Forbes Shale - Cow Creek, Yolo: Coniacian, California

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Myalinida - Inoceramidae
Inoceramus subundatus Meek 1861
Cephalopoda - Ammonitida - Tetragonitidae
Lytoceras (Gaudryceras) alamedense (Smith 1889)
Cephalopoda - Ammonitida - Baculitidae
Baculites sp. Lamarck 1799
Baculites inornatus Meek 1862
see common names

Geography
Country:United States State/province:California County:Shasta
Coordinates: 40.5° North, 122.2° West (view map)
Paleocoordinates:44.6° North, 86.2° West
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period:Cretaceous Epoch:Late/Upper Cretaceous
Stage:Coniacian 10 m.y. bin:Cretaceous 6
Key time interval:Coniacian
Age range of interval:89.80000 - 86.30000 m.y. ago
Stratigraphy
Geological group:Asuncion Formation:Forbes
Stratigraphic resolution:bed
Stratigraphy comments: 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.
Lithology and environment
Primary lithology: lithified "shale"
Includes fossils?Y
Lithology description: Shale.
Environment:marine indet.
Geology comments: No paleoenvironmental data reported.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:selective quarrying,field collection
Reason for describing collection:biostratigraphic analysis
Collection method comments: Collected by Dobbins and Anderson; identified by Anderson.
Taxonomic list comments:Probably not exhaustive, but representative.
Metadata
Database number:44234
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:J. Marcot Research group:marine invertebrate
Created:2004-09-06 11:38:11 Last modified:2020-11-06 14:12:39
Access level:the public Released:2004-09-06 11:38:11
Creative Commons license:CC BY
Reference information

Primary reference:
11610. F. M. Anderson. 1958. Upper Cretaceous of the Pacific Coast. Geological Society of America Memoir 71:1-378 [A. Miller/A. Hendy/M. Clapham]