Bajo de La Comisión: Late/Upper Albian, Argentina

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Trileites cf. murrayi Marcinkiewicz 1971
Pteridopsida - Marsileales
Arcellites pentagonalis n. sp. Villar de Seoane and Archangelsky 2008
Arcellites santacrucensis Baldoni 1987
unclassified
Striatriletes areolatus n. sp. Villar de Seoane and Archangelsky 2008
Erlansonisporites verrucatus n. sp. Villar de Seoane and Archangelsky 2008
Equisetopsida - Araucariaceae
Balmeisporites holodictyus Cookson and Dettmann 1958
Lycopodiopsida - Isoetales
Minerisporites aequatus n. sp. Villar de Seoane and Archangelsky 2008
Minerisporites laceratus Archangelsky and Villar de Seoane 1990
unclassified
Tenellisporites coronatus Baldoni and Batten 1991
Paxillitriletes menendezii Baldoni and Taylor 1985
Paxillitriletes kachaikense Baldoni 1987
see common names

Geography
Country:Argentina State/province:Santa Cruz
Coordinates: 48.9° South, 72.0° West (view map)
Paleocoordinates:55.8° South, 47.1° West
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period:Cretaceous Epoch:Early/Lower Cretaceous
Stage:Albian 10 m.y. bin:Cretaceous 4
Key time interval:Late/Upper Albian
Age range of interval:106.20000 - 100.50000 m.y. ago
Stratigraphy
Formation:Kachaike
Lithology and environment
Primary lithology: lithified sandy sandstone
Secondary lithology: lithified "shale"
Includes fossils?Y
Lithology description: Is composed of a succession of psamitas and interleaved shales, of deltaic environment, which is towards the top continentalizan.
Environment:delta plain
Geology comments: The lower section contains transgressive clastic sediments of deltaic origin and marine influence, and is followed transitionally by continental deposits. name. One sample reflecting a fluvial shelf environment and four samples from deltaic shelf deposits in the middle part of the stratigraphic section.
Taphonomy
Modes of preservation:soft parts,original sporopollenin
Size of fossils:microfossils
Collection methods and comments
Collection methods:surface (in situ)
Reason for describing collection:taxonomic analysis
Collection method comments: The specimens are stored in the Paleobotanical Collection of the museum under catalogue numbers prefixed by BA Pb MEB.
Metadata
Database number:150201
Authorizer:C. Jaramillo Enterer:J. Moreno
Modifier:J. Moreno Research group:paleobotany
Created:2013-09-04 01:13:40 Last modified:2013-09-03 10:17:13
Access level:authorizer only Released:2016-09-04 01:13:40
Creative Commons license:CC BY
Reference information

Primary reference:
48061. L. Villar de Seoane and S. Archangelsky. 2008. Taxonomy and biostratigraphy of Cretaceous megaspores from Patagonia, Argentina. Cretaceous Research 29:354-372 [C. Jaramillo/J. Moreno]