USGS MR8846A pebble, Mt. Eden Road (Jurassic of the United States)

Where: Santa Clara County, California (37.3° N, 122.1° W: paleocoordinates 26.3° N, 57.7° W)

• coordinate based on nearby landmark

• hand sample-level geographic resolution

When: Pliensbachian (190.8 - 182.7 Ma)

• Franciscan pebble in Santa Clara Formation conglomerate

• bed-level stratigraphic resolution

Environment/lithology: basinal (siliceous); lithified, red chert

Size class: microfossils

Reposited in the USGS

Primary reference: E. V. Kohnen and B. L. Murchey. 1995. Age and origin of red chert pebbles in the lower part of the Santa Clara Formation, northern California. In E. M. Sangines, D. W. Andersen, A. B. Buising (eds.), Recent Geologic Studies in the San Francisco Bay Area 76:77-86 [M. Clapham/M. Clapham]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 185424: authorized by Matthew Clapham, entered by Matthew Clapham on 22.04.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Radiolaria
 Nassellaria - Eucyrtidiellidae
"Eucyrtidiellum aff. unumaensis" = Eucyrtidiellum unumaense
"Eucyrtidiellum aff. unumaensis" = Eucyrtidiellum unumaense Yao 1979 radiolarian
 Nassellaria - Bagotidae
? Canutus sp. Pessagno and Whalen 1982 radiolarian
 Nassellaria - Hsuidae
Parahsuum (Lupherium) simplum Yao 1982 radiolarian
 Nassellaria - Syringocapsidae
Katroma sp. Pessagno and Poisson 1981 radiolarian