Results 21 to 30 of about 111 (103)

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

TAXON, 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, Tim Böhnert, Nataly O'Leary, Maximilian Weigend   +3 more
wiley   +1 more source

La faja cataclástica del borde oriental del Sistema de FamatIna, ArgentIna

Estudios Geologicos, 1992
En las Sierras Pampeanas Noroccidentales del noroeste argentino se desarrolla una faja cataclástica de rumbo submeridional, en rocas del basamento ígneo-metamórfico pertenecientes al Paleozoico Inferior.
J. P. López, H. Lisiak, D. A. Indri
doaj   +1 more source

Lower–Middle Ordovician brachiopods from the Eastern Cordillera of Peru: evidence of active faunal dispersal across Rheic and Iapetus oceans

Papers in Palaeontology, Volume 10, Issue 5, September/October 2024.
Abstract New Floian and early middle Darriwilian brachiopod assemblages of the San José Formation of the Eastern Cordillera of Peru are presented. A new genus and species, Apurimella santiagoi, and two new species, Phragmorthis henrylunae and Nocturnellia ashaninka, are described.
Jorge Colmenar, César Augusto Chacaltana, Juan Carlos Gutiérrez‐Marco   +2 more
wiley   +1 more source

Implications of Flat‐Slab Subduction on Hydration, Slab Seismicity, and Arc Volcanism in the Pampean Region of Chile and Argentina

Geochemistry, Geophysics, Geosystems, Volume 25, Issue 3, March 2024.
Abstract The Pampean flat slab in central Chile and Argentina is characterized by the inland migration and subsequent cessation of arc volcanism since the mid‐Miocene. Slab flattening also affects the distribution and number of intermediate‐depth earthquakes and the evolution of the overlying continental thermal structure.
Xiaowen Liu, Lara S. Wagner, Claire A. Currie, Mark J. Caddick   +3 more
wiley   +1 more source

Petrología, Geoquímica y Geología estructural de la Sierra de Copacabana (provincia de Catamarca, República Argentina) y su significado geotectónico en el contexto del margen occidental del Gondwana

Estudios Geologicos, 1998
La Sierra de Copacabana es una unidad orográfica emplazada en el ambiente de Sierras Pampeanas Noroccidentales, al E del Sistema de Famatina. Tanto su basamento, compuesto por rocas metamórficas de grado medio formadas durante el ciclo Pampeano, como los
J. P. López
doaj   +1 more source

MÁS DE 1000 AÑOS DE EXPLOTACIÓN MINERA EN LA SIERRA DE FAMATINA. LA RIOJA, ARGENTINA [PDF]

Revista de Arqueología Histórica Argentina y Latinoamericana, 2012
This paper presents the results of the analytical techniques applied to a group of metal objects from archaeological sites in northern Sanagasta Aguada and La Rioja, corresponding to the Middle Period (ca.
Callegari, Adriana, Jacob, Cristian
doaj  

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

InMediaciones 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

New SHRIMP U-Pb data from the Famatina Complex: constraining Early–Mid Ordovician Famatinian magmatism in the Sierras Pampeanas, Argentina

Geologica Acta, 2009
New SHRIMP U-Pb zircon ages are reported for igneous and sedimentary rocks of the Famatina Complex, constraining the age of the magmatism and the ensialic basins.
J.A. DAHLQUIST, R.J. PANKHURST, C.W. RAPELA, C. GALINDO, P. ALASINO, C.M. FANNING, J. SAAVEDRA, E.G. BALDO   +7 more
doaj  

La agenda de La Rioja en el Congreso de 1824-1827

Prohistoria
Se analiza la posición de La Rioja en el Congreso de Buenos Aires de 1824 teniendo en cuenta su situación inicial como provincia subalterna hasta 1820.
Valentina Ayrolo
doaj   +1 more source

The parautochthonous Gondwanan origin of the Cuyania (greater Precordillera) terrane of Argentina: A re-evaluation of evidence used to support an allachthonous Laurentian origin

Geologica Acta, 2007
A substantial, diverse body of evidence has been interpreted as suggesting that the Cuyania terrane of northwestern Argentina, which includes the Argentine Precordillera, rifted from the Ouachita embayment of Laurentia in the Early Cambrian, drifted ...
S. Finney
doaj   +1 more source