UCLA Loc. 3642 - Chico Creek [Chico Fm] (Cretaceous of the United States)

Also known as LACMIP Loc. 23642

Where: Butte County, California (39.7° N, 121.9° W: paleocoordinates 47.0° N, 89.9° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Chico Formation, Campanian (83.6 - 72.1 Ma)

• LITHOSTRATIGRAPHIC RELATIONS: From the Chico Fm, for which lithostratigraphic relationships are not discussed. AGE: Campanian, on the basis of ammonite biostratigraphy. STRATIGRAPHIC POSITION: From upper part of Chico Fm.

• bed-level stratigraphic resolution

Environment/lithology: coastal; lithified siliciclastic sediments

• ENVIRONMENT: Not reported in text, but apparently shallow marine siliciclastic.
• LITHOLOGY: Not reported, but presumably siliciclastic. LITHIFICATION: Lithified, on the basis of figured specimens.

Size class: macrofossils

Preservation: mold/impression

Collected by Saul & Saul; reposited in the LACM

Collection methods: surface (in situ),

• COLLECTOR: L.E. & R.B. Saul. REPOSITORY: UCLA (at the time).

Primary reference: T. Matsumoto. 1960. Upper Cretaceous ammonites of California. Part III. Memoirs of the Faculty of Science, Kyushu University Series D, Geology, Special Volume II 1-204 [A. Hendy/A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 86938: authorized by Austin Hendy, entered by Austin Hendy on 24.02.2009, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for Ammonoidea. NOMENCLATURE: From authoritative publication, but comprising somewhat antiquated nomenclature, though with species-resolution identifications.
Bivalvia
 Cardiida - Veneridae
Calva (Egelicalva) buttensis Anderson 1958 venus clam
Cephalopoda
 Ammonitida - Tetragonitidae
"Gaudryceras cf. denmanense" = Gaudryceras (Gaudryceras) denmanense
"Gaudryceras cf. denmanense" = Gaudryceras (Gaudryceras) denmanense Whiteaves 1903 ammonite
 Ammonitida - Pachydiscidae
Pachydiscus cf. neevesi Whiteaves 1903 ammonite
Canadoceras sp. Spath 1922 ammonite
 Ammonitida - Collignoniceratidae
Submortoniceras chicoense Trask 1856 ammonite
 Ammonitida - Diplomoceratidae
Glyptoxoceras sp. Spath 1925 ammonite
 Ammonitida - Baculitidae
Baculites chicoensis Trask 1856 ammonite
 Phylloceratida - Phylloceratidae
"Neophylloceras cf. ramosum" = Hypophylloceras (Neophylloceras) ramosum
"Neophylloceras cf. ramosum" = Hypophylloceras (Neophylloceras) ramosum Meek 1857 ammonite