ammonites
USGS 1010 [Paskenta Fm] (Cretaceous of the United States)

Where: Tehama County, California (40.1° N, 122.2° W: paleocoordinates 37.8° N, 71.3° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Paskenta Formation, Valanginian (140.2 - 136.4 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 and Storrs, 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 83608: authorized by Austin Hendy, entered by Austin Hendy on 22.08.2008

Creative Commons license: CC BY-NC-ND (attribution-noncommercial-no derivatives)