"Chico beds" - Tuscan Springs, Tehama: Coniacian, California

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Scaphopoda - Gadilida - Gadilidae
Dentalium pusillum Gabb 1864
replaced by Cadulus (Platyschides) gabbi
Bivalvia - Mytilida - Mytilidae
Modiola cylindrica Gabb 1864
replaced by Volsella telea
Mytilus quadratus Gabb 1869
Anderson 1958
Bivalvia - Pectinida - Buchiidae
Inoceramus piochii Gabb 1864
recombined as Buchia piochii
Bivalvia - Myalinida - Inoceramidae
Inoceramus aff. subundatus Meek 1861
Anderson 1958
Bivalvia - Arcida - Parallelodontidae
Arca breweriana Gabb 1864
recombined as Nanonavis breweriana
Bivalvia - Arcida - Cucullaeidae
Cucullaea truncata Gabb 1864
recombined as Cucullaea (Cyphoxis) truncata
Bivalvia - Arcida - Glycymerididae
Axinaea veatchii n. sp. Gabb 1864
recombined as Glycymerita veatchii
Glycymeris shastensis Anderson 1958
Anderson 1958
Bivalvia - Trigoniida - Megatrigoniidae
Trigonia evansii (Meek 1864)
recombined as Pterotrigonia evansana
Bivalvia - Trigoniida - Steinmanellidae
Trigonia tryoniana n. sp. Gabb 1864
recombined as Yaadia tryoniana
Bivalvia - Carditida - Astartidae
Astarte tuscana n. sp. Gabb 1864
Venus veatchii n. sp. Gabb 1864
recombined as Eriphyla veatchii
Bivalvia - Cardiida - Veneridae
"Aphrodina" varians (Gabb 1864)
Anderson 1958
recombined as Calva (Calva) varians
Bivalvia - Cardiida - Mactridae
Mactra ashburnerii Gabb 1864
recombined as Cymbophora ashburnerii
Bivalvia - Cardiida - Tancrediidae
Meekia sella Gabb 1864
recombined as Meekia (Meekia) sella
Meekia radiata Gabb 1864
recombined as Meekia (Meekia) radiata
Bivalvia - Cardiida - Tellinidae
Tellina quadrata n. sp. Gabb 1864
Bivalvia - Pholadida - Corbulidae
Corbula traskii Gabb 1864
recombined as Caryocorbula traskii
Bivalvia - Pholadida - Pholadidae
Martesia clausa Gabb 1864
Bivalvia - Hiatellida - Hiatellidae
Panopaea concentrica Gabb 1864
Bivalvia - Lucinida - Mactromyidae
? Loripes dubia Gabb 1864
recombined as Clisocolus dubius
Bivalvia - Nuculida - Nuculidae
Acila demessa Finlay 1927
Anderson 1958
recombined as Acila (Truncacila) demessa
Bivalvia - Nuculanida - Sareptidae
Nucula truncata Gabb 1864
synonym of Portlandia arctica
Gastropoda - Neritidae
Nerita cuneata n. sp. Gabb 1864
recombined as Neritina (Dostia) cuneata
Gastropoda - Neogastropoda - Volutidae
Volutoderma dilleri (White 1889)
Anderson 1958
recombined as Carota dilleri
Fusus averillii n. sp. Gabb 1864
recombined as Volutoderma averillii
Volutilithes navarroensis n. sp. Gabb 1864
    = Volutoderma californica n. sp. Dall 1907
Dall 1907
synonym of Volutoderma averillii
Volutoderma gabbi (White 1889)
Anderson 1958
synonym of Volutoderma averillii
Gastropoda - Neogastropoda - Perissityidae
Perissolax brevirostris Gabb 1864
recombined as Perissitys brevirostris
Gastropoda - Neogastropoda - Buccinidae
Neptunea ponderosa n. sp. Gabb 1864
recombined as Eripachya ponderosa
Gastropoda - Ficidae
Ficus cypraeoides n. sp. Gabb 1864
synonym of Sycodes glabra
Gastropoda - Aporrhaidae
Tessarolax distorta n. sp. Gabb 1864
Aporrhais falciformis n. sp. Gabb 1864
recombined as Anchura falciformis
Pugnellus hamulus Gabb 1864
Anderson 1958
recombined as Pyktes hamulus
Gastropoda - Cassidae
Haydenia impressa n. gen., n. sp. Gabb 1864
Gastropoda - Naticidae
Gyrodes expansa Gabb 1864
Gastropoda - Turritellidae
Turritella seriatimgranulata Roemer 1849
Turritella robusta n. sp. Gabb 1864
Gastropoda - Pleuroceridae
Turritella veatchii n. sp. Gabb 1864
recombined as Elimia veatchii
Gastropoda - Ampullinidae
Amauropsis oviformis Gabb 1864
recombined as Ampullina oviformis
Gastropoda - Opisthobranchia - Cylichnidae
Scaphander costatus (Gabb 1864)
Anderson 1958
recombined as Scaphander (Mirascapha) costatus
Gastropoda - Heterostropha - Ringiculidae
Cinulia obliqua n. sp. Gabb 1864
recombined as Biplica obliqua
Cinulia pinguis Gabb 1864
recombined as Ringicula (Ringicula) pinguis
Gastropoda - Heterostropha - Architectonicidae
Architectonica veatchii n. sp. Gabb 1864
Gastropoda - Turbinidae
Architectonica inornata Gabb 1864
recombined as Atira inornata
Angaria ornatissima Gabb 1864
recombined as Atira ornatissima
Cephalopoda - Ammonitida - Mojsisovicsiidae
Ammonites peruvianus von Buch 1839
recombined as Oxytropidoceras peruvianum
Cephalopoda - Ammonitida - Baculitidae
Baculites chicoensis Trask 1856
Anderson 1958
see common names

Geography
Country:United States State/province:California County:Tehama
Coordinates: 40.2° North, 122.1° West (view map)
Paleocoordinates:44.4° North, 86.1° West
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period:Cretaceous Epoch:Late/Upper Cretaceous
Stage:Coniacian 10 m.y. bin:Cretaceous 6
Key time interval:Coniacian
Age range of interval:89.80000 - 86.30000 m.y. ago
Stratigraphy
Geological group:Asuncion
Stratigraphic resolution:bed
Stratigraphy comments: Small area of Chico beds brought to the surface by an anticline with steep dips to the northeast and southwest. I think this is correlated to the Forbes Shale of Petroleum and Cow Creeks.
Lithology and environment
Primary lithology: "siliciclastic"
Lithology description: Unknown lithology, probably coarse siliciclastic.
Environment:coastal indet.
Geology comments: Near shore facies.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:selective quarrying,field collection,survey of museum collection
Reason for describing collection:biostratigraphic analysis
Collection method comments: Collected and initially described by Gabb (1864). This collection represents a partly emended and enlarged list by more recent collections.
Taxonomic list comments:Exhaustive list. Emended taxonomy from Gabb (1864)
Metadata
Also known as:LACMIP loc. 10865
Database number:44232
Authorizer:A. Hendy, J. Marcot Enterer:A. Hendy, J. Marcot
Modifier:J. Marcot Research group:marine invertebrate
Created:2004-09-06 11:25:26 Last modified:2021-09-13 17:32:51
Access level:the public Released:2004-09-06 11:25:26
Creative Commons license:CC BY
Reference information

Primary reference:
59878. W. M. Gabb. 1864. Description of the Cretaceous fossils. Geological Survey of California Palaeontology 1:57-217 [M. Clapham/M. Clapham]

Secondary references:

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]
77960 W. H. Dall. 1907. Notes on some Upper Cretaceous Volutidæ, with descriptions of new species and a revision of the groups to which they belong . Smithsonian Miscellaneous Collections 50:1-23 [J. Marcot/J. Marcot]