Stop #6: Benton formation, Carlile member (broken up gray materical in center of image). Gray micrite limestone from deep in the Western Interior Seaway. This sediment is mainly from small marine shells which you can easily see with a hand lens. The upper rock layer near top of image is the Fort Hays member of the Niobrara formation.
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Niobrara formation, Fort Hays member. Deep in the Western Interior Seaway, abundant in marine fossils; clams, oysters & sharks teeth are common.
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Niobrara formation, Fort Hays member: bowl-shaped clams called "Cremnoceramus" are very common. A crystal/prism structure can be seen on the edges of these broken clams.
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