CAS Loc. 1665, Duncan Creek (Cretaceous of the United States)

Where: Shasta County, California (40.4° N, 122.7° W: paleocoordinates 39.2° N, 72.0° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Budden Canyon Formation, Hauterivian (132.9 - 129.4 Ma)

• STRATIGRAPHIC RELATIONS: From the Ono Fm. AGE: Hauterivian, 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 Anderson in 1929; reposited in the CAS

Collection methods: surface (in situ),

• COLLECTORS: F.M. Anderson and G.D. Hanna, 1929. REPOSITORY: CAS.

Primary reference: F. M. Anderson. 1938. Lower Cretaceous deposits in California and Oregon. Geological Society of America Special Paper 16:1-331 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 83592: 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.
Cephalopoda
 Ammonitida - Crioceratitidae
"Crioceras latum" = Crioceratites latus, "Crioceras duncanense n. sp." = Crioceratites latus, "Crioceras cf. nolani" = Crioceratites, "Neocomites russelli n. sp." = Pseudothurmannia russelli
"Crioceras latum" = Crioceratites latus Gabb 1864 ammonite
"Crioceras duncanense n. sp." = Crioceratites latus Gabb 1864 ammonite
"Crioceras cf. nolani" = Crioceratites ammonite
"Neocomites russelli n. sp." = Pseudothurmannia russelli Anderson 1938 ammonite
 Ammonitida - Acrioceratidae
Hoplocrioceras remondi, "Spiticeras duncanense n. sp." = Hoplocrioceras duncanense
Hoplocrioceras remondi Gabb 1864 ammonite
"Spiticeras duncanense n. sp." = Hoplocrioceras duncanense Anderson 1938 ammonite
Bivalvia
 Pholadida - Pleuromyidae
Pleuromya papyracea Gabb 1869 clam