Arroyo del Valle (Cretaceous of the United States)

Where: Alameda County, California (37.6° N, 121.7° W: paleocoordinates 39.1° N, 84.5° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Asuncion Group, Turonian (93.9 - 89.8 Ma)

• From a thick body of boulder conglomerates. Collection from a single boulder in this conglomerate.

• bed-level stratigraphic resolution

Environment/lithology: marine; conglomerate

• No paleoenvironmental data reported.
• Conglomerate. From single boulder on unknown lithology.

Size class: macrofossils

Collected by A. S. Huey

Collection methods: quarrying,

Primary reference: F. M. Anderson. 1958. Upper Cretaceous of the Pacific Coast. Geological Society of America Memoir 71:1-378 [A. Miller/A. Hendy/M. Clapham]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 44240: authorized by Austin Hendy, entered by Austin Hendy on 06.09.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Probably not exhaustive, but representative.
Show authors, comments, and common names
Cephalopoda
 Ammonitida - Baculitidae
Baculites fairbanksi
Baculites fairbanksi Anderson 1902 ammonite
 Ammonitida - Desmoceratidae
"Beudanticeras aff. breweri" = Brewericeras breweri
"Beudanticeras aff. breweri" = Brewericeras breweri Gabb 1864 ammonite
misspelled as "Beudanticeras aff. brewerii"
Gastropoda
 Cerithioidea - Turritellidae
Turritella aff. petersoni
Turritella aff. petersoni Merriam 1941 turret shell
Bivalvia
 Cardiida - Veneridae
"Trigonocallista nitida" = Calva (Egelicalva) nitida
"Trigonocallista nitida" = Calva (Egelicalva) nitida Gabb 1864 venus clam