UCLA loc. 4131, Jalama Creek (Cretaceous of the United States)

Also known as LACMIP 24131

Where: Santa Barbara County, California (34.5° N, 120.4° W: paleocoordinates 40.6° N, 90.6° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: V Member (Jalama Formation), Late/Upper Campanian (83.5 - 70.6 Ma)

• scale of strat. resolution may be couple of beds. JA: the Jalama Formation is lower upper Campanian according to Squires and Saul 2003

• bed-level stratigraphic resolution

Environment/lithology: offshore; lithified, gray, yellow sandstone and conglomerate

• "180-230' thick. Hard, light-gray to buff, bedded arkosic sandstone; lenses of pebble conglomerate near base."

Size class: macrofossils

Collection methods: mechanical,

Primary reference: D. H. Dailey and W. P. Popenoe. 1966. Mollusca from the upper Cretaceous Jalama Formation, Santa Barbara County, California. University of California Publications in Geological Sciences 65:1-41 [J. Alroy/M. Sommers/A. Clement]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 1536: authorized by John Alroy, entered by Mike Sommers on 13.05.1999, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• Abundances: R (rare) 1-2 specs., U (uncommon) 3-10 specs., C (common) 11-25 specs., A (abundant) 26+ specs.
Gastropoda
 Neogastropoda - Volutidae
Volutoderma ynezae2 Saul and Squires 2008 volute
originally entered as "Volutoderma ? magna"
Volutoderma cf. averillii Gabb 1864 volute
Volutoderma sp. cf. V. averillii - originally entered as "Volutoderma cf. averillii"
Bivalvia
 Cardiida - Corbiculidae
Corbicula astartoides Dailey and Popenoe 1966 clam
 Cardiida - Arcticidae
Etea occidentalis Dailey and Popenoe 1966 clam
 Cardiida - Ungulinidae
Diplodonta davisi Dailey and Popenoe 1966 clam
 Cardiida - Mactridae
Cymbophora ? gabbiana Anderson 1902 clam
originally entered as "Cymbophora ? gabbiana"
 Cardiida - Veneridae
Calva (Egelicalva) crassa1 Saul and Popenoe 1992 venus clam
 Trigoniida - Steinmanellidae
"Trigonia hemphilli" = Popenoella hemphilli
"Trigonia hemphilli" = Popenoella hemphilli Anderson 1958 clam
 Arcida - Glycymerididae
"Glycymeris suciensis" = Glycymerita veatchii
"Glycymeris suciensis" = Glycymerita veatchii Gabb 1864 clam