KJ88107: Lancian, 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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Trochodendroides nebrascensis leaf
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1 specimen | |||||||||
| HC103 | ||||||||||
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Angiospermae
- Nymphaeales
- Nymphaeaceae
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Paranymphaea hastata leaf
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1 specimen | |||||||||
| HC111 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | North Dakota | County: | Bowman |
| Coordinates: | 46.0° North, 103.8° West (view map) | ||||
| Paleocoordinates: | 52.2° North, 77.3° West | ||||
| Basis of coordinate: | stated in text | ||||
| Altitude: | 3105 feet | ||||
| Geographic resolution: | small collection |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Maastrichtian | 10 m.y. bin: | Cretaceous 8 | *Epoch: | Late/Upper Senonian |
| *International age/stage: | Late/Upper Maastrichtian | *Local age/stage: | Lancian |
| Key time interval: | Lancian | Zone: | HCIII |
| Age range of interval: | 72.10000 - 66.00000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Hell Creek | ||||
| Local section: | 88106 | ||||
| Regional section: | Marmarth Composite | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: -3.1m to Hell Creek-Fort Union contact datum, -3.1m to K-T boundary based on calculations in Johnson (2002) | |||||
Lithology and environment
| Primary lithology: | poorly lithified siltstone | ||
| Includes fossils? | Y | ||
| Environment: | crevasse splay | Tectonic setting: | cratonic basin |
Taphonomy
| Modes of preservation: | adpression |
| Size of fossils: | macrofossils |
| Spatial orientation: | random |
| Temporal resolution: | snapshot |
| Spatial resolution: | allochthonous |
Collection methods and comments
| Collection methods: | selective quarrying,mechanical,field collection |
| Collection size: | 2 specimens |
| Reason for describing collection: | general faunal/floral analysis |
| Collection method comments: Specimens located at Yale Peabody Museum | |
Metadata
| Database number: | 25916 | ||
| Authorizer: | K. Johnson | Enterer: | M. Reynolds |
| Modifier: | M. Reynolds | Research group: | paleobotany |
| Created: | 2002-09-28 14:50:54 | Last modified: | 2003-05-30 03:08:45 |
| Access level: | the public | Released: | 2002-09-28 14:50:54 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 7941. | K. R. Johnson. 2002. Megaflora of the Hell Creek and lower Fort Union Formations in the western Dakotas: Vegetational response to climate change, the Cretaceous-Tertiary boundary event, and rapid marine transgression. The Hell Creek Formation and the Cretaceous-Tertiary boundary in the northern Great Plains: An integrated continental record of the end of the Cretaceous. 361:329-391 [S. Wing/S. Wing/K. Johnson] |
Secondary references:
| 6985 | K. R. Johnson. 2002. Personal field work re: HC and FU formations. [K. Johnson/M. Reynolds/M. Reynolds] |