Gulf of California section 5 "beach berm" fauna (Pleistocene of Mexico)

Also known as Section 5 - Beach berm 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: foreshore; unlithified, bioturbated, shelly/skeletal sandstone

• active trans-tensional rift basin
• Planar bedded and low-angle corss-bedded shell hash sands are associated with shell bed. Bioturbation limited to rare

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 34938: authorized by Austin Hendy, entered by Austin Hendy on 20.10.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Cirripedia
  -
Cirripedia indet. barnacle
Listed as "barnacle plates"; no abundance given
Bivalvia
 Cardiida - Veneridae
Chione californiensis Broderip and Sowerby I 1835 venus clam
Less than 2% abundance
"Chione gnidia" = Chionopsis gnidia Broderip and Sowerby I 1829 venus clam
 Cardiida - Cardiidae
Trachycardium sp. Mörch 1853 cockle
Less than 2% abundance
Gastropoda
 Sorbeoconcha - Turritellidae
Turritella sp. Lamarck 1799 turret shell
Less than 2% abundance