Where: Tehama County, California (39.9° N, 122.5° W: paleocoordinates 37.6° N, 71.6° W)

• coordinate based on nearby landmark

• hand sample-level geographic resolution

When: Valanginian to Valanginian (140.2 - 136.4 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 pyrite

Collection methods: chemical, hydrochloric, 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 54042: authorized by Wolfgang Kiessling, entered by Martin Riess on 22.09.2005