$5
Other
Natural History & Geology
Buffalo
USA
Small circular rock shaped oval with a hard shiny surface that seems to be quarts. With an imprint of a small shell with a micro diamond at the foot of the shell.
Unknown
Answered within
3 days
By Amber R
Aug 31, 18:54 UTC
Scallop shell impression on a small rounded stone. If discovered in a river bed or along shore lines in the Great Lakes Region of the United States; this is possibly an impression from the Silurian Period. The Silurian period took place more than 400 million years ago and was a time of glacial melt. The rock appears to be granite which is a holocrystalline rock mainly consisting of feldspar, quartz, mica, and amphibole minerals. Unknown dimensions; Unknown weight.
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