Canning River (USGS Mesozoic Loc. 21025): Early Jurassic, Alaska
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Crinoidea
- Isocrinida
- Pentacrinitidae
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Pentacrinus subangularis
Miller 1821
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| var. alaska | ||||||||||
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Bivalvia
- Pectinida
- Oxytomidae
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Oxytoma sp.
(Meek and Hayden 1865)
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| "spp." | ||||||||||
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Bivalvia
- Pectinida
- Plicatulidae
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Plicatula sp.
Lamarck 1801
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| "spp." | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Alaska |
| Coordinates: | 69.6° North, 146.3° West (view map) | ||
| Paleocoordinates: | 62.8° North, 50.1° West | ||
| Geographic resolution: | small collection |
Time
| Period: | Jurassic | Epoch: | Early Jurassic |
| 10 m.y. bin: | Jurassic 1-3 | ||
| *Period: | Early/Lower Jurassic | ||
| Key time interval: | Early Jurassic | ||
| Age range of interval: | 201.4 - 174.7 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Kingak Shale | ||||
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Immediately overlying the Upper Triassic Shublik Fm. | |||||
Lithology and environment
| Primary lithology: | black lithified "shale" | ||
| Secondary lithology: | ironstone | ||
| Lithology description: black shale containing ironstone interbeds. | |||
| Environment: | marine indet. | Tectonic setting: | 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: | 5471 | ||
| Authorizer: | J. Alroy | Enterer: | M. Sommers | Research group: | marine invertebrate |
| Created: | 1999-10-04 14:00:51 | Last modified: | 2001-08-30 17:52:51 |
| Access level: | the public | Released: | 2000-11-20 13:53:26 |
| 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] |