Little Knife River (USNM 14116): Clarkforkian, North Dakota

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Angiospermae - Oxalidales - Oxalidaceae
Averrhoites affinis leaf (Newberry 1868)
7 specimens
see common names

Geography
Country:United States State/province:North Dakota County:Mountrail
Coordinates: 48.1° North, 102.5° West (view map)
Paleocoordinates:52.5° North, 82.1° 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
Lithology and environment
Primary lithology: conglomeratic "shale"
Secondary lithology: siltstone
Includes fossils?Y
Lithology description: Dominantly interchannel shale and siltstone; sandstone (conglomeritic)
Environment:"channel"
Taphonomy
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:7 specimens
Reason for describing collection:paleoecologic analysis
Museum repositories:USNM
Metadata
Database number:10978
Authorizer:H. Sims Enterer:S. Ostrowski
Modifier:C. Visaggi Research group:paleobotany
Created:2001-07-08 22:13:26 Last modified:2004-03-11 16:25:10
Access level:the public Released:2001-07-08 22:13:26
Creative Commons license:CC BY
Reference information

Primary reference:
4023.ETE 425L. 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]