UCLA loc. 4108, Jalama Fm. (Cretaceous of the United States)

Also known as LACMIP loc. 24108

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: 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

• "225-780' thick. Hard, thick-bedded to massive, grayish white to buff 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 1513: 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.
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium sp. Linnaeus 1758 tusk shell
Cephalopoda
 Ammonitida - Baculitidae
Baculites sp. Lamarck 1799 ammonite
Bivalvia
 Nuculida - Nuculidae
"Acila demessa" = Acila (Truncacila) demessa
"Acila demessa" = Acila (Truncacila) demessa Finlay 1927 divaricate nutclam
 Arcida - Glycymerididae
"Glycymeris suciensis" = Glycymerita veatchii
"Glycymeris suciensis" = Glycymerita veatchii Gabb 1864 clam
 Cardiida - Tancrediidae
Meekia daileyi Saul and Popenoe 1962 clam
 Cardiida - Mactridae
Cymbophora cf. ashburnerii Gabb 1864 clam
originally entered as "Cymbophora cf. ashburnerii"
Gastropoda
 Epitonioidea - Epitoniidae
Acirsa obtusa White 1889 wentletrap
 Sorbeoconcha - Naticidae
"Gyrodes canadensis" = Gyrodes (Sohlella) canadensis Whiteaves 1903 moon snail
Euspira sp. Agassiz 1837 moon snail
 Sorbeoconcha - Aporrhaidae
"Lispodesthes rotundus" = Lispodesthes rotundatus
"Lispodesthes rotundus" = Lispodesthes rotundatus Waring 1917 snail
 Cerithioidea - Potamididae
Bittiscala sp. Finlay and Marwick 1937 horn snail
 Heterostropha - Ringiculidae
Biplica obliqua Gabb 1864 snail