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

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Niobrara formation, Fort Hays member: white vein is marine shales is calcium carbonate filling cracks. This occurred much later in time.
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Niobrara formation, Fort Hays member: white vein is marine shales is calcium carbonate filling cracks. This occurred much later in time.



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