A2-Arroyo La Laguna, lower portion of section, San Juan: Sinemurian - Pliensbachian, Argentina

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Peltaspermopsida - Peltaspermales - Umkomasiaceae
Pachypteris sanjuanina
Equisetopsida - Araucariaceae
Brachyphyllum menendezi
Bennettitales
Otozamites volkheimeri
Polypodiopsida
Cladophlebis cf. kurtzi Frenguelli 1947
Polypodiopsida - Equisetales - Equisetaceae
Equisetites sp. Sternberg 1833
see common names

Geography
Country:Argentina State/province:San Juan
Coordinates: 32.3° South, 70.0° West (view map)
Paleocoordinates:34.0° South, 30.6° West
Basis of coordinate:stated in text
Geographic resolution:small collection
Time
Period:Jurassic Epoch:Early/Lower Jurassic
Key time interval:Sinemurian - Pliensbachian
Age range of interval:199.50000 - 184.20000 m.y. ago
Stratigraphy
Formation:El Freno
Local section:Arroyo La Laguna
Stratigraphic resolution:bed
Stratigraphy comments: taxa from several beds within a 66 m thick section
Lithology and environment
Primary lithology: conglomerate
Secondary lithology: sandstone
Lithology description: conglomerates, sandstones, and 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:33693
Authorizer:A. Miller Enterer:K. Layou
Modifier:A. Khan Research group:marine invertebrate
Created:2003-08-05 13:03:57 Last modified:2013-08-15 21:14:50
Access level:the public Released:2003-08-05 13:03:57
Creative Commons license:CC BY
Reference information

Primary reference:
3975. S. E. Damborenea. 1987. Early Jurassic Bivalvia of Argentina: Part 1, Stratigraphical introduction and superfamilies Nuculanacea, Arcacea, Mytilacea and Pinnacea. Palaeontographica A199(1-3):23-111 [W. Kiessling/W. Kiessling]