ammonites

Zitarrosa: Callovian, Argentina

Where & when
Geology
Taphonomy & methods
Metadata & references
Geography
Country:Argentina State/province:Chubut
Coordinates: 43.4° South, 69.3° West (view map)
Paleocoordinates:40.4° South, 29.6° West
Basis of coordinate:based on nearby landmark
Geographic resolution:small collection
Time
Period:Jurassic Epoch:Middle Jurassic
Stage:Callovian 10 m.y. bin:Jurassic 5
Key time interval:Callovian
Age range of interval:164.7 - 161.2 m.y. ago
Stratigraphy
Formation:Cañadón Asfalto Member:Chacritas
Stratigraphic resolution:group of beds
Stratigraphy comments: "slightly lower in the sequence than the layer from which the mammal Asfaltomylos"
Lithology and environment
Primary lithology:gray lithified siltstone
Lithology description: "slabs" from "gray siltstones overlying basaltic levels"
Environment:lacustrine indet.
Geology comments: "lacustrine"
Taphonomy
Modes of preservation:body,adpression
Size of fossils:macrofossils
Collection methods and comments
Collection methods:survey of museum collection
Reason for describing collection:taxonomic analysis
Collection method comments: Museo Paleontólogico Egidio Feruglio of Trelew collection
Taxonomic list comments: frogs were found "in association with plants"
Metadata
Also known as:Cañadón Bagual
Database number:92115
Authorizer:J. Alroy Enterer:J. Alroy
Research group:vertebrate
Created:2009-11-01 11:42:42 Last modified:2009-11-01 11:42:42
Access level:the public Released:2009-11-01 11:42:41
Reference information
Primary reference:
31021 A. M. Báez and L. Nicoli. 2008. A new species of Notobatrachus (Amphibia, Salientia) from the Middle Jurassic of northwestern Patagonia. Journal of Paleontology 82(2):372-376 [J. Alroy/J. Alroy/J. Alroy]