Mina San Eduardo 1: Valanginian, Argentina

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Cephalopoda - Ammonitida - Olcostephanidae
Olcostephanus (Viluceras) duraznoensis Aguirre-Urreta and Rawson 1999
Bivalvia - Trigoniida - Myophorellidae
Steinmanella sp. Crickmay 1930
Bivalvia - Pectinida - Entoliidae
Entolium sp. (Meek 1865)
see common names

Geography
Country:Argentina
Coordinates: 39.5° South, 67.7° West (view map)
Paleocoordinates:38.5° South, 30.9° 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 - 132.60000 m.y. ago
Stratigraphy
Formation:Agrio Local bed:1
Local order:bottom to top
Stratigraphic resolution:bed
Stratigraphy comments: 1.3m thick bed, at base of sequence
Lithology and environment
Primary lithology: silty "shale"
Secondary lithology:gray sandy "limestone"
Includes fossils?Y
Lithology description: grey sandy limestone in dark, silty shales
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:37752
Authorizer:J. Alroy Enterer:E. Leckey
Modifier:E. Leckey Research group:marine invertebrate
Created:2004-03-23 08:59:35 Last modified:2004-03-23 10:59:35
Access level:the public Released:2004-03-23 08:59:35
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]