MNA Loc. 992: BM 8: Late/Upper Cenomanian, Arizona
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
- Ammonitida
- Acanthoceratidae
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Metoicoceras geslinianum
(d'Orbigny 1841)
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Bivalvia
- Ostreida
- Bakevelliidae
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Gervillia navajovus n. sp.
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Bivalvia
- Ostreida
- Gryphaeidae
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Gryphaeostrea elderi n. sp.
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Bivalvia
- Myalinida
- Inoceramidae
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Inoceramus flavus
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| see common names | |||||||
Geography
| Country: | United States | State/province: | Arizona | County: | Navajo |
| Coordinates: | 36.2° North, 109.8° West (view map) | ||||
| Paleocoordinates: | 37.3° North, 73.0° West | ||||
| Basis of coordinate: | stated in text |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Cenomanian | 10 m.y. bin: | Cretaceous 5 |
| Key time interval: | Late/Upper Cenomanian | ||
| Age range of interval: | 100.50000 - 93.90000 m.y. ago |
Stratigraphy
| Formation: | Mancos Shale | Member: | lower shale | Local bed: | BM 8 |
| Local order: | bottom to top | ||||
| Regional section: | Black Mesa | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Stratigraphic details in Kirkland 1990 and 1991
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Lithology and environment
| Primary lithology: | lithified "shale" | ||
| Secondary lithology: | concretionary lithified "carbonate" | ||
| Includes fossils? | Y | ||
| Environment: | basinal (siliceous) | Tectonic setting: | foreland basin |
| Glacial or sequence phase: | parasequence boundary |
Taphonomy
| Modes of preservation: | mold/impression,recrystallized,replaced with calcite |
| Size of fossils: | macrofossils,microfossils |
| Preservation of anatomical detail: | poor |
| Abundance in sediment: | common |
| Disassociated major elements: | some |
Collection methods and comments
| Collection excludes: | some microfossils |
| Collection methods: | bulk,selective quarrying,field collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | NMMNH |
Metadata
| Database number: | 55435 | ||
| Authorizer: | P. Harries | Enterer: | P. Harries |
| Modifier: | P. Harries | Research group: | marine invertebrate |
| Created: | 2005-10-23 02:24:06 | Last modified: | 2005-10-23 05:26:27 |
| Access level: | the public | Released: | 2005-10-23 02:24:06 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 14403. | J. I. Kirkland. 1996. Paleontology of the Greenhorn cylcothem (Cretaceous: late Cenomanian to middle Turonian) at Black Mesa, northeastern Arizona. New Mexico Museum of Natural History and Science Bulletin 9:1-131 [P. Harries/P. Harries/P. Harries] |