Asher Section (285 ft.): early Late Arikareean, Oregon

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Merycoidodontidae
cf. Paroreodon sp. Thorpe 1921
Mammalia - Rodentia - Heteromyidae
Schizodontomys sp. Rensberger 1973
see common names

Geography
Country:United States State/province:Oregon County:Wheeler
Coordinates: 44.8° North, 119.7° West (view map)
Paleocoordinates:44.5° North, 110.8° West
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
10 m.y. bin:Cenozoic 4-5
Key time interval:early Late Arikareean
Age range of interval:29.50000 - 18.50000 m.y. ago
Stratigraphy
Formation:John Day Member:Haystack Valley
Regional section:JohnD Regional bed:8
Regional order:bottom to top
Stratigraphic resolution:bed
Lithology and environment
Primary lithology:gray,green tuff
Lithology description: olive-gray ribbed tuff
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:biostratigraphic analysis
Metadata
Also known as:Haystack Valley Member
Database number:36856
Authorizer:J. Alroy, J. Marcot Enterer:J. Alroy, J. Marcot
Modifier:J. Alroy Research group:vertebrate
Subset of collection #:17925
Created:2004-02-17 16:07:41 Last modified:2004-02-17 18:07:41
Access level:the public Released:2004-02-17 16:07:41
Creative Commons license:CC BY
Reference information

Primary reference:
9853. R. M. Hunt, Jr. and E. Stepleton. 2004. Geology and paleontology of the upper John Day beds, John Day river valley, Oregon: lithostratigraphic and biochronologic revision in the Haystack Valley and Kimberly areas (Kimberly and Mt. Misery quadrangles). Bulletin of the American Museum of Natural History 282:1-90 [J. Alroy/J. Alroy/J. Alroy]