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Showing results for tags 'concentric'.
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From USA, Pennsylvania, Blair County...... Silurian Clinton Group. In profile, this looks conical, with the point down in the sediment rather like a conularid. But viewed from above, it is ROUND.
- 8 replies
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- clinton group
- concentric
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Can anyone ID this fossil by chance? I found it near the town of Llano, TX. It has several concentric rings, but no apparent radial lines. I'm admittedly a bit of a novice, so thank you in advance.
- 16 replies
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- concentric
- disk
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