Forbes Shale - Cow Creek, Yolo (Cretaceous of the United States)

Where: Shasta County, California (40.5° N, 122.2° W: paleocoordinates 44.6° N, 86.2° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Forbes Formation (Asuncion Group), Coniacian (89.8 - 86.3 Ma)

• Forbes Shale consists of clay shale and silty or sandy shale, with a thickness of 1300 ft or more. From shales fairly high in Forbes shale section.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified shale

• No paleoenvironmental data reported.
• Shale.

Size class: macrofossils

Collection methods: quarrying,

• Collected by Dobbins and Anderson; identified by Anderson.

Primary reference: F. M. Anderson. 1958. Upper Cretaceous of the Pacific Coast. Geological Society of America Memoir 71:1-378 [A. Miller/A. Hendy/M. Clapham]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 44234: authorized by Austin Hendy, entered by Austin Hendy on 06.09.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Probably not exhaustive, but representative.
Cephalopoda
 Ammonitida - Baculitidae
Baculites sp. Lamarck 1799 ammonite
Baculites inornatus Meek 1862 ammonite
 Ammonitida - Tetragonitidae
Bivalvia
 Myalinida - Inoceramidae
Inoceramus subundatus Meek 1861 clam