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GAPER CLAM
Images: 
By PRK
Taxonomy
Gaper Clam
Kingdom: Animalia
Phylum: Mollusca
Class: Bivalvia
Order: Veneroida
Family: Mactridae
Genus: Tresus
Species: Tresus sp.
Author Citation Gray, 1853
Geological Time Scale
Eon: Phanerozoic
Era: Cenozoic
Period: Quaternary
Epoch: Pleistocene
Stratigraphy
San Pedro Formation
Provenance
Collector: Prk
Acquired by: Field Collection
Location
California
United States
Comments
Articulated valves found in living position in the substrate just below a shelly hash zone created by a tsunami. They may have been alive at the time of the deposition of the tsunami hash layer, which could conceivably have suffocated them. Found in the San Pedro Formation sands.
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