Kukpowruk River 96-22: Albian, Alaska
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Birisia alata
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| occurs in mudstones | ||||||||||
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Gnetopsida
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Pityophyllum ex gr. nordenskioldii
(Heer 1899)
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| misspelling Pityophyllum nordenskioeldi | ||||||||||
| occurs in mudstone (long and short leaves) and sandstone | ||||||||||
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Polypodiopsida
- Equisetales
- Equisetaceae
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Equisetites ex gr. burejensis
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| occurs in mudstones | ||||||||||
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Coniferales
- Podocarpaceae
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Podozamites spp.
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| occurs abundantly in siltstone (large leaves); also occurs in ironstones within coals | ||||||||||
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Ginkgoopsida
- Ginkgoales
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Sphenobaiera ex gr. longifolia
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| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Alaska | County: | western North Slope |
| Coordinates: | 69.3° North, 162.6° West (view map) | ||||
| Paleocoordinates: | 80.0° North, 92.0° West | ||||
| Basis of coordinate: | stated in text | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Early/Lower Cretaceous |
| Stage: | Albian | 10 m.y. bin: | Cretaceous 4 |
| Key time interval: | Albian | ||
| Age range of interval: | 113.00000 - 100.50000 m.y. ago |
Stratigraphy
| Formation: | Kukpowruk | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: lower to middle Albian | |||||
Lithology and environment
| Primary lithology: | brown,gray silty mudstone | ||
| Secondary lithology: | burrows,fine sandstone | ||
| Lithology description: Description. Heavily rooted, grey/brown, silty mudstone with an incipient nodular texture containing abundant large Podozamites and long and short Pityphyllum leaves, Birisia fronds, and Equisetites. This passes up into coals with ironstone nodules. The ironstones contain abundant Podozamites. These pass up into sandstones with burrows. Long-leafed Pityophyllum occurred in fine-grained sandstones below the siltstone. Sample 96 RAS 116 represents Pityophyllum from the sandstones. Interpretation. Vegetated floodplain environment. | |||
| Environment: | "floodplain" | Tectonic setting: | foreland basin |
Taphonomy
| Size of fossils: | macrofossils |
| Temporal resolution: | time-averaged |
| Spatial resolution: | parautochthonous |
Collection methods and comments
| Collection methods: | selective quarrying,field collection,observed (not collected) |
| Reason for describing collection: | general faunal/floral analysis |
| Collection method comments: Material stored at the Earth Sciences Department, The Open University, collection # 96 RAS. | |
Metadata
| Also known as: | Kukpowruk River/Cape Lisburne floras | ||
| Database number: | 34371 | ||
| Authorizer: | D. Royer | Enterer: | D. Royer |
| Modifier: | D. Royer | Research group: | paleobotany |
| Created: | 2003-08-28 07:26:08 | Last modified: | 2003-08-28 10:26:08 |
| Access level: | the public | Released: | 2003-08-28 07:26:08 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 8854. | R. A. Spicer and A. B. Herman. 2001. The Albian-Cenomanian flora of the Kukpowruk River, western North Slope, Alaska: stratigraphy, palaeofloristics, and plant communities. Cretaceous Research 22:1-40 [D. Royer/D. Royer/D. Royer] |