineral encrusting them? Or are they encrusting the mineral? My guess is it's some form of iron oxide, perhaps magnetite? Scale is cm. Link to comment Share on other sites More sharing options...
Rockwood Posted May 12, 2022 Share Posted May 12, 2022 They may have been desperate enough to encrust a chunk of marcasite ? Link to comment Share on other sites More sharing options...
Lone Hunter Posted May 12, 2022 Author Share Posted May 12, 2022 Marcasite is pretty rare in Texas, how about botryoidal hematite? Link to comment Share on other sites More sharing options...
Rockwood Posted May 12, 2022 Share Posted May 12, 2022 Or could this actually be the remnant of a ball of worm tubes ? The mineral just providing matrix enough for it to remain. Link to comment Share on other sites More sharing options...
JohnJ Posted May 12, 2022 Share Posted May 12, 2022 Marcasite is actually fairly common in parts of Texas. Hematite... maybe. I know it's hard to get good images of small items, but natural lightning might help with this piece. The human mind has the ability to believe anything is true. - JJ Link to comment Share on other sites More sharing options...
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