USGS DR 2524, De Long Mountains [Siksikpuk Fm]: Serpukhovian, Alaska
collected by Dumoulin 2000
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Protozoa
- Latentifistularia
- Ruzhencevispongidae
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Scharfenbergia ruestae
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| replaced by Wonia | |||||||
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Protozoa
- Entactinaria
- Entactiniidae
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Belowea variabilis
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| synonym of Entactinosphaera | |||||||
| see common names | |||||||
Geography
| Country: | United States | State/province: | Alaska |
| Coordinates: | 68.1° North, 162.8° West (view map) | ||
| Paleocoordinates: | 32.9° North, 11.3° West | ||
| Basis of coordinate: | based on nearby landmark | ||
| Geographic resolution: | outcrop |
Time
| Period: | Carboniferous | Epoch: | Mississippian |
| Stage: | Serpukhovian | 10 m.y. bin: | Carboniferous 3 |
| Key time interval: | Serpukhovian | ||
| Age range of interval: | 330.90000 - 323.20000 m.y. ago |
Stratigraphy
| Geological group: | Etivluk | Formation: | Siksikpuk | ||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From the Siksikpuk Formation of the Etivluk Gp. AGE: late Late Mississippian to early Middle Pennsylvanian (Chesterian to Morrowan); placed here in the Serpukhovian to avoid stratigraphic orhaning. STRATIGRAPHIC POSITION: Siksikpuk Formation, lower subunit, 0.5 m above 00AD20A. | |||||
Lithology and environment
| Primary lithology: | gray,green lithified chert |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Medium-gray to olive-gray chert, weathers moderate brown. Thin section shows scattered to abundant radiolarians filled with chalcedony or polycrystalline quartz; some fairly well-preserved with sharp margins. LITHIFICATION: Lithified, on the basis of facies description and preparation techniques. | |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection | ||
| Reason for describing collection: | biostratigraphic analysis | ||
| Museum repositories: | USNM | ||
| Collectors: | Dumoulin | Collection dates: | 2000 |
| Collection method comments: COLLECTOR: J. A. Dumoulin. REPOSITORY: Presumably USNM. | |||
| Taxonomic list comments:COVERAGE: Exhaustive for radiolarians, possibly including conodonts and other macrofossils. NOMENCLATURE: Identified by C. D. Blome; not an authoritative publication, but with modern nomenclature and species-resolution identifications. | |||
Metadata
| Also known as: | 00AD20C; Loc. 72 | ||
| Database number: | 91035 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy | Research group: | micropaleontology |
| Created: | 2009-09-01 08:24:17 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | the public | Released: | 2009-09-01 08:24:17 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 30624. | J. A. Dumoulin, A. G. Harris, C. D. Blome and L. E. Young. 2006. Conodont and radiolarian data from the De Long Mountains Quadrangle and adjacent areas, northern Alaska. United States Geological Survey Open-File Report 2006(106):1-174 [A. Hendy/A. Hendy] |