CAS 61938 - Ditch Creek Mbr, Hornbrook Fm: Coniacian, California
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Gastropoda
- Turritellidae
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Turritella hearni
Merriam 1941
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see common names |
Geography
Country: | United States | State/province: | California | County: | Siskiyou |
Coordinates: | 41.7° North, 122.5° West (view map) | ||||
Paleocoordinates: | 48.5° North, 88.0° West | ||||
Basis of coordinate: | based on nearby landmark | ||||
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
Formation: | Hornbrook | Member: | Ditch Creek | ||
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: STRATIGRAPHIC RELATIONS: From Ditch Creek Member of the Hornbrook Formation. Further details published in Saul (1982) and Squires and Saul 2003, 2004). AGE: Cenomanian based on molluscan biostratigraphy. STRATIGRAPHIC POSITION: Unknown position within member. |
Lithology and environment
Primary lithology: | lithified siltstone |
Includes fossils? | Y |
Lithology description: GENERAL LITHOLOGY: SIltstone, based on lithostratigraphic unit name "Ditch Creek Siltstone Mbr". LITHIFICATION: Assumed lithified based on lithologic description and figured specimens. | |
Environment: | offshore |
Geology comments: ENVIRONMENT: In general regarded as shallow water, though some units includes assemblages displaced into deeper waters through turbidity currents. Here assigned to a siliciclastic offshore environments on the basis of lithology. |
Taphonomy
Modes of preservation: | body,original aragonite |
Size of fossils: | macrofossils |
Collection methods and comments
Collection methods: | survey of museum collection |
Reason for describing collection: | taxonomic analysis |
Museum repositories: | CAS |
Collection method comments: COLLECTOR: Unknown collected. REPOSITORY: CAS, California. | |
Taxonomic list comments:COVERAGE: Only includes Turritella (Gastropoda), therefore very limited. NOMENCLATURE: Authoritative publication with species-level assignments. |
Metadata
Database number: | 69612 | ||
Authorizer: | A. Hendy | Enterer: | A. Hendy | Research group: | marine invertebrate |
Created: | 2007-02-28 07:05:49 | Last modified: | 2013-11-25 13:37:23 |
Access level: | the public | Released: | 2007-02-28 07:05:48 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
18617. | R. L. Squires and L. R. Saul. 2006. Additions and refinements to Aptian to Santonian (Cretaceous) Turritella (Mollusca: Gastropoda) from the Pacific Slope of North America. The Veliger 48(1):46-60 [A. Miller/A. Hendy] |