Spalled Chalk Near Castle Rock (2008)
County: Gove
Date: October 2008
Photographer: John Charlton/KGS
Place Name: Castle Rock
Short description: Spalled chalk near Castle Rock in Gove County. 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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