Bear Flat: Late/Upper Pleistocene, Canada
collected by R. J. Hebda, M. Geertsema 2001
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia
- Rodentia
- Sciuridae
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Tamiasciurus hudsonicus
(Erxleben 1777)
|
1 specimen | ||||||
Mammalia
- Rodentia
- Cricetidae
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Peromyscus maniculatus
(Wagner 1843)
|
20 specimens | ||||||
Microtus pennsylvanicus
(Ord 1815)
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16 specimens | ||||||
Microtus xanthognathus
(Leach 1815)
|
46 specimens | ||||||
Clethrionomys gapperi
(Vigors 1830)
|
23 specimens | ||||||
Mammalia
- Lagomorpha
- Leporidae
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Lepus americanus
Erxleben 1777
|
13 specimens | ||||||
see common names |
Geography
Country: | Canada | State/province: | British Columbia |
Coordinates: | 56.3° North, 121.2° West (view map) | ||
Paleocoordinates: | 56.3° North, 121.2° West | ||
Basis of coordinate: | stated in text | ||
Geographic resolution: | small collection |
Time
Period: | Quaternary | Epoch: | Pleistocene |
10 m.y. bin: | Cenozoic 6 | ||
Key time interval: | Late/Upper Pleistocene | ||
Age range of interval: | 0.12600 - 0.01170 m.y. ago | ||
Age estimate: | 12567 ± 49 to 11507 ± 52 YBP (14C) |
Stratigraphy
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: "at a depth of 241-265 cm below surface" and the bones "yielded uncalibrated radiocarbon ages of 11 507 ± 52 years BP (AA46353) and 12 567 ± 49 years BP (AA43652)" |
Lithology and environment
Primary lithology: | silty claystone |
Lithology description: "prismatic silty-clay" | |
Environment: | "floodplain" |
Glacial or sequence phase: | late glacial |
Geology comments: "formed by mudflows and sheet flooding" |
Taphonomy
Modes of preservation: | body,bone collector |
Size of fossils: | macrofossils,mesofossils |
Feeding/predation traces: | gastric dissolution |
Collection methods and comments
Collection methods: | bulk,sieve,field collection | ||
Minimum sieve size: | 0.500 | ||
Reason for describing collection: | biostratigraphic analysis | ||
Collectors: | R. J. Hebda, M. Geertsema | Collection dates: | 2001 |
Collection method comments: "blocks of sediment were collected and bagged, then... washed with a gentle spray of water on a 500 [micro]m screen" |
Metadata
Database number: | 83951 | ||
Authorizer: | J. Alroy | Enterer: | J. Alroy |
Modifier: | J. Alroy | Research group: | vertebrate |
Created: | 2008-09-10 14:26:26 | Last modified: | 2010-01-14 18:47:17 |
Access level: | the public | Released: | 2008-09-10 14:26:26 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
28120. | R. J. Hebda, J. A. Burns, M. Geertsema and A. J. T. Jull. 2008. AMS-dated late Pleistocene taiga vole (Rodentia: Microtus xanthognathus) from northeast British Columbia, Canada: a cautionary lesson in chronology. Canadian Journal of Earth Sciences 45(5):611-618 [J. Alroy/J. Alroy] |