Shaviovik River (USGS Mes. loc. 21026): Late Oxfordian - Early Kimmeridgian, Alaska
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Bivalvia
- Pectinida
- Buchiidae
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Aucella spitiensis
Holdhaus 1913
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Aucella concentrica
White 1888
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| see common names | |||||||
Geography
| Country: | United States | State/province: | Alaska |
| Coordinates: | 69.4° North, 146.5° West (view map) | ||
| Paleocoordinates: | 73.5° North, 52.4° West | ||
| Geographic resolution: | small collection |
Time
| Period: | Jurassic | Epoch: | Late Jurassic |
| Stage: | Oxfordian - Kimmeridgian | 10 m.y. bin: | Jurassic 5 |
| *Period: | Late/Upper Jurassic | *Epoch: | Malm |
| *International age/stage: | Late/Upper Oxfordian - Early/Lower Kimmeridgian | ||
| Key time interval: | Late Oxfordian - Early Kimmeridgian | ||
| Age range of interval: | 157.9 - 152.2 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Kingak Shale |
| Stratigraphic resolution: | bed |
Lithology and environment
| Primary lithology: | black lithified "shale" | ||
| Secondary lithology: | ironstone | ||
| Lithology description: black shale containing nodules and interbeds of ironstone and some limestone | |||
| Environment: | marine indet. | Tectonic setting: | foreland basin |
| Geology comments: "[These sediments] were deposited in an eastward-trending trough about 150 mi wide...the trough was bounded on the S by a rising landmass from which most of the sediments were derived. It was bounded on the N by the Barrow Platform..." [ergo, foreland basin] | |||
Taphonomy
| Modes of preservation: | body |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | biostratigraphic analysis |
| Museum repositories: | USGS |
Metadata
| Database number: | 5231 | ||
| Authorizer: | J. Alroy | Enterer: | M. Sommers | Research group: | marine invertebrate |
| Created: | 1999-09-02 17:58:32 | Last modified: | 2001-08-30 17:52:51 |
| Access level: | the public | Released: | 2000-11-20 13:53:25 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 313. | R. W. Imlay. 1955. Characteristic Jurassic Mollusks from northern Alaska. United States Geological Survey Professional Paper 274-D:69-96 [J. Alroy/M. Sommers] |