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Geology of Colorado (Boulder Valley) - Field Trip #1, Stop #7: Niobrara, Pierre Shale Formation

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Niobrara formation, Smoky Hills member. This is a side view of a giant clam called "Platyceramus", sometimes referred to as "Dinner on the half platter" because of their size - often over 2 feet in diameter. Many specimens of Platyceramus have been found with fossil fishes (see arromw in image) inside. Scientists believe the fish found shelter within the clam. These giant clams also serve as a home to clusters of barnacles and oysters which are often found attached to the clam shell (source: Natural History Museum of Los Angeles County)
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Niobrara formation, Smoky Hills member. This is a side view of a giant clam called "Platyceramus", sometimes referred to as "Dinner on the half platter" because of their size - often over 2 feet in diameter. Many specimens of Platyceramus have been found with fossil fishes (see arromw in image) inside. Scientists believe the fish found shelter within the clam. These giant clams also serve as a home to clusters of barnacles and oysters which are often found attached to the clam shell (source: Natural History Museum of Los Angeles County)



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