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Smooth objects from Tuttle Creek spillway


JBkansas

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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?

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This shows the side view of one of the structures (top edge on the left side)

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Edited by JBkansas
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