Ayo Ayo tuff, La Paz: Piacenzian, Bolivia

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Mylodontidae
Scelidodon cf. tarijensis Gervais and Ameghino 1880
Mammalia - Cervidae
Cervidae indet. Gray 1821
Mammalia - Panameriungulata - Macraucheniidae
Macrauchenia cf. patachonica Owen 1838
see common names

Geography
Country:Bolivia State/province:La Paz
Coordinates: 19.0° South, 66.2° West (view map)
Paleocoordinates:18.8° South, 65.5° West (Wright 2013)
Basis of coordinate:based on nearby landmark
Altitude:3794 meters
Geographic resolution:small collection
Time
Period: Neogene Epoch: Pliocene
Stage: Piacenzian 10 m.y. bin: Cenozoic 6
Key time interval: Piacenzian
Age range of interval: 3.6 - 2.58 m.y. ago
Age estimate: 2.8 Ma (K-Ar)
Stratigraphy
Formation:Umala Member:Ayo Ayo
Stratigraphic resolution:group of beds
Stratigraphy comments: 2.8 Myr Ayo Ayo tuff, which correspond to the base and the top of the Umala Formation and roughly coincide with the Pliocene (Marshall & Sempéré, 1991).
Lithology and environment
Primary lithology: tuff
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,mesofossils
Collection methods and comments
Reason for describing collection:general faunal/floral analysis
Metadata
Database number:70653
Authorizer:D. Croft Enterer:D. Weinstein
Modifier:M. Kouvari Research group:vertebrate
Created:2007-04-01 15:22:09 Last modified:2025-02-22 15:12:02
Access level:the public Released:2007-04-01 15:22:09
Creative Commons license:CC0
Reference information

Primary reference:
19694. L. G. Marshall and T. Sempere. 1991. The Eocene to Pleistocene vertebrates of Bolivia and their stratigraphic context: a review. In R. Suárez-Soruco (ed.), Fósiles y Facies de Bolivia - Vol. 1 Vertebrados (Revista Ténica de YPFB) 12(3-4):631-652 [D. Croft/D. Weinstein/S. Bruning]