USGS Mesozoic loc. 2919, 20764: Bathonian - Callovian, Alaska
collected by G.C. Martin; T.W. Stanton, L. Martin; C.E. Kirschner 1903; 1904; 1946
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Bivalvia
- Trigoniida
- Myophorellidae
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Myophorella devexa
Eichwald 1871
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| Hypotype USNM 219886-219890 | ||||||||||
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Myophorella orientalis
Kobayashi and Tamura 1955
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Vaugonia doroschini
(Eichwald 1871)
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| original and current combination Trigonia doroschini | ||||||||||
| Hypotype USNM 219919 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Alaska |
| Coordinates: | 59.7° North, 153.4° West (view map) | ||
| Paleocoordinates: | 30.8° North, 86.5° West | ||
| Basis of coordinate: | based on nearby landmark |
Stratigraphy
| Formation: | Bowser | ||||
| Stratigraphy comments: From Poulton, 1979
2919 & 3034 - Probably Bathonian 20764 - Bathonian (Imlay, pers. com., 1977) 3035 - Bathonian or Callovian 3038 - Callovian, Bowser Formation according to Imlay (1926); revised to Bathonian (Imlay, pers. com., 1977); zone A of section of Martin (1926, p. 145) |
Lithology and environment
| Primary lithology: | "shale" |
| Secondary lithology: | sandstone |
| Lithology description: From Martin, 1926: "Zone B" : Shale with several fossil bands containing Trigonia doroschini, etc 50 ft. Concealed. "Zone A": Shale with several fossil beds each 10 to 25 inches thick and packed with fossils; Trigonia doroschini, T. devexa, etc, 30 ft. Concealed. From Detterman and Hartsock, 1966: "The heterogenous assemblage of rocks assigned to the Bowser Formation includes massive units of cliffforming graywacke-type sandstone and pebble-cobble conglomerate, thin-bedded, poorly consolidated shale, and massive siltstone. The character is further confused by rapid facies changes." | |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,mesofossils,microfossils |
Collection methods and comments
| Collection methods: | survey of museum collection | ||
| Reason for describing collection: | taxonomic analysis | ||
| Museum repositories: | USGS,USNM | ||
| Collectors: | G.C. Martin; T.W. Stanton, L. Martin; C.E. Kirschner | Collection dates: | 1903; 1904; 1946 |
Metadata
| Also known as: | USGS 3035, 3038, 3034 | ||
| Database number: | 139465 | ||
| Authorizer: | G. Stanley | Enterer: | H. Shepherd |
| Modifier: | H. Shepherd | ||
| Created: | 2013-02-12 06:15:54 | Last modified: | 2013-02-13 15:42:26 |
| Access level: | the public | Released: | 2013-02-12 06:15:54 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 40842. | T. P. Poulton. 1979. Jurassic Trigoniid Bivalves from Canada and Western United States of America. Geological Survey of Canada Bulletin 282 [G. Stanley/H. Shepherd/H. Shepherd] |