Upper Devonian, Alaska Range (38A M-F7) - Moffit (1954): Late/Upper Devonian, Alaska
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Stromatoporoidea
- Stromatoporida
- Stromatoporidae
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Stromatopora sp.
Goldfuss 1826
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Anthozoa
- Stauriida
- Phillipsastreidae
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Phillipsastraea sp.
d'Orbigny 1850
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| synonym of Phillipsastrea | |||||||
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Anthozoa
- Favositida
- Coenitidae
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Coenites sp.
Eichwald 1829
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Rhynchonellata
- Rhynchonellida
- Camarotoechiidae
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Camarotoechia sp.
Hall and Clarke 1893
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Rhynchonellata
- Pentamerida
- Gypidulidae
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Gypidula sp.
Hall 1867
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| see common names | |||||||
Geography
| Country: | United States | State/province: | Alaska | County: | Valdez-Codova |
| Coordinates: | 62.8° North, 142.2° West (view map) | ||||
| Paleocoordinates: | 10.5° South, 76.7° West | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Devonian | Epoch: | Late/Upper Devonian |
| 10 m.y. bin: | Devonian 4-5 | ||
| Key time interval: | Late/Upper Devonian | ||
| Age range of interval: | 382.70000 - 358.90000 m.y. ago |
Stratigraphy
| Local section: | Cheslina River | ||||
| Regional section: | Valdez-Codova | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: The beds do not constitute a well defined group, but are assigned to middle Devonian on the basis of faunal composition and stratigraphically associated units. Devonian rocks in the Buck Creek area comprise a variety of clastic sedimentary rocks, including shale, quartzite, grit, and others, which are associated with limestone beds. All the beds are folded and tilted. No estimate of thickness is not known, but probably is several thousand feet. | |||||
Lithology and environment
| Primary lithology: | coarse,gray,blue "limestone" |
| Includes fossils? | Y |
| Lithology description: Limestone is massive in structure, coarsely crystalline, and light bluish gray. Most of the group is made up of gray or black slate, hard gray siliceous beds, quartzite, yellowish sandy and gritty beds, chert conglomerate, and brown mica schist. | |
| Environment: | marine indet. |
| Geology comments: Beds are folded and locally are schistose, although not distinctly metamorphosed. | |
Taphonomy
| Modes of preservation: | cast |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection excludes: | all macrofossils |
| Collection methods: | selective quarrying,field collection |
| Reason for describing collection: | biostratigraphic analysis |
| Collection method comments: Collections submitted to Edwin Kirk for identification. | |
| Taxonomic list comments:Representative of poorly preserved fauna | |
Metadata
| Also known as: | #38A M-F7 | ||
| Database number: | 40666 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2004-06-26 13:08:04 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | the public | Released: | 2004-06-26 13:08:04 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 10955. | F.H. Moffit. 1954. Geology of the eastern part of the Alaska Range and adjacent area. United States Geological Survey Professional Paper 989(D) [A. Miller/A. Hendy/A. Hendy] |