USGS Loc. 9976, Chitina Valley [Kennicott Fm]: Early/Lower Albian, Alaska
collected by Moffit 1916
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
- Ammonitida
- Desmoceratidae
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Callizoniceras (Wollemanniceras) alaskanum
Imlay 1960
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Cephalopoda
- Ammonitida
- Tetragonitidae
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Gabbioceras sp.
Hyatt 1900
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| see common names | |||||||
Geography
| Country: | United States | State/province: | Alaska | County: | Valdez-Cordova |
| Coordinates: | 61.5° North, 143.3° West (view map) | ||||
| Paleocoordinates: | 55.3° North, 84.5° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Early/Lower Cretaceous |
| Stage: | Albian | 10 m.y. bin: | Cretaceous 4 |
| Key time interval: | Early/Lower Albian | ||
| Age range of interval: | 113.00000 - 109.90000 m.y. ago |
Stratigraphy
| Formation: | Kennicott | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From Kennicott Fm, which is overlain by unnamed lower Cretaceous strata and he Matanuska Fm. AGE: Early or early Middle Albian; on the basis of ammonoid biostratigraphy. STRATIGRAPHIC POSITION: From unknown position within regional section. | |||||
Lithology and environment
| Primary lithology: | brown lithified sandstone |
| Secondary lithology: | gray poorly lithified "shale" |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Massive brown sandstone and crumbly gray shale. LITHIFICATION: Lithified, on the basis of figured specimens. | |
| Environment: | marine indet. |
| Geology comments: ENVIRONMENT: Not stated in text, but apparently shallow marine siliciclastic. | |
Taphonomy
| Modes of preservation: | body,mold/impression |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection excludes: | some macrofossils | ||
| Collection methods: | surface (in situ),survey of museum collection | ||
| Reason for describing collection: | taxonomic analysis | ||
| Museum repositories: | USNM | ||
| Collectors: | Moffit | Collection dates: | 1916 |
| Collection method comments: COLLECTOR: Moffit, 1916. REPOSITORY: USNM. | |||
| Taxonomic list comments:COVERAGE: Exhaustive for ammonoids, possibly including bivalves. NOMENCLATURE: Authoritative publication, with relatively modern nomenclature and species-resolution identifications. | |||
Metadata
| Database number: | 88056 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2009-03-31 07:04:21 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | the public | Released: | 2009-03-31 07:04:21 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 29582. | R. W. Imlay. 1960. Early Cretaceous (Albian) ammonites from the Chitna Valley and Talkeetna Mountains, Alaska. United States Geological Survey Professional Paper 354(D):87-114 [A. Hendy/A. Hendy/P. Wagner] |