Where: Tehama County, California (39.9° N, 122.5° W: paleocoordinates 37.8° N, 71.7° W)

• coordinate based on nearby landmark

• hand sample-level geographic resolution

When: Early/Lower Valanginian to Early/Lower Valanginian (140.2 - 132.9 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: basinal (); lithified, gray mudstone and lithified, concretionary, gray, argillaceous limestone

Size class: microfossils

Preservation: replaced with calcite

Collection methods: chemical, hydroflouric,

Primary reference: E. Pessagno. 1977. Lower cretaceous radiolarian biostratigraphy of the Great Valley sequence and Franciscan complex, California coast ranges. Cushman Foundation for foraminiferal research, Special Publication (15)1-87 [W. Kiessling/M. Riess/M. Riess]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 54038: authorized by Wolfgang Kiessling, entered by Martin Riess on 22.09.2005

Creative Commons license: CC BY (attribution)