UCLA loc. 3648, Fossil Bluff, West side of Chico Creek (Cretaceous of the United States)

Also known as LACMIP loc. 10861, LACMIP Loc. 23648, CIT loc. 1183, CAS loc. 28172

Where: Butte County, California (39.8° N, 121.7° W: paleocoordinates 47.1° N, 90.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Tenmile Member (Chico Formation), Middle Campanian (83.5 - 70.6 Ma)

• LITHOSTRATIGRAPHIC RELATIONS: From the Chico Fm, for which lithostratigraphic relationships are not discussed. AGE: Campanian, on the basis of ammonite biostratigraphy. STRATIGRAPHIC POSITION: This is the highest ammoinite locality in Chico Creek.

• bed-level stratigraphic resolution

Environment/lithology: coastal; lithified sandstone

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

Size class: macrofossils

Preservation: mold/impression

Collected by L.R. Saul, R.B. Saul in 1952; reposited in the LACM

Collection methods: surface (in situ),

• COLLECTOR: L.E. & R.B. Saul, 1952. REPOSITORY: UCLA (at the time).

Primary reference: J. A. Taff, G. D. Hanna, and C. M. Cross. 1940. Type locality of the Cretaceous Chico formation. Geological Society America Bulletin 51(9):1131-1328 [J. Marcot/J. Marcot]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 86936: authorized by Austin Hendy, entered by Austin Hendy on 24.02.2009, edited by Matthew Clapham and 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.
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Gastropoda
 Heterostropha - Ringiculidae
Biplica obliqua4
Biplica obliqua4 Gabb 1864 snail
 Epitonioidea - Epitoniidae
Belliscala meta10
Belliscala meta10 Squires and Saul 2003 wentletrap
 Cerithioidea - Melanopsidae
Boggsia tenuis9
Boggsia tenuis9 Gabb 1864 snail
 Neogastropoda - Volutidae
Volutoderma averillii8
Volutoderma averillii8 Gabb 1864 volute
 Neogastropoda - Perissityidae
Forsia popenoei6
Forsia popenoei6 Saul 1988 snail
 Sorbeoconcha - Aporrhaidae
Anchura falciformis2
Anchura falciformis2 Gabb 1864 snail
 Pseudomelanoidea - Pseudomelaniidae
Liocium ? marcidulum11
Cephalopoda
 Ammonitida - Baculitidae
Baculites chicoensis3
Baculites chicoensis3 Trask 1856 ammonite
 Ammonitida - Diplomoceratidae
Glyptoxoceras sp.3
Glyptoxoceras sp.3 Spath 1925 ammonite
 Ammonitida - Tetragonitidae
Zelandites sp.3
Zelandites sp.3 Marshall 1926 ammonite
 Ammonitida - Pachydiscidae
? Canadoceras sp.3
? Canadoceras sp.3 Spath 1922 ammonite
Bivalvia
 Cardiida - Mactridae
Cymbophora suciensis5
Cymbophora suciensis5 Whiteaves 1879 clam
 Cardiida - Veneridae
Calva (Egelicalva) bowersiana7
Calva (Egelicalva) bowersiana7 Cooper 1894 venus clam
 Myalinida - Inoceramidae
Inoceramus subundatus3
Inoceramus subundatus3 Meek 1861 clam
 Arcida - Cucullaeidae
Cucullaea (Idonearca) buttensis n. sp.1
Cucullaea (Idonearca) buttensis n. sp.1 Anderson 1958 clam
1Anderson 1958; 2Elder and Saul 1996; 3Matsumoto 1960; 4Popenoe 1957; 5Saul 1974; 6Saul 1988; 7Saul and Popenoe 1992; 8Saul and Squires 2008; 9Squires and Saul 1997; 10Squires and Saul 2003; 11Squires and Saul 2003