Cerros Negros Locality: Middle Pleistocene, Arizona

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Deroceras sp.
Bivalvia - Cardiida - Sphaeriidae
Pisidium sp. Pfeiffer 1821
Gastropoda - Heterostropha - Succineidae
Succinea sp. Draparnaud 1801
Gastropoda - Heterostropha - Vertiginidae
Vertigo sp. Muller 1774
Gastropoda - Heterostropha - Gastrocoptidae
Gastrocopta sp. Wollaston 1878
Gastropoda - Heterostropha - Planorbidae
Gyraulus sp. Charpentier 1837
Gastropoda - Heterostropha - Lymnaeidae
Fossaria sp. Westerlund 1885
Mammalia - Proboscidea - Elephantidae
Mammuthus columbi (Falconer 1857)
1 specimen
Manidble containing two molars
Mammalia - Proboscidea - Mammutidae
Mammut americanum (Kerr 1792)
1 specimen
Mandibular tooth & fragments of enamel
see common names

Geography
Country:United States State/province:Arizona
Coordinates: 32.5° North, 110.6° West (view map)
Paleocoordinates:32.5° North, 110.6° West
Time
Period:Quaternary Epoch:Pleistocene
10 m.y. bin:Cenozoic 6
Key time interval:Middle Pleistocene
Age range of interval:0.78100 - 0.12600 m.y. ago
Stratigraphy
Lithology and environment
Primary lithology:massive,pebbly,brown,white lithified conglomeratic,calcareous marl
Includes fossils?Y
Lithology description: A pale-brown, pebble-cobble conglomerate with a calcareous silty matrix and cement is the basal unit (<1 m thick). This basal addition, radiocarbon dates have been established. conglomerate grades upward into a pale-brown silty, clayey marl (±2.5 m thick) overlain by a white, massive marl (±1.5 m) containing lesser amounts of clay than the lower marl. Snails are >96 localities in Arizona (Saunders, 1970; Agenbroad and in the upper 3 m of marls, and the total thickness of 4 m has been dated at 27,000 to 12,000 years before present.
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Metadata
Database number:190076
Authorizer:M. Uhen Enterer:J. So
Modifier:J. So
Created:2017-11-27 13:57:52 Last modified:2017-11-29 11:22:45
Access level:the public Released:2017-11-27 13:57:52
Creative Commons license:CC BY
Reference information

Primary reference:

63917. L. D. Agenbroad, J. I. Mead, C. V. Haynes, Jr. and R. H. Hevly. 2013. Fossil fauna and flora from late Pleistocene Cerros Negros Locality, Pinal County, Arizona: With update of Mammuthus and all Mammut localities from Arizona. 58(1):50-53 [M. Uhen/J. So/M. Uhen]