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Sandstone

Sandstone, Potomac Formation. Cretaceous Period. Beach sand may one day harden into rock like this. The Smithsonian Castle is made of a red sandstone from Poolesville, Maryland.

Group: Sedimentary
Image Number: 2002-11792
Catalog Number: 116641
Gift of Architect of the U.S. Capitol , 1994
Locality: Aquia Creek , Virginia

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Smithsonian National Museum of Natural History Department of Mineral Sciences website Credits