Kiligwa River (USGS Mes. loc. 23697): Kimmeridgian - Early/Lower Tithonian, 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 rugosa
(Fischer 1837)
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| original and current combination Buchia rugosa | |||||||
| see common names | |||||||
Geography
| Country: | United States | State/province: | Alaska |
| Coordinates: | 68.7° North, 158.4° West (view map) | ||
| Paleocoordinates: | 78.0° North, 43.8° West | ||
| Geographic resolution: | small collection |
Time
| Period: | Jurassic | Epoch: | Late/Upper Jurassic |
| *Period: | Late/Upper Jurassic | *Epoch: | Malm |
| *International age/stage: | Middle Kimmeridgian - Early/Lower Tithonian | *Local age/stage: | Early/Lower Portlandian (minimum) |
| Key time interval: | Kimmeridgian - Early/Lower Tithonian | ||
| Age range of interval: | 154.80000 - 146.30000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Tiglukpuk | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Probably near base of overturned section. | |||||
Lithology and environment
| Primary lithology: | shelly/skeletal lithified "limestone" | ||
| Secondary lithology: | cherty/siliceous "shale" | ||
| Lithology description: coquinoid limestone in sequence of shale, chert and chert breccia. | |||
| 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 [foreland basin?]. IT was bounded on the N by the Barrow Platform..." | |||
Taphonomy
| Modes of preservation: | body,coquina |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | biostratigraphic analysis |
| Museum repositories: | USGS |
Metadata
| Database number: | 5202 | ||
| Authorizer: | J. Alroy | Enterer: | M. Sommers |
| Modifier: | J. Alroy | Research group: | marine invertebrate |
| Created: | 1999-09-02 13:49:47 | Last modified: | 2008-12-16 21:06:24 |
| Access level: | the public | Released: | 1999-09-02 13:49:47 |
| 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] |