Mecca (RV-7713): Early/Lower Hemingfordian, Oregon
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Mammalia
- Perissodactyla
- Equidae
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Parahippus aff. leonensis
Sellards 1916
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Parahippus pawniensis
Gidley 1907
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Mammalia
- Merycoidodontidae
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Merychyus cf. arenarum
Cope 1884
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Mammalia
- Palaeomerycidae
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Barbouromeryx submilleri
Frick 1937
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= Bouromeryx submilleri
Frick 1937
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Alroy 2002 | ||||||
| see common names | |||||||
Geography
| Country: | United States | State/province: | Oregon | County: | Jefferson |
| Coordinates: | 44.8° North, 121.3° West (view map) | ||||
| Paleocoordinates: | 44.6° North, 115.2° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | small collection |
Time
| Period: | Neogene | Epoch: | Miocene |
| Stage: | Burdigalian | 10 m.y. bin: | Cenozoic 5 |
| *Period: | Tertiary | *Local age/stage: | Early/Lower Hemingfordian |
| Key time interval: | Early/Lower Hemingfordian | ||
| Age range of interval: | 18.50000 - 16.30000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
Lithology and environment
| Primary lithology: | tuffaceous,brown silty sandstone |
| Lithology description: "blocky to nodular weathering, moderately resistant, finely to very coarsely grained, beige and brown, silty and tuffaceous sandstone, which is thickly but poorly bedded and poorly sorted" | |
| Environment: | terrestrial indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | surface (in situ),field collection |
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: "Many specimens were collected in-place" | |
| Taxonomic list comments:stratigraphically mixed lists for RV-7712 and CIT 37 are omitted; they include an indeterminate canid and the type of Michenia deschutensis available KA dates of 23.4 +/- 3.3 and 22.7 +/- 2.7 Ma on plagioclase are imprecise and stratigraphically incongruent | |
Metadata
| Database number: | 17966 | ||
| Authorizer: | J. Alroy | Enterer: | J. Alroy |
| Modifier: | J. Alroy | Research group: | vertebrate |
| Created: | 1993-09-27 00:00:00 | Last modified: | 2004-03-17 13:04:37 |
| Access level: | the public | Released: | 1993-09-27 00:00:00 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 1367. | L. Dingus. 1990. Systematics, stratigraphy, and chronology for mammalian fossils (Late Arikareean to Hemingfordian) from the uppermost John Day Formation, Warm Springs, Oregon. PaleoBios 12(47/48):1-24 [J. Alroy/J. Alroy/J. Alroy] |
Secondary references:
| 6294 | J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari] |