JBkansas Posted November 26, 2022 Share Posted November 26, 2022 (edited) Went hunting in the Tuttle Creek spillway which was mostly a bust (though I may be biased by my every-other-rock experiences at Lawrence and Lake Shawnee). Aside from fusilinids and a couple of indeterminate shells I found a rock with multiple smooth flat round structures (3-4 cm across). The rock had fallen down the side of the spillway so age is likely somewhere in Carboniferous to Permian. It broke apart when I pulled it from the ground. Any have any idea what these are? This shows the side view of one of the structures (top edge on the left side) Edited November 26, 2022 by JBkansas Link to comment Share on other sites More sharing options...
JBkansas Posted November 26, 2022 Author Share Posted November 26, 2022 Thanks everyone for looking, I'll see if I can extract one intact and get pictures from all sides. Link to comment Share on other sites More sharing options...
Rockwood Posted November 26, 2022 Share Posted November 26, 2022 Sand dollars weren't around yet. 1 1 Link to comment Share on other sites More sharing options...
JBkansas Posted November 26, 2022 Author Share Posted November 26, 2022 Also don't see any sand dollar features on the exposed surfaces. Link to comment Share on other sites More sharing options...
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