County: Gove

Date: July 2001

Photographer: John Charlton/KGS

Place Name: Castle Rock

Short description: South side of Castle Rock in Gove County, after the 2001 collapse of its tallest spire. Castle Rock is part of the Smoky Hill Chalk Member of the Niobrara Chalk. The massive layers of chalk formed from sediments deposited on the bottom of a great inland sea that covered much of western North America during the later part of the Cretaceous Period, about 80 million years ago.

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