Crooked Creek (USNM 14091): Wasatchian, North Dakota
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Angiospermae
- Proteales
- Nelumbonaceae
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Nelumbo aureavallis leaf
Hickey 1977
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2 specimens | ||||||
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Angiospermae
- Typhales
- Sparganiaceae
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Sparganium stygium seed repro, seed/fruit
Heer 1855
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1 specimen | ||||||
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Angiospermae
- Oxalidales
- Oxalidaceae
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Averrhoites affinis leaf
(Newberry 1868)
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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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3 specimens | ||||||
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Angiospermae
- Malvales
- Sterculiaceae
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Dombeya novimundi leaf
Hickey 1977
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3 specimens | ||||||
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Lycopodiopsida
- Isoetales
- Isoetaceae
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Isoetites horridus leaf, megaspore
(Dawson 1883)
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6 specimens | ||||||
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Polypodiopsida
- Schizaeales
- Lygodiaceae
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Lygodium kaulfussi leaf, non-seed repro
Heer
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1 specimen | ||||||
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Polypodiopsida
- Salviniales
- Salviniaceae
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Salvinia preauriculata leaf
Berry 1925
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9 specimens | ||||||
| see common names | |||||||
Geography
| Country: | United States | State/province: | North Dakota | County: | Dunn |
| Coordinates: | 47.2° North, 102.8° West (view map) | ||||
| Paleocoordinates: | 51.1° North, 84.5° West | ||||
| Basis of coordinate: | estimated from map | ||||
| Geographic resolution: | small collection |
Time
| Period: | Paleogene | Epoch: | Eocene |
| Stage: | Ypresian | 10 m.y. bin: | Cenozoic 2 |
| *Period: | Early/Lower Tertiary | *Local age/stage: | Wasatchian |
| Key time interval: | Wasatchian | ||
| Age range of interval: | 54.9 - 50.5 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Golden Valley | Member: | Camels Butte |
| Regional section: | Williston |
| Stratigraphic resolution: | bed |
Lithology and environment
| Primary lithology: | yellow claystone |
| Includes fossils? | Y |
| 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: | 26 specimens |
| Reason for describing collection: | paleoecologic analysis |
| Museum repositories: | USNM |
Metadata
| Database number: | 10973 | ||
| Authorizer: | H. Sims | Enterer: | S. Ostrowski |
| Modifier: | H. Sims | Research group: | paleobotany |
| Created: | 2001-07-08 21:41:55 | Last modified: | 2003-07-22 15:00:09 |
| Access level: | the public | Released: | 2001-07-08 21:41:55 |
| 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] |