Where: San Mateo County, California (37.1° N, 122.3° W: paleocoordinates 36.8° N, 120.7° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Sandstone Member (Purisima Formation), Messinian to Messinian (7.2 - 3.6 Ma)
• Purisima Formation in its type area is as much as 1725 m thick; Diatom floras in Purisima Fm are diagnostic of a late Miocene and early Pliocene age.
• bed-level stratigraphic resolution
Environment/lithology: offshore; diatomaceous, tuffaceous, gray, yellow siltstone and volcaniclastic, gray, blue 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 37554: authorized by Austin Hendy, entered by Austin Hendy on 16.03.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Echinoidea | |
Dendraster gibbsi sand dollar |