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Caracterización y análisis de la ceniza del volcán Popocatépetl
(Universidad Autónoma Metropolitana (México). Unidad Azcapotzalco. División de Ciencias Básicas e Ingeniería., 2017)
En el presente trabajo se lleva a cabo la caracterización de la ceniza volcánica recolectada en el municipio de Amecameca de Juárez en el estado de México, proveniente de la erupción explosiva del volcán Popocatépetl del ...
Regional variability of volcanic ash soils in south Ecuador: the relation with parent material, climate and land use
(2007)
The high Andes region of south Ecuador is characterised by intense land use changes. These changes affect particularly the páramo, which is a collection of high altitudinal grassland ecosystems. In this region, the interaction ...
Did ash fall from Puyehue-Cordón Caulle volcanic complex affect ant abundance and richness in the Patagonian steppe?¿Afectó la lluvia de cenizas del complejo volcánico Puyehue-Cordón Caulle la abundancia y riqueza de hormigas en la estepa patagónica?
(Asociación Argentina de Ecología, 2014-04)
Las perturbaciones naturales constituyen componentes fundamentales en la dinámica de los ecosistemas. Aquellas de gran escala, como las ocasionadas por huracanes y volcanes, han sido poco estudiadas debido a su baja ...
30 million years of Permian volcanism recorded in the Choiyoi igneous province (W Argentina) and their source for younger ash fall deposits in the Parana Basin: SHRIMP U-Pb zircon geochronology evidence
(ELSEVIER SCIENCE BV, 2011)
We present four SHRIMP U-Pb zircon ages for the Choiyoi igneous province from the San Rafael Block, central-western Argentina. Dated samples come from the Yacimiento Los Reyunos Formation (281.4 +/- 2.5 Ma) of the Cochico ...
Incluindo Funcionalidades no Modelo BRAMS para Simular o Transporte de Cinzas Vulcânicas: Descrição e Análise de Sensibilidade Aplicada ao Evento Eruptivo do Puyehue em 2011
(Sociedade Brasileira de Meteorologia, 2016)
This work has two main goals, the first is provide a description of how the atmospheric BRAMS model was structured in order to enable it to simulate the emission, dispersion and sedimentation of volcanic ash; the second ...
A modified resin exchange method for measurement of available phosphate in soils derived from volcanic ash
(The Williams & Wilkins Co., 1975)
An experimental method to determine available phosphate in soils using anion exchange resin as an extractant has been described (3, 5). However, when this method is applied to volcanic ash-derived soils, some problems ...
N-pool in volcanic ash-derived soils in Chile and its changes in deforested sites
(PERGAMON-ELSEVIER SCIENCE LTD, 2002-08)
Changes in N-distribution patterns in volcanic-ash of Chile after deforestation of a primary forest were measured. There is a clear tendency towards the depletion of N linked to high molecular weight fractions (humin, humic ...
Balance and distribution of sulphur in volcanic ash-derived soils in Chile
(PERGAMON-ELSEVIER SCIENCE LTD, 2002-09)
Sulphur distribution with an insight in S-organic fractions was studied in volcanic-ash derived soils of Chile (Typic Dystrandepts, Palehumult) by isolating each fraction and measuring S directly by instrumental elemental ...