The Gypsum Files

Notes on the Rock Nobody Knows

Indiana in the Mississippian

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See all that water covering Indiana (click to enlarge)? That’s why there are two gypsum mines in Shoals today.

Geologist Ronald Blakey has put together a series of amazing maps showing the changes the North American continent has undergone throughout the geological ages. If you’re interested in geology and plate tectonics (and I think you should be), check it out.

NAM_key-345Ma_EMiss-sm.jpg (1143×1429).


Written by Elizabeth McCullough

September 30, 2013 at 5:32 pm

Posted in gypsum

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