USGS 1088 [Paskenta Fm] (Cretaceous of the United States)

Also known as Sta. 91

Where: Tehama County, California (40.1° N, 122.2° W: paleocoordinates 38.1° N, 71.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Paskenta Formation, Valanginian (139.8 - 132.9 Ma)

• STRATIGRAPHIC RELATIONS: From the Paskenta Fm. AGE: Valanginian, on the basis of macrofossil biostratigraphy. STRATIGRAPHIC POSITION: From unknown position within formation.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified siliciclastic sediments

• ENVIRONMENT: Not stated in text.
• SPECIFIC LITHOLOGY: Not stated, but probably siliciclastic. LITHIFICATION: Lithified on the basis of figured specimens.

Size class: macrofossils

Preservation: cast, mold/impression

Collected by Diller & Storrs in 1893; reposited in the USNM

Collection methods: surface (in situ),

• COLLECTORS: Diller, Storrs and Stanton 1893. REPOSITORY: USNM, Washington DC.

Primary reference: R. W. Imlay. 1960. Ammonites of Early Cretaceous age (Valanginian and Hauterivian) from the Pacific Coast states. United States Geological Survey Professional Paper 334(F):1-228 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 83596: authorized by Austin Hendy, entered by Austin Hendy on 22.08.2008, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for ammonoidea. Other taxonomic groups may be present but are not listed. NOMENCLATURE: Authoritative publication, with fairly modern nomenclature, and species-resolution identifications.
Gastropoda
 Sorbeoconcha - Paskentanidae
"? Turbo ? humerosus" = Paskentana humerosa
"? Turbo ? humerosus" = Paskentana humerosa Stanton 1895 snail
 Trochoidea - Turbinidae
? Turbo trilineatus Stanton 1895 snail
Bivalvia
 Nuculida - Nuculidae
"Nucula gabbi" = Leionucula gabbi
"Nucula gabbi" = Leionucula gabbi Stanton 1895 nut clam
 Pectinida - Buchiidae
Buchia keyserlingi Lahusen 1888 scallop
 Carditida - Astartidae
"Astarte trapezoidalis" = Oxyeurax trapezoidalis
"Astarte trapezoidalis" = Oxyeurax trapezoidalis Stanton 1895 clam
Cephalopoda
 Ammonitida - Polyptychitidae
Neocraspedites giganteus Imlay 1960 ammonite
Homolsomites mutabilis Stanton 1895 ammonite
 Ammonitida - Neocomitidae
Thurmanniceras jenkinsi Anderson 1933 ammonite
Thurmanniceras cf. stippi Anderson 1938 ammonite
as " Thurmanniceras sp. juv. cf. T. stippi"
 Belemnitida - Belemnitidae
"Belemnites impressus" = Acroteuthis impressa
"Belemnites impressus" = Acroteuthis impressa Gabb 1864 belemnite