CSUN 676 (Eocene of the United States)

Also known as LACMIP 16192

Where: Riverside County, California (33.6° N, 115.7° W: paleocoordinates 36.0° N, 98.7° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: P7 - P8 foram zone, Maniobra Formation, Ypresian (56.0 - 47.8 Ma)

• Basal part of formation; Capay Stage; Foraminifera indicative of P7 to P9 Zones and calcareous nannofossils indicative of CP9 to CP11 Zones also have been found 58 m upsection from CSUN locality 662 (Advocate, 1983).

• group of beds-level stratigraphic resolution

Environment/lithology: submarine fan; shale

• These deposits represent a transitional marginal marine to deep-water submarine-fan sequence deposited in subtropical waters (Advocate, 1983).
• consists of siliciclastics that locally contain some macrofossils and microfossils.

Size classes: macrofossils, mesofossils

Primary reference: R. L. Squires. 1991. Molluscan Paleontology of the Lower Eocene Maniobra Formation, Orocopia Mountains, Southern California. Eocene Geologic History San Diego Region, Pacific Section SEPM 68:217-226 [J. Marcot/J. Marcot]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 193548: authorized by Jonathan Marcot, entered by Jonathan Marcot on 26.05.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

• Specimens at CSUN
Bivalvia
 Pectinida - Pectinoidae
Spondylus cf. carlosensis Anderson 1905 scallop
 Carditida - Carditidae
 Pholadida - Corbulidae
"Corbula (Caryocorbula) cf. dickersoni" = Corbula dickersoni
"Corbula (Caryocorbula) cf. dickersoni" = Corbula dickersoni Weaver and Palmer 1922 clam
 Cardiida - Veneridae
"Callista (Costacallista) cf. hornii" = Meretrix hornii
"Callista (Costacallista) cf. hornii" = Meretrix hornii Gabbb 1864 venus clam
"Callista (Costacallista) hornii vokesi"
Gastropoda
 Architaenioglossa - Ampullinidae
Pachycrommium clarki Stewart 1927 snail
 Sorbeoconcha - Turritellidae
Turritella andersoni Dickerson 1916 turret shell
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium ? stramineum Gabb 1864 tusk shell