USGS M5064, Baldwin Creek (Miocene of the United States)

Where: Santa Cruz County, California (37.0° N, 122.1° W: paleocoordinates 33.7° N, 114.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Lompico Sandstone Formation, Langhian (16.0 - 13.8 Ma)

• Near base of Lompico Sandstone. Up to 240 m thick; intertongues with Monterey Formation; angular unconformity with Butano Sandstone below; noncomformably overlies crystaline basement in places, also Locatelli Formation and Zayante Sandstone; conformably overlain by Monterey Formation

• bed-level stratigraphic resolution

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

• A transgressive sandstone unit.
• Thick-bedded to massive yellowish-gray arkosic sandstone; light-gray, moderately sorted, granular medium-grained, biotite bearing arkosic sandstone

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 37523: 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
 Sessilia - Balanidae
Balanus sp. Da Costa 1778 barnacle
 Pectinida - Pectinoidae
Pecten sp. Müller 1776 scallop
 Ostreida - Ostreidae
Ostrea sp. Linnaeus 1758 oyster
 Neogastropoda - Olividae
Oliva sp. Bruguière 1789 olive snail
 Naticoidea - Naticidae
? Polinices sp. Monfort 1810 moon snail