Found today in a creek in Central KY. Couple of video links below. Any thoughts are appreciated (chert, use, etc). As always I appreciate you fellas.
in situ video : https://youtu.be/2WfNS4YAe6E
closer look : https://youtu.be/sckw-M01-I0
in situ video : https://youtu.be/2WfNS4YAe6E
closer look : https://youtu.be/sckw-M01-I0
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