Sección E - Valle del Cura: Middle Miocene, Argentina

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Ricciaesporites sp. Nagy 1968
Orapollis sp. Krutzsch 1966
Polyorificites sp.
Polypodiopsida
Biretisporites sp. Delcourt et al. 1963
Pteridopsida
Leiotriletes sp. Potonie and Kremp 1954
Deltoidospora sp. Miner 1935
Angiospermae - Poales - Poaceae
Graminidites sp. Potonie 1960
Angiospermae - Caryophyllales - Chenopodiaceae
Chenopodipollis chenopodiaceoides Truswell 1985
Angiospermae - Caryophyllales
Lymingtonia sp. Erdtman 1960
Angiospermae - Asterales - Goodeniaceae
Poluspissusites sp. Salard-Cheboldaeff 1978
Angiospermae - Asterales - Asteraceae
Tubulifloridites antipodica Cookson 1947
Angiospermae - Proteales - Proteaceae
Proteacidites sp. Cookson and Couper 1953
Angiospermae - Fabales - Fabaceae
Polyadopollenites sp. Pflug and Thomson 1953
Margocolporites vanwijhei Germeraad et al. 1968
Angiospermae - Fagales
Nothofagidites acromegacanthus Menendez and Caccavari 1975
Nothofagidites saraensis Menendez and Caccavari 1975
Angiospermae - Myrtales
Myrtaceidites sp. Cookson and Pike 1960
Magnoliopsida
Senipites patagonica Barreda 1997
Striatricolporites gamerroi Archangelsky 1973
Malvacipollis subtilis Stover 1973
Tetracolporites spectabilis Pocknall and Mildenhall 1984
Rhoipites sp. Wodehouse 1933
Rhoipites sp. 1, 2 and 3
Rhoipites cienaguensis Barreda 1997
Rhoipites baculatus Archangelsky 1973
Coniferales - Podocarpaceae
Podocarpidites sp. Cookson 1947
Podocarpidites elegans Romero 1977
Podocarpidites cf. ellipticus Cookson 1947
Ginkgoopsida - Ephedrales
Equisetosporites notensis Romero 1977
Equisetosporites claricristatus Barreda 1997
Equisetosporites lusaticus Barreda 1997
unclassified
Baumannipollis sp. Barreda 1993
Baumannipollis variaperturatus Barreda 1993
Malvacipolloides comodoroensis Barreda 1993
Cyperaceaepollis neogenicus Krutzsch 1970
Mutisiapollis viteauensis Barreda 1998
see common names

Geography
Country:Argentina State/province:San Juan County:Valle del Cura
Coordinates: 29.5° South, 69.5° West (view map)
Paleocoordinates:30.0° South, 65.8° West
Basis of coordinate:based on nearby landmark
Time
Period:Neogene Epoch:Miocene
10 m.y. bin:Cenozoic 5
Key time interval:Middle Miocene
Age range of interval:15.98000 - 11.63000 m.y. ago
Stratigraphy
Formation:La Ollita
Local section:E Local bed:E
Local order:bottom to top
Stratigraphy comments: Under review is the definition stratigraphic of the La Ollita Formation. This name "La Ollita" has been used with different meanings, it is convenient to use the term informal "Serie del Yeso".
Lithology and environment
Primary lithology: lithified "shale"
Secondary lithology: lithified gypsum
Includes fossils?Y
Includes fossils?Y
Lithology description: The lower section (A in the profile) of about 18m, is in tectonic contact with multicolored tuff and is made up off tuffs, tuffaceous sandstones, "coladas traquiandesiticas", volcanic breccias and conglomerates. Above 95 meters are arranged ortoconglomerates clast and matrix-supported, with lithic sandstones (section B). The middle section (section C) reaches about 115 meters and is composed of shale, lithic sandstones, gypsum levels intraformational conglomerates. Section D (45m) contains greater presence of gypsum, with some shale, marl and limestone. The upper section E of 35 meters, is characterized by alternating of shale and gypsum layers, in this last section comes palynological association described in this study.
Environment:lacustrine indet.
Geology comments: Sedimentological characteristics of the upper section of the "Series of Plaster", indicate the development of lagoon systems subject to successive events expansion and contraction.
Taphonomy
Modes of preservation:soft parts,original sporopollenin
Size of fossils:microfossils
Collection methods and comments
Collection methods:hydrochloric,hydroflouric
Reason for describing collection:taxonomic analysis
Collection method comments: Microscopic preparations are deposited in the palinoteca of Centro de Investigaciones en Recursos Geológicos with the acronym CIRGEO Palin and catalog numbers 1125-1129.
Metadata
Database number:144061
Authorizer:C. Jaramillo Enterer:J. Ceballos
Modifier:J. Moreno Research group:paleobotany
Created:2013-04-30 02:49:27 Last modified:2013-10-07 14:47:58
Access level:authorizer only Released:2016-04-30 02:49:27
Creative Commons license:CC BY
Reference information

Primary reference:
46576. V. D. Barreda, P. R. Gutiérrez, and C. O. Limarino. 1998. Edad y paleoambiente de la "Serie del Yeso", Valle del Cura, provincia de San Juan: evidencias palinológicas. Ameghiniana 35(3):321-335 [C. Jaramillo/J. Ceballos/A. Cárdenas]