Hansen Bluff CT1: Middle Pleistocene, Colorado
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Amphibia
- Temnospondyli
- Pelobatidae
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Scaphiopus bombifrons
Cope 1863
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| recombined as Spea bombifrons | ||||||||||
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Amphibia
- Temnospondyli
- Ranidae
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Rana sp.
Linnaeus 1758
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| "blairi or R. pipiens" | ||||||||||
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Rana catesbeiana
Shaw 1802
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Amphibia
- Temnospondyli
- Bufonidae
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Bufo sp.
Laurenti 1768
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Bufo cognatus
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Amphibia
- Temnospondyli
- Urodela
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Ambystoma tigrinum
(Green 1825)
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Reptilia
- Colubridae
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Thamnophis sp.
Fitzinger 1843
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Heterodon nasicus
Baird and Girard 1852
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Reptilia
- Iguanidae
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Holbrookia maculata
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Mammalia
- Perissodactyla
- Equidae
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Equus cf. scotti
Gidley 1900
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| synonym of Equus (Hesperohippus) mexicanus | ||||||||||
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Mammalia
- Soricidae
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Microsorex sp.
Preble 1910
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= Sorex sp.
Linnaeus 1758
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Alroy 2002 | |||||||||
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Mammalia
- Rodentia
- Cricetidae
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Neotoma ozarkensis
Brown 1908
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Pitymys meadensis
Hibbard 1944
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= Terricola meadensis
Hibbard 1944
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Alroy 2002 | |||||||||
| recombined as Microtus meadensis | ||||||||||
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Microtus paroperarius
Hibbard 1944
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Mammalia
- Rodentia
- Sciuridae
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Spermophilus richardsonii
(Sabine 1822)
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| recombined as Urocitellus richardsonii | ||||||||||
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Mammalia
- Rodentia
- Geomyidae
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Geomys sp.
Rafinesque 1817
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| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Colorado | County: | Alamosa |
| Coordinates: | 37.4° North, 105.8° West (view map) | ||||
| Paleocoordinates: | 37.4° North, 105.8° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Altitude: | 2300 meters | ||||
| Geographic resolution: | small collection |
Time
| Period: | Quaternary | Epoch: | Pleistocene |
| Stage: | Chibanian | 10 m.y. bin: | Cenozoic 6 | *Epoch: | Middle Pleistocene | *Local age/stage: | Late/Upper Irvingtonian |
| Key time interval: | Middle Pleistocene | ||
| Age range of interval: | 0.77400 - 0.12900 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
Lithology and environment
| Primary lithology: | sandstone |
| Environment: | fine channel fill |
| Geology comments: "in stream channels or in small, lake-filled relict channels" | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | mesofossils |
| Disassociated minor elements: | some |
Collection methods and comments
| Collection methods: | bulk,sieve,field collection |
| Reason for describing collection: | paleoecologic analysis |
Metadata
| Also known as: | Alamosa | ||
| Database number: | 20359 | ||
| Authorizer: | J. Alroy | Enterer: | J. Alroy | Research group: | vertebrate |
| Created: | 1993-02-18 00:00:00 | Last modified: | 2002-12-16 13:14:24 |
| Access level: | the public | Released: | 1993-02-18 00:00:00 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 2939. | K. L. Rogers, C. A. Repenning, R. M. Forester, E. E. Larson, S. A. Hall, G. R. Smith, E. Anderson and T. J. Brown. 1985. Middle Pleistocene (late Irvingtonian: Nebraskan) climatic changes in south-central Colorado. National Geograpic Research 1(4):535-563 [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] |