Also known as Section 2 - unconformity (upper) shell bed type
Where: Sonora, Mexico (31.8° N, 114.1° W: paleocoordinates 31.8° N, 114.1° W)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Late/Upper Pleistocene (0.1 - 0.0 Ma)
• Pleistocene fluvial, eolian, and deltaic deposits exposed in sea cliffs, overlain by coquina bed (dated at 125,00 bp)
• bed-level stratigraphic resolution
Environment/lithology: transition zone or lower shoreface; unlithified, burrowed, bioturbated, fine-grained, medium sandstone and siltstone
Size class: macrofossils
Collection methods: bulk,
• No comments on collection metholodolgy
Primary reference: K.H. Meldahl and A. H. Cutler. 1992. Neotectonics and taphonomy; Pleistocene molluscan shell accumulations in the northern Gulf of California. Palaios 7(2):187-197 [A. Miller/A. Hendy/A. Hendy]more details
Purpose of describing collection: taphonomic analysis
PaleoDB collection 34936: authorized by Austin Hendy, entered by Austin Hendy on 20.10.2003
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
Tegula rugosa snail | |
Columbella sp. Lamarck 1799 snail | |
Bivalvia | |
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Ostrea sp. Linnaeus 1758 oyster | |
Trachycardium sp. Mörch 1853 cockle | |
Chione californiensis, "Chione gnidia" = Chionopsis gnidia
Chione californiensis Broderip and Sowerby I 1835 venus clam
"Chione gnidia" = Chionopsis gnidia Broderip and Sowerby I 1829 venus clam | |
Cirripedia | |
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