USGS Mesozoic M5368, Loma Prieta road (Cretaceous of the United States)

Also known as 69-JLP-1

Where: Santa Cruz County, California (37.1° N, 121.9° W: paleocoordinates 43.3° N, 91.5° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Late/Upper Campanian (83.5 - 70.6 Ma)

• Age is poorly constrained but indicative of Late Campanian. Taxa have type locality near at Texas Flat, near Folsom, which belongs to Upper Campanian based on Baculites inornatus and B. occidentalis. Spondylus subnodosus has its type locality in the Santa Ana Mountains in Upper Campanian Metaplacenticeras pacificum zone. Baculitids found are only known from Late Campanian.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified siliciclastic sediments

Size class: macrofossils

Collected by D.L. Jones in 1969; reposited in the USNM

Primary reference: W. P. Elder. 1991. An unusual Late Cretaceous fauna from an oyster-rich interval in the Santa Cruz Mountains of California. United States Geological Survey Bulletin 1934:E1-E18 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 167704: authorized by Matthew Clapham, entered by Matthew Clapham on 29.03.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Ammonitida - Baculitidae
Baculites rex Anderson 1958 ammonite
Gastropoda
 Sorbeoconcha - Aporrhaidae
Aporrhais sp. da Costa 1778 snail
Drepanochilus sp. Meek 1864 snail
 Sorbeoconcha - Naticidae
Gyrodes sp. Conrad 1860 moon snail
 Heterostropha - Ringiculidae
Biplica cf. obliqua Gabb 1864 snail
Bivalvia
 Arcida - Parallelodontidae
 Arcida - Glycymerididae
 Cardiida - Veneridae
Calva sp. Popenoe 1937 venus clam
 Trigoniida - Megatrigonioidae
Pterotrigonia evansana Meek 1864 clam
 Nuculida - Nuculidae
Acila (Truncacila) demessa Finlay 1927 divaricate nutclam
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium sp. Linnaeus 1758 tusk shell