Where: Tehama County, California (38.8° N, 122.8° W: paleocoordinates 40.0° N, 83.4° W)
• coordinate based on nearby landmark
• hand sample-level geographic resolution
When: Early/Lower Cenomanian (99.6 - 93.5 Ma)
• Franciscan chert complex
• group of beds-level stratigraphic resolution
Environment/lithology: basinal (siliceous); lithified chert
Size class: microfossils
Preservation: original silica
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 54111: authorized by Wolfgang Kiessling, entered by Martin Riess on 23.09.2005
Creative Commons license: CC BY (attribution)
Taxonomic list
| Protozoa | |
|
Thanarla veneta Squinabol 1903 radiolarian
Thanarla elegantissima Cita 1964 radiolarian | |
Holocryptocanium astiensis, Holocryptocanium geysersensis, Holocryptocanium tuberculatum, Holocryptocanium barbui
Holocryptocanium astiensis radiolarian
Holocryptocanium geysersensis radiolarian
Holocryptocanium tuberculatum radiolarian
Holocryptocanium barbui Dumitrica 1970 radiolarian | |
|
Novixitus mclaughlini radiolarian | |