Where: California (35.1° N, 120.2° W: paleocoordinates 30.5° N, 65.5° W)

• coordinate based on nearby landmark

• hand sample-level geographic resolution

When: Unit 3 Formation (Volcanopelagic Succession Group), Late/Upper Tithonian (150.8 - 145.0 Ma)

• Zone 4 alpha - revision of chronostratigraphic assignment based on Baumgartner et al. (1995) and Kiessling et al. (1999)

• bed-level stratigraphic resolution

Environment/lithology: basinal (siliceous); lithified, argillaceous mudstone

Size class: microfossils

Preservation: original silica

Collection methods: bulk, hydrochloric,

• Radiolarians only - rare, 1-2 specimens; common, 3-10 specimens; abundant, > 10 specimens

Primary reference: D. M. Hull. 1997. Upper Jurassic Tethyan and Southern Boreal radiolarians from western North America. Micropaleontology 43(S2):1-202 [W. Kiessling/W. Kiessling/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 50753: authorized by Wolfgang Kiessling, entered by Wolfgang Kiessling on 20.05.2005

Creative Commons license: CC BY (attribution)