CAS Loc. 1125, mile west of Pentz: Campanian, California
collected by Hanna et al.

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Arcida - Glycymerididae
Glycymeris pentzana n. sp. Anderson 1958
Glycymeris veatchii (Gabb 1864)
recombined as Glycymerita veatchii
Bivalvia - Carditida - Astartidae
"Astarte" tuscana Gabb 1864
Bivalvia - Cardiida - Mactridae
Cymbophora buttensis n. sp. Anderson 1958
Bivalvia - Trigoniida - Megatrigoniidae
Trigonia aff. evansana Meek 1864
recombined as Pterotrigonia evansana
Bivalvia - Nuculida - Nuculidae
Acila (Truncacila) demessa (Finlay 1927)
Cephalopoda - Ammonitida - Nostoceratidae
Helicoceras declive n. sp. Gabb 1864
recombined as Bostrychoceras declive
Bostrychoceras brewerii (Gabb 1864)
Cephalopoda - Ammonitida - Baculitidae
Baculites chicoensis Trask 1856
Cephalopoda - Ammonitida - Pachydiscidae
Canadoceras cf. fraternum (Gabb 1869)
    = Canadoceras cf. newberryanum Meek 1858
Matsumoto 1960
Cephalopoda - Ammonitida - Collignoniceratidae
Butticeras buttense Anderson 1958
recombined as Submortoniceras buttense
Schloenbachia buttensis n. sp. Anderson 1902
synonym of Submortoniceras chicoense
(1 measurement)
Mortoniceras (Submortoniceras) gabbi (Anderson 1902)
synonym of Submortoniceras chicoense
Mortoniceras (Submortoniceras) pentzanum Anderson 1958
synonym of Submortoniceras chicoense
Gastropoda - Opisthobranchia - Cylichnidae
Scaphander (Microscapha) costatus (Gabb 1864)
recombined as Scaphander (Mirascapha) costatus
Gastropoda - Heterostropha - Ringiculidae
Oligoptycha obliqua (Gabb 1864)
recombined as Biplica obliqua
Gastropoda - Neogastropoda - Volutidae
Volutoderma californica Dall 1907
synonym of Volutoderma averillii
Gastropoda - Aporrhaidae
Anchura falciformis (Gabb 1864)
see common names

Geography
Country:United States State/province:California County:Butte
Coordinates: 39.7° North, 121.6° West (view map)
Paleocoordinates:46.9° North, 89.5° West
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period:Cretaceous Epoch:Late/Upper Cretaceous
Stage:Campanian 10 m.y. bin:Cretaceous 7
Key time interval:Campanian
Age range of interval:83.60000 - 72.10000 m.y. ago
Stratigraphy
Geological group:Asuncion Formation:Chico
Stratigraphic resolution:bed
Stratigraphy comments: The Chico Formation only has a thickness of a few hundred feet here, and is not regarded as representing the span exposed on Chico Creek. Contains similar faunas to the middle Chico Creek section (Santonian); Campanian according to Matsumoto (1960).
Lithology and environment
Primary lithology: lithified sandstone
Includes fossils?Y
Lithology description: Bedded sandstone.
Environment:marine indet.
Geology comments: No paleoenvironmental data reported.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:surface (in situ),field collection
Reason for describing collection:biostratigraphic analysis
Museum repositories:CAS
Collectors:Hanna et al.
Collection method comments: Initially listed by Gabb (1864), but amende with further collecting by Hanna, Bennison, and Anderson. Taxonomy presumably updated by Anderson.
Taxonomic list comments:Reasonably exhaustive list.
Metadata
Database number:44274
Authorizer:A. Hendy, M. Clapham, J. Marcot Enterer:A. Hendy, M. Clapham, J. Marcot
Modifier:J. Marcot Research group:marine invertebrate
Created:2004-09-08 00:26:51 Last modified:2022-04-09 14:51:00
Access level:the public Released:2004-09-08 00:26:51
Creative Commons license:CC BY
Reference information

Primary reference:
11610. F. M. Anderson. 1958. Upper Cretaceous of the Pacific Coast. Geological Society of America Memoir 71:1-378 [A. Miller/A. Hendy/M. Clapham]

Secondary references:

29214 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]