Results 21 to 30 of about 739,498 (287)
Arsenic-bearing phases in South Andean volcanic ashes: Implications for As mobility in aquatic environments [PDF]
, 2015 Three samples of volcanic ashes collected after eruptions of the volcanos Hudson in 1991, Chaitén in 2008 and Puyehue in 2011 were analyzed in order to define the solid speciation of arsenic and the dynamics of its release to the aqueous phase.
Bia, Gonzalo Luis +3 more
core +1 more source
Invariant TE and TM magnetotelluric impedances: application to the BC87 dataset
Earth, Planets and Space, 2018 Invariants under rotation of the magnetotelluric impedance tensor relax the directional requirements when fitting data using two-dimensional (2D) models.
Enrique Gómez-Treviño +3 more
doaj +1 more source
Reverse magnetic anomaly controlled by Permian Igneous rocks in the Iberian Chain (N Spain) [PDF]
, 2014 Two important reverse dipolar magnetic anomalies in the Iberian Chain (Spain) are located over Permian igneous rocks. A detailed study of one of them, the Loscos magnetic anomaly, where the geological structure is well constrained, reveals that the ...
Calvín,P. Universidad de Zaragoza. Departamento. de Ciencias de la Tierra +3 more
core +4 more sources
Enseñanza y Comunicación de las GeocienciasSe realizó un estudio de caso múltiple con cuatro docentes de secundaria que trabajan en instituciones educativas públicas de Colombia, con el fin de analizar cómo los profesores de diferentes asignaturas enseñan los temas de Ciencias de la Tierra (CT ...
Rosa Carolina Ayala-Calvo +1 more
openalex +3 more sources
Herramientas de gamificación para el aprendizaje de ciencias de la tierra
Edutec. Revista Electrónica de Tecnología Educativa, 2018 El porcentaje de abandono escolar en Espana es superior al de otros paises de la Union Europea, lo que hace necesario fomentar el rendimiento del alumnado y su motivacion.
Isabel Soto García
semanticscholar +2 more sources
Estudios Geologicos, 2000 Las doleritas mesozoicas del sector surpirenaico de El Grado (Huesca) conservan estructuras de emplazamiento (con desarrollo del movimiento de lava fluida al techo y de carga en su base) desarrolladas al instruir en los sedimentos margo-evaporíticos en ...
M. Lago San José +5 more
doaj +1 more source
Early Cambrian U-Pb zircon age and Hf-isotope data from the Guasayán pluton, Sierras Pampeanas, Argentina: implications for the northwestern boundary of the Pampean arc [PDF]
, 2016 An Early Cambrian pluton, known as the Guasayán pluton, has been identified in the central area of Sierra de Guasayán, northwestern Argentina. A U?Pb zircon Concordia age of 533 ± 4 Ma was obtained by LA-MC-ICP-MS and represents the first report of ...
Alasino, Pablo Horacio +8 more
core +2 more sources
Estudios Geologicos, 2000 Un magmatismo alcalino, emplazado en sedimentos triásicos en facies Keuper, está bien representado en los sills doleríticos del área de Valacloche-Camarena (SE de la Cordillera Ibérica).
M. Lago San José +5 more
doaj +1 more source
Geofísica Internacional, 2005 En este trabajo se ha definido la estructura de velocidades de ondas S (VS) y P (Vp), así como el promedio de velocidades ( v s30 ) para los primeros 30 metros del subsuelo, a partir de perfiles sísmicos de refracción en el área de Linares, Nuevo León ...
J. C. Montalvo-Arrieta +5 more
doaj +1 more source
Hypercarnivorous apex predator could provide ecosystem services by dispersing seeds [PDF]
, 2016 Large ?hypercarnivorous? felids are recognized for their role as apex predators and hence as key elements in food webs and ecosystem functioning through competition and depredation.
Costan, Andrea Silvina +3 more
core +1 more source