Otter Creek (USNM 14066a): Clarkforkian, North Dakota
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Angiospermae
- Saxifragales
- Cercidiphyllaceae
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Cercidiphyllum genetrix leaf
(Newberry 1868)
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3 specimens | |||||||||
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Angiospermae
- Fagales
- Betulaceae
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Corylus acutertiaria leaf
Hickey 1977
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1 specimen | |||||||||
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Angiospermae
- Rosales
- Ulmaceae
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Chaetoptelea microphylla leaf
(Newberry 1868)
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84 specimens | |||||||||
| marginal and ultimate venation | ||||||||||
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Angiospermae
- Malvales
- Sterculiaceae
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Penosphyllum cordatum leaf
(Ward 1885)
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1 specimen | |||||||||
| leaf fragment | ||||||||||
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Angiospermae
- Vitales
- Vitaceae
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"Ampelopsis" acerifolia leaf
(Newberry 1868)
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1 specimen | |||||||||
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Coniferales
- Cupressaceae
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Glyptostrobus europaeus leaf
(Brongniart 1833)
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4 specimens | |||||||||
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Metasequoia occidentalis axis, leaf
Chaney 1951
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19 specimens | |||||||||
| taxodioid foliage | ||||||||||
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Polypodiopsida
- Equisetales
- Equisetaceae
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Equisetum magnum n. sp. axis, root
Hickey 1977
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54 specimens | |||||||||
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unclassified
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"Viburnum" cupanioides leaf
Manchester et al. 1999
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3 specimens | |||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | North Dakota | County: | Oliver |
| Coordinates: | 47.0° North, 101.6° West (view map) | ||||
| Paleocoordinates: | 51.2° North, 81.5° West | ||||
| Basis of coordinate: | estimated from map | ||||
| Geographic resolution: | small collection |
Time
| Period: | Paleogene | ||
| 10 m.y. bin: | Cenozoic 1-2 | ||
| *Period: | Early/Lower Tertiary - Middle Tertiary | *Epoch: | Paleocene | *Local age/stage: | Clarkforkian |
| Key time interval: | Clarkforkian | ||
| Age range of interval: | 56.2 - 54.9 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Golden Valley | Member: | Bear Den | ||
| Regional section: | Williston | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Abundant remains of Paleocene fossil plants occurred in the gray zone. A thin lignite is represented by b layer of discoidal siderite concretions. | |||||
Lithology and environment
| Primary lithology: | concretionary,sideritic conglomeratic "shale" |
| Includes fossils? | Y |
| Lithology description: Dominantly interchannel conglomeritc shale, with sideritic concretions, and some lignite, siltstone, and shale | |
| Environment: | "channel" |
Taphonomy
| Modes of preservation: | adpression |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | good |
| Temporal resolution: | snapshot |
| Spatial resolution: | parautochthonous |
Collection methods and comments
| Collection methods: | selective quarrying,field collection |
| Collection size: | 170 specimens |
| Reason for describing collection: | paleoecologic analysis |
| Museum repositories: | USNM |
Metadata
| Database number: | 10811 | ||
| Authorizer: | H. Sims | Enterer: | S. Ostrowski |
| Modifier: | H. Sims | Research group: | paleobotany |
| Created: | 2001-06-25 11:54:15 | Last modified: | 2003-07-22 13:04:57 |
| Access level: | the public | Released: | 2001-06-25 11:54:15 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 4023. | ETE 425 | L. J. Hickey. 1977. Stratigraphy and paleobotany of the Golden Valley Formation (Early Tertiary) of western North Dakota. The Geological Society of America Memoir 150:1-183 [H. Sims/S. Ostrowski/J. Cassara] |