USGS D11598, Section 16 [Smoky Hill Shale Mbr, Niobrara Fm]: Santonian, New Mexico
collected by Scott, Cobban, Merewether, Buckhorn 1984
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Cephalopoda
- Ammonitida
- Baculitidae
|
|||||||
Baculites sp.
Lamarck 1799
|
|||||||
Cephalopoda
- Ammonitida
- Scaphitidae
|
|||||||
Haresiceras (Mancosiceras) sp.
()
|
|||||||
Bivalvia
- Myalinida
- Inoceramidae
|
|||||||
Inoceramus sp.
Sowerby 1814
|
|||||||
see common names |
Geography
Country: | United States | State/province: | New Mexico | County: | Colfax |
Coordinates: | 36.7° North, 104.4° West (view map) | ||||
Paleocoordinates: | 40.9° North, 71.8° West | ||||
Basis of coordinate: | based on nearby landmark | ||||
Geographic resolution: | outcrop |
Time
Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
Stage: | Santonian | 10 m.y. bin: | Cretaceous 6 |
Key time interval: | Santonian | ||
Age range of interval: | 86.30000 - 83.60000 m.y. ago |
Stratigraphy
Formation: | Niobrara | Member: | Smoky Hill Shale | ||
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: STRATIGRAPHIC RELATIONS: From the Smoky Hill Shale Mbr of the Niobrara Fm, which regionally overlies the Fort Hays Limestone. AGE: Santonian, on the basis of inoceramid and ammonite biostratigraphy; Prionocyclus quadratus biozone. STRATIGRAPHIC POSITION: Bed 2, in the lower shale unit, from near base of section. |
Lithology and environment
Primary lithology: | gray,red or brown lithified "limestone" |
Includes fossils? | Y |
Lithology description: SPECIFIC LITHOLOGY: Limestone, gray, weathers orange, platy, dense, breaks with conchoidal fracture where unweathered. LITHIFICATION: Lithified, on the basis of figured specimens. | |
Environment: | offshore |
Geology comments: ENVIRONMENT: Offshore marine siliciclastic environment. |
Taphonomy
Modes of preservation: | body,cast,mold/impression |
Size of fossils: | macrofossils |
Collection methods and comments
Collection methods: | field collection | ||
Reason for describing collection: | general faunal/floral analysis | ||
Museum repositories: | UNSM | ||
Collectors: | Scott, Cobban, Merewether, Buckhorn | Collection dates: | 1984 |
Collection method comments: COLLECTORS: Scott, Cobban, Merewether, and Buckhorn (1984). REPOSITORY: USNM. | |||
Taxonomic list comments:COVERAGE: Probably not exhaustive, but comprising representative and common bivalves and cephalopods. NOMENCLATURE: Not an authoritative publication, but with modern nomenclature, and identifications to species-level. |
Metadata
Database number: | 82269 | ||
Authorizer: | A. Hendy | Enterer: | A. Hendy | Research group: | marine invertebrate |
Created: | 2008-07-25 14:21:48 | Last modified: | 2013-11-25 13:37:23 |
Access level: | the public | Released: | 2008-07-25 14:21:48 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
27708. | G. R. Scott, W. A. Cobban, and E. A. Merewether. 1986. Stratigraphy of the Upper Cretaceous Niobrara Formation in the Raton basin, New Mexico. New Mexico Bureau of Mines and Mineral Resources Bulletin 115:1-34 [A. Hendy/A. Hendy] |