USGS M5049, Zayante Creek (Oligocene to of the United States)

Where: Santa Cruz County, California (37.1° N, 122.0° W: paleocoordinates 35.8° N, 114.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Vaqueros Sandstone Member (San Lorenzo Formation), Chattian to Chattian (28.1 - 20.4 Ma)

• Above basalt flows with in Vaqueros Sandstone. Vaqueros Sandstone is up to 920 m thick conformably overlies the Rice Mudstone and overlain by the Lambert Shale. Zemorrian (Oligocene) and Saucesian (early Miocene) age.

• bed-level stratigraphic resolution

Environment/lithology: coastal; fine-grained, medium, gray sandstone

• Contains a series of pillow basalt flows.
• Primarily thick-bedded to massive, moderately sorted, slightly granular medium-grained to well-sorted fine-grained, arkosic sandstone. The sandstone is light gray to medium gray when fresh and yellowish gray when weathered.

Size class: macrofossils

Reposited in the UMMP

Collection methods: quarrying,

• Also collections at USGS, Menlo Park

Primary reference: J. C. Clark. 1981. Stratigraphy, paleontology, and geology of the Central Santa Cruz Mountains, California Coast Ranges. United States Geological Survey Professional Paper 1168:1-51 [A. Miller/A. Hendy/R. McClees-Funinan]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 37517: authorized by Austin Hendy, entered by Austin Hendy on 16.03.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Representative for molluscan, echinoid and cirriped taxa; does not include mentioned foraminifera
Maxillopoda
 Sessilia - Balanidae
Balanus sp. Da Costa 1778 barnacle
Bivalvia
 Arcida - Arcidae
? Anadara sp. Gray 1847 ark
 Arcida - Glycymerididae
Glycymeris sp. Da Costa 1778 clam
 Pectinida - Pectinoidae
 Carditida - Crassatellidae
Crassatella granti Wiedey 1928 clam
 Cardiida - Veneridae
 Cardiida - Cardiidae
"Trachycardium vaquerosense" = Trachycardium (Trachycardium) vaquerosensis
"Trachycardium vaquerosense" = Trachycardium (Trachycardium) vaquerosensis Arnold 1908 cockle
Gastropoda
 Cephalaspidea - Cylichnidae
? Scaphander sp. Monfort 1810 snail
 Sorbeoconcha - Turritellidae
Turritella inezana turret shell
 Turbinoidea - Turbinidae
"Astraea aff. morani" = Astraea (Pomaulax) morani
"Astraea aff. morani" = Astraea (Pomaulax) morani Loel and Corey 1932 snail
Echinoidea
 Echinoida -
Echinoida indet. Troschel 1872 sea urchin