Hansen Bluff PP2: Middle Pleistocene, Colorado

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Amphibia - Temnospondyli - Urodela
Ambystoma tigrinum (Green 1825)
Amphibia - Temnospondyli - Pelobatidae
Scaphiopus bombifrons Cope 1863
recombined as Spea bombifrons
Amphibia - Temnospondyli - Ranidae
Rana sp. Linnaeus 1758
"blairi or R. pipiens"
Rana catesbeiana Shaw 1802
Amphibia - Temnospondyli - Bufonidae
Bufo sp. Laurenti 1768
Bufo cognatus
Bufo woodhousei Girard 1854
Reptilia - Colubridae
Thamnophis sp. Fitzinger 1843
Thamnophis elegans
Thamnophis sirtalis Linnaeus
Reptilia - Iguanidae
Sceloporus undulatus (Bosc 1802)
Holbrookia maculata
Mammalia - Rodentia - Sciuridae
Spermophilus richardsonii (Sabine 1822)
recombined as Urocitellus richardsonii
Spermophilus lateralis (Say 1823)
recombined as Callospermophilus lateralis
Mammalia - Rodentia - Cricetidae
Pitymys meadensis Hibbard 1944
    = Terricola meadensis Hibbard 1944
Alroy 2002
recombined as Microtus meadensis
Microtus paroperarius Hibbard 1944
Ondatra annectens (Brown 1908)
Clethrionomys sp. Tilesius 1850
    = Phenacomys sp. Merriam 1889
Bell and Barnosky 2000
Synaptomys meltoni Paulson 1961
    = Mictomys meltoni Paulson 1961
Alroy 2002
Mammalia - Rodentia - Geomyidae
Geomys sp. Rafinesque 1817
Mammalia - Lagomorpha - Leporidae
Leporidae indet. Fischer de Waldheim 1817
Mammalia - Soricidae
Sorex arcticus Kerr 1792
Mammalia - Perissodactyla - Equidae
Equus sp. Linnaeus 1758
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
Formation:Alamosa
Local section:Hansn Local bed:1
Local order:bottom to top
Stratigraphic resolution:bed
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:20369
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]
1055 C. J. Bell and A. D. Barnosky. 2000. The microtine rodents from the Pit locality in Porcupine Cave, Park County, Colorado. Annals of Carnegie Museum 69(2):93-134 [J. Alroy/J. Alroy/J. Ju]