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
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
Cephalopoda | |
Baculites sp. Lamarck 1799 ammonite
Baculites inornatus Meek 1862 ammonite | |
Lytoceras (Gaudryceras) alamedense Smith 1889 ammonite | |
Bivalvia | |
Inoceramus subundatus Meek 1861 clam |