Results 21 to 30 of about 1,962 (134)

Alluvial to lacustrine sedimentation in an endorheic basin during the Mio-Pliocene: The Toro Negro Formation, Central Andes of Argentina [PDF]

open access: yes, 2018
A 2400 m-thick sedimentary column belonging to the Toro Negro Formation was recorded along the Quebrada del Yeso, Sierra de Los Colorados (Vinchina Basin), La Rioja province, NW Argentina. The Vinchina basin is a good example of a closed basin surrounded
Amidon, William H.   +4 more
core   +1 more source

Esfera pública virtual. Una lectura política y comunicacional de lo público en la web

open access: yesInMediaciones de la Comunicación, 2018
Este trabajo indaga en el desarrollo teórico de la esfera pública virtual (EPV). Para responder a ello, el artículo se enfoca en la génesis de la esfera pública, las publicaciones en las redes sociales y la sutura biográfica, el doble estatuto de lo ...
Mariano Vázquez
doaj   +1 more source

Detrital-zircon geochronology and provenance of the Ocloyic synorogenic clastic wedge, and Ordovician accretion of the Argentine Precordillera terrane [PDF]

open access: yes, 2015
The Precordillera terrane in northwestern Argentina is interpreted to be anexotic (Laurentian) continental fragment that was accreted to western Gondwanaduring the Ordovician. One prominent manifestation of the subductionand collision process is a Middle?
Astini, Ricardo Alfredo   +3 more
core   +1 more source

Geochemical behavior of an acid drainage system: the case of the Amarillo River, Famatina (La Rioja, Argentina)

open access: yesEnvironmental Science and Pollution Research, 2016
The Amarillo River (Famatina range, Argentina, ~29° S and ~67° W) is unusual because acid mine drainage (AMD) is superimposed on the previously existing acid rock drainage (ARD) scenario, as a Holocene paleolake sedimentary sequence shows. In a markedly oxidizing environment, its water is currently ferrous and of the sulfate-magnesium type with high ...
Lecomte, Karina Leticia   +4 more
openaire   +3 more sources

Taxonomic studies of the genus Phymaturus (IGUANIA: LIOLAEMIDAE): Description of four new species. [PDF]

open access: yes, 2010
After the study of a diverse collection of Phymaturus from three Argentinian institutions and additional samples collected in the last two years we discovered several populations of uncertain taxonomic status.
Abdala, Cristian Simón   +2 more
core   +1 more source

Palynology of the la Veteada Formation (Lopingian) at Its Type Locality, Famatina Range, la Rioja Province, Argentina. Spores

open access: yesAmeghiniana, 2017
In this systematic study of palynological assemblages from the upper part of the type section of the La Veteada Formation, 38 species of trilete and monolete spores are described and/or illustrated. Two new species are instituted: Lundbladispora verrucosa and Secarisporites triangularis, and a new combination Secarisporites imperialis (Jansonius) is ...
Zavattieri, Ana Maria   +2 more
openaire   +2 more sources

La Horqueta Shear Zone, Sierra de Velasco, NW Argentina: petrography, geochemistry, structures and tectonic significance [PDF]

open access: yes, 2007
La Faja de Deformación La Horqueta (FDLH) es la sexta faja de cizalla reconocida en la sierra de Velasco, Sierras Pampeanas, NO de Argentina. Esta faja separa dos tipos de metagranitoides de características petrográficas y geoquímicas contrastadas ...
Grosse, Pablo   +2 more
core   +1 more source

Biogenic and physical sedimentary structures in latest Cambrian-earliest Ordovician mudrock facies (Famatina Range, Northwestern Argentina) [PDF]

open access: yes, 2003
Lamination is a common feature in shales and other mud-dominated rocks. When combined with other geological evidence, the diverse lamination types can provide important information about sedimentary processes and depositional environments.
Esteban, S.B.
core   +3 more sources

Enrichment in critical metals (In-Ge) and Te-Se in epithermal deposits of the 'La Carolina' district, San Luis, Argentina [PDF]

open access: yes, 2018
This study was supported by the ‘Proyecto de Ciencia y Técnica P-3-2-0414, of the National University of San Luis’ and by the Project CGL2016-76532-R from the MINECO of ...
Cepedal Hernández, María Antonia   +3 more
core   +2 more sources

Is it all Phacelia pinnatifida? Molecular delimitations and taxonomic revision of Phacelia sect. Glandulosae in South America based on ddRADseq

open access: yesTAXON, Volume 73, Issue 6, Page 1437-1459, December 2024.
Abstract Phacelia sect. Glandulosae, with ca. 62 taxa, is the most diverse of the 11 sections of the genus Phacelia (Hydrophyllaceae). The family is largely restricted to North and Central America, but the genus Phacelia has an amphitropical distribution with nine species reported from western South America, five of which have been assigned to P. sect.
Maria‐Anna Vasile   +3 more
wiley   +1 more source

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