Results 61 to 70 of about 1,303 (189)

Sedimentation tempo in an Early Jurassic erg system: Refined chronostratigraphy and provenance of the Clarens Formation of southern Africa

Basin Research, Volume 36, Issue 3, May–June 2024.
Maximum depositional ages of the Early Jurassic Clarens Formation of southern Africa. Abstract The Clarens Formation is a widespread aeolianite deposited over southern Gondwana and represents the final phase of erg evolution in the main Karoo Basin during the Early Jurassic.
Howard V. Head, Emese M. Bordy, Robert Bolhar   +2 more
wiley   +1 more source

Caracterización petrológica y geoquímica de las rocas plutónicas de la Sierra de La Aguada, Provincia de San Luis, Argentina: Implicaciones genéticas con el arco magmático Famatiniano

Estudios Geologicos, 2017
El presente trabajo expone una síntesis de la geología que comprende al complejo cristalino que constituye la Sierra de La Aguada, provincia de San Luis, Argentina, desde un enfoque basado en las relaciones de campo, los rasgos petrológico-estructurales ...
E. Cristofolini, M. Barzola, J. Otamendi, A. Tibaldi, A. Morosini, P. Armas, G. Camilletti   +6 more
doaj   +1 more source

Análisis preliminar de ondas superficiales aplicado al modelado cortical en las Sierras Pampeanas, Argentina

, 2022
Se analizaron ondas superficiales de un sismógrafo WWSSNLP para obtener la velocidad de la corteza y manto superior en la región de las Sierras Pampeanas y de otras trayectorias diferentes que atraviesan Argentina.
Sabbione, Nora Cristina, Osella, Ana María, Rosa, María Laura   +2 more
core  

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

Late Holocene Dust Deposition Fluxes Over the Entire South Atlantic Ocean

Geochemistry, Geophysics, Geosystems, Volume 25, Issue 1, January 2024.
Abstract Mineral dust accumulated on the ocean floor is an important archive for reconstructing past atmospheric circulation changes and climatological conditions in the source areas. Dust emitted from Southern Hemisphere dust sources is widely deposited over the oceans. However, there are few records of dust deposition over the open ocean, and a large
Michèlle van der Does, Frank Lamy, Stephan Krätschmer, Jan‐Berend W. Stuut, Christoph Völker, Martin Werner, Roseanne Schwarz, Marty Fleisher, Gisela Winckler   +8 more
wiley   +1 more source

Identifying Laurentian and SW Gondwana sources in the Neoproterozoic to Early Paleozoic metasedimentary rocks of the Sierras Pampeanas: Paleogeographic and tectonic implications [PDF]

, 2015
The provenance of Neoproterozoic to Early Paleozoic sedimentary rocks in the Sierras Pampeanas has been established using U–Pb SHRIMP age determination of detrital zircons in twelve metasedimentary samples, with supplementary Hf and O isotope analyses of
Casquet Martín, César, Dahlquist, Juan A., Baldo, Edgardo G., Murra, Juan Alberto Félix, Pankhurst, Robert J., Murra, Juan A., Rapela, Carlos W., Casquet, Cesar, Rapela, Carlos Washington, Murra, J. A., Fanning, M., Rapela, Carlos W, Verdecchia, Sebastián Osvaldo, Verdecchia, Sebastian O., Fanning, C. Mark, Baldo, Edgardo Gaspar Agustín, Galindo Francisco, María Del Carmen, Pankhurst, Robert J, Galindo, Carmen, Dahlquist, J., Baldo, Edgardo, Dahlquist, Juan Andrés   +21 more
core   +1 more source

The El Gigante Metamorphic Complex: A missing block with a Grenville-age basement in the Western Sierras Pampeanas, Argentina

The southwestern paleo-margin of Gondwana is interpreted as an accretionary margin that was active from the late Neoproterozoic to the late Paleozoic. The basement of this paleo-margin is widely exposed in the central-western part of Argentina (Sierras ...
Lembo Wuest, C.I., Casquet Martín, César, Dahlquist, Juan A., Herazo, Lorena, Baldo, Edgardo G., Murra, Juan Alberto, Verdecchia, Sebastián, Ramacciotti, Carlos, Pankhurst, R.J., Zandomeni, Priscila S.   +9 more
core   +1 more source

Caracterización petrográfica y geoquímica del batolito Cerro Aspero-Alpa Corral (32°34'-32°42' LS y 64°43'-64°52' LO), provincia de Córdoba, Argentina

Estudios Geologicos, 1992
El batolito Cerro Aspero-Alpa Corral (CA-AC) es un cuerpo granítico que aflora en el extremo sur de las Sierras Pampeanas Orientales, en la provincia de Córdoba, República Argentina, cubriendo una superficie cercana a los 440 km2. Es un cuerpo intrusivo
G. Porta
doaj   +1 more source

Análisis preliminar de ondas superficiales aplicado al modelado cortical en las Sierras Pampeanas, Argentina [PDF]

, 2002
Se analizaron ondas superficiales de un sismógrafo WWSSNLP para obtener la velocidad de la corteza y manto superior en la región de las Sierras Pampeanas y de otras trayectorias diferentes que atraviesan Argentina.
Sabbione, Nora Cristina, Osella, Ana María, Rosa, María Laura   +2 more
core  

Macroinvertebrados de ríos serranos semiáridos de San Luis (Argentina): base para la evaluación ecológica

Acta Zoológica Lilloana
Los sistemas fluviales de regiones áridas y semiáridas están sometidos a estrés hídrico debido a la variabilidad de precipitaciones, eventos extremos y presión antrópica.
Cynthia Ortiz, Cesar Almeida, Daniel A. Dos Santos, Mariana B. Jofré   +3 more
doaj   +1 more source