Where: Santa Clara County, California (37.3° N, 122.1° W: paleocoordinates 30.9° N, 60.6° W)

• coordinate based on nearby landmark

• hand sample-level geographic resolution

When: Middle Jurassic (174.7 - 161.5 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 185423: authorized by Matthew Clapham, entered by Matthew Clapham on 22.04.2017

Creative Commons license: CC BY (attribution)