Four Corners Section - 19: Late/Upper Cenomanian, New Mexico
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Polychaeta
- Sabellida
- Serpulidae
|
|||||||
|
Serpula intrica
|
4 individuals | ||||||
|
Cephalopoda
- Ammonitida
- Anisoceratidae
|
|||||||
|
Allocrioceras sp.
Spath 1926
|
1 individual | ||||||
|
Bivalvia
- Solemyida
- Solemyidae
|
|||||||
|
Solemya obscura
|
2 individuals | ||||||
|
Bivalvia
- Lucinida
- Lucinidae
|
|||||||
|
Lucina sp.
Bruguière 1797
|
1 individual | ||||||
|
Bivalvia
- Ostreida
- Gryphaeidae
|
|||||||
|
Gryphaeostrea sp.
Conrad 1865
|
1 individual | ||||||
|
Exogyra aff. acroumbonata
|
3 individuals | ||||||
|
Pycnodonte aff. kellumi
|
344 individuals | ||||||
|
Bivalvia
- Pectinida
- Plicatulidae
|
|||||||
|
Plicatula cf. ferryi
Coquand 1862
|
31 individuals | ||||||
| recombined as Plicatula (Plicatula) ferryi | |||||||
|
Bivalvia
- Myalinida
- Inoceramidae
|
|||||||
|
Inoceramus sp.
Sowerby 1814
|
1 individual | ||||||
|
Gastropoda
|
|||||||
|
Gastropoda indet.
Cuvier 1795
|
1 individual | ||||||
|
Gastropoda
- Turritellidae
|
|||||||
|
Turritella sp.
Lamarck 1799
|
4 individuals | ||||||
| see common names | |||||||
Geography
| Country: | United States | State/province: | New Mexico | County: | San Juan |
| Coordinates: | 36.5° North, 108.6° West (view map) | ||||
| Paleocoordinates: | 37.3° North, 71.6° 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 | ||||
| Stratigraphy comments: "to time equivalent [to the Upper Cenomanian Hartland Shale Member, Greenhorn Formation] proximal offshore deposits (prodelta and equivilants; Danke et al.,1993) of the Tropic and Mancos Shales (Utah and Arizona; Fig. 2)." |
Lithology and environment
| Primary lithology: | burrows lithified "shale" | ||
| Includes fossils? | Y | ||
| Lithology description: Tropic and Mancos Shales | |||
| Environment: | prodelta | Tectonic setting: | foreland basin |
| Geology comments: "proximal offshore deposits (prodelta and equivilants; Danke et al.,1993) ... During the Cenomanian and Turonian, foreland basin subsidence and tectonoeustatic sea-level rise resulted in widespread flooding of the Western Interior U.S." | |||
Taphonomy
| Modes of preservation: | body,mold/impression,original aragonite,original calcite |
| Size of fossils: | macrofossils,mesofossils,microfossils |
| Spatial orientation: | random |
| Preservation of anatomical detail: | good |
| Associated major elements: | some |
| Disassociated major elements: | many |
| Fragmentation: | frequent |
| Temporal resolution: | condensed |
| Spatial resolution: | parautochthonous |
Collection methods and comments
| Collection methods: | bulk,field collection |
| Reason for describing collection: | paleoecologic analysis |
Metadata
| Database number: | 44282 | ||
| Authorizer: | L. Ivany | Enterer: | P. Wall |
| Modifier: | M. Clapham | Research group: | marine invertebrate |
| Created: | 2004-09-08 09:23:55 | Last modified: | 2017-08-01 20:01:11 |
| Access level: | the public | Released: | 2004-09-08 09:23:55 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 11587. | B. S. Sageman and C. R. Bina. 1997. Diversity and Species Abundance Patterns in Late Cenomanian Black Shale Biofacies, Western Interior, U.S. Palaios 12:449-466 [L. Ivany/P. Wall/P. Wall] |