CIT 623 - Santa Barbara [Jalama Fm] (Cretaceous of the United States)

Also known as LACMIP loc. 10687

Where: Santa Barbara County, California (34.6° N, 120.1° W: paleocoordinates 40.6° N, 90.2° W)

• coordinate based on political unit

• small collection-level geographic resolution

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

• scale of strat. resolution could be group 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

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 1510: 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.
Cephalopoda
 Ammonitida - Pachydiscidae
Pachydiscus cf. japonicus ammonite
(Neodesmoceras) - originally entered as "Pachydiscus cf. japonicus"
Pachydiscus cf. binodatus Whiteaves 1903 ammonite
(Pachydiscus) - originally entered as "Pachydiscus cf. binodatus"
Menuites sp. Spath 1922 ammonite
Bivalvia
 Trigoniida - Steinmanellidae
"Trigonia hemphilli" = Popenoella hemphilli
"Trigonia hemphilli" = Popenoella hemphilli Anderson 1958 clam