Geology of Colorado (Boulder Valley) - Field Trip #1, Stop #6: Benton, Niobrara Formations

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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. Deep in the Western Interior Seaway, abundant in marine fossils; clams, oysters & sharks teeth are common.