Cerro Caicayen 17: Valanginian, Argentina

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Ostreida - Ostreidae
Ostreidae indet. Rafinesque 1815
Bivalvia - Carditida - Astartidae
Eriphyla argentina Burckh and Weaver 1907
Bivalvia - Trigoniida - Myophorellidae
Steinmanella transitoria Steinmann 1881
Bivalvia - Trigoniida - Trigoniidae
Trigonia carinata
see common names

Geography
Country:Argentina
Coordinates: 39.0° South, 68.0° West (view map)
Paleocoordinates:38.0° South, 31.2° West
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period:Cretaceous Epoch:Early/Lower Cretaceous
Stage:Valanginian 10 m.y. bin:Cretaceous 1
Key time interval:Valanginian
Age range of interval:139.80000 - 132.90000 m.y. ago
Stratigraphy
Formation:Agrio Local bed:13
Local order:bottom to top
Stratigraphic resolution:bed
Stratigraphy comments: approx. 136 m above the base of the formation
Lithology and environment
Primary lithology:concretionary "shale"
Secondary lithology:shelly/skeletal calcareous packstone
Includes fossils?Y
Lithology description: shale with interbedded coquina (some of it sandy, calcareous or silty) also has some calcareous nodules
Environment:marine indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:taxonomic analysis
Metadata
Database number:37737
Authorizer:J. Alroy Enterer:E. Leckey
Modifier:E. Leckey Research group:marine invertebrate
Created:2004-03-22 16:35:18 Last modified:2004-03-22 18:35:18
Access level:the public Released:2004-03-22 16:35:18
Creative Commons license:CC BY
Reference information

Primary reference:

10016. M. B. Aguirre-Urreta and P. F. Rawson. 1999. Lower Cretaceous ammonites from the Neuquen Basin, Argentina: Viluceras, a new Valanginian subgenus of Olcostephanus. Cretaceous Research 20:343-357 [J. Alroy/E. Leckey/M. Clapham]