CAS 29491, Garzas Creek (Cretaceous of the United States)

Where: Stanislaus County, California (37.2° N, 121.2° W: paleocoordinates 37.0° N, 81.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Panoche Formation, Cenomanian (100.5 - 93.9 Ma)

• Age given as Early Turonian, but ammonites are Cenomanian.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, conglomeratic sandstone

Size class: macrofossils

Reposited in the CAS

Primary reference: W. P. Elder and J. W. Miller. 1993. Map and checklists of Jurassic and Cretaceous macrofossil localities within the San Jose 1:100,000 Quadrangle, California, and discussion of paleontological results. United States Geological Survey Open-File Report 93-503:1-49 [M. Clapham/M. Clapham]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 185726: authorized by Matthew Clapham, entered by Matthew Clapham on 10.05.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Arcida - Glycymerididae
 Myalinida - Inoceramidae
 Mytilida - Mytilidae
Modiolus sp. Lamarck 1801 mussel
 Pholadida - Corbulidae
Corbulidae indet. Lamarck 1818 clam
 Pholadida - Pholadidae
? Martesia sp. Sowerby 1824 clam
 Cardiida - Mactridae
Cymbophora sp. Gabb 1868 clam
 Cardiida - Veneridae
? Legumen sp. Conrad 1858 venus clam
 Cardiida - Tancrediidae
 Lucinida - Lucinidae
? Lucinidae indet. Fleming 1828 clam
 Trigoniida - Megatrigonioidae
Pterotrigonia sp. van Hoepen 1929 clam
 Nuculida - Nuculidae
Acila (Truncacila) sp. Grant and Gale 1931 divaricate nutclam
Gastropoda
 Opisthobranchia - Retusidae
"Cylichnina sp." = Retusa (Cylichnina)
"Cylichnina sp." = Retusa (Cylichnina) Monterasato 1884 snail
 Heterostropha - Ringiculidae
Biplica cf. isoplicata Popenoe 1957 snail
 Trochoidea - Trochidae
? Margarites sp. Gray 1847 top snail
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium sp. Linnaeus 1758 tusk shell
Cephalopoda
 Ammonitida - Muniericeratidae
? Tragodesmoceras sp. Spath 1922 ammonite
 Ammonitida - Desmoceratidae
Puzosia sp. Bayle 1878 ammonite
 Ammonitida - Baculitidae
"Sciponoceras cf. kossmati" = Sciponoceras gracile
"Sciponoceras cf. kossmati" = Sciponoceras gracile Shumard 1860 ammonite
 Ammonitida - Nostoceratidae
? Hyphantoceras sp. Hyatt 1900 ammonite