USGS Mesozoic 398, Chico Creek (Cretaceous of the United States)

Where: Butte County, California (39.8° N, 121.7° W: paleocoordinates 47.1° N, 89.7° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

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

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified siliciclastic sediments

Size class: macrofossils

Reposited in the USNM

Primary reference: D. L. Jones. 1963. Upper Cretaceous (Campanian and Maestrichtian) ammonites from southern Alaska. United States Geological Survey Professional Paper 432:1-53 [L. Ivany/L. Ivany/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 158389: authorized by Matthew Clapham, entered by Matthew Clapham on 19.07.2014, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Ammonoidea -
Ammonitida indet. Hyatt 1889 ammonite
as "Ammonites sp."
 Ammonitida - Baculitidae
Baculites chicoensis Trask 1856 ammonite
 Ammonitida - Pachydiscidae
Canadoceras newberryanum Meek 1858 ammonite
Gastropoda
 Heterostropha - Ringiculidae
"Cinulia obliqua" = Biplica obliqua
"Cinulia obliqua" = Biplica obliqua Gabb 1864 snail
 Epitonioidea - Epitoniidae
"Ceratia nexilia" = Acirsa nexilia
"Ceratia nexilia" = Acirsa nexilia White 1889 wentletrap
 Neogastropoda - Perissityidae
"Perissolax brevirostris" = Perissitys brevirostris
"Perissolax brevirostris" = Perissitys brevirostris Gabb 1864 snail
 Sorbeoconcha - Ficidae
"Sycodes cypraeoides" = Sycodes glabra
"Sycodes cypraeoides" = Sycodes glabra Shumard 1858 fig shell
 Sorbeoconcha - Naticidae
Gyrodes expansa Gabb 1864 moon snail
Bivalvia
 Cardiida - Cardiidae
"Cardium (Protocardia) placerensis" = Protocardia placerensis
"Cardium (Protocardia) placerensis" = Protocardia placerensis Gabb 1864 cockle
 Cardiida - Mactridae
Mactra sp. Linnaeus 1767 clam
Cymbophora ashburnerii Gabb 1864 clam
as "Mactra (Cymbophora) ashburneri"
 Cardiida - Veneridae
"Chione varians" = Calva (Calva) varians
"Chione varians" = Calva (Calva) varians Gabb 1864 venus clam
 Lucinida - Mactromyidae
Clisocolus dubius Gabb 1864 clam
 Carditida - Astartidae
"Crassatella tuscana" = Astarte tuscana
"Crassatella tuscana" = Astarte tuscana Gabb 1864 clam
 Pectinida - Pectinoidae
Pectinidae indet. Wilkes 1810 scallop
as "Pecten sp."
 Myalinida - Inoceramidae
Inoceramus whitneyi Gabb 1869 clam
Rostellites
  -
Rostellites gabbi White 1903