Rock avalanche of Potrero de Levés" southern Sierras Pampeanas, Sierra Grande of San Luis, Argentina (32° 30'S lot.)

The first rock avalanche to be identified in the southern Sierras Pampeanas is described here and its origin analysed. It is located in the northern sector (Cordon El Realito) of the San Luis fault scarp, which marks the western slope of the Sierra Grande de San Luis. It is suggested that the avalan...

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Autores principales: Fauque, Luis E., Costa, Gabriel A., Pereyra, Fernando X.
Publicado: 1997
Materias:
avalanche
rockfall
seismicity
Argentina
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v52_n1_p93_GonzalezDiaz
http://hdl.handle.net/20.500.12110/paper_00044822_v52_n1_p93_GonzalezDiaz
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00044822_v52_n1_p93_GonzalezDiaz
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spelling paper:paper_00044822_v52_n1_p93_GonzalezDiaz2023-06-08T14:25:16Z Rock avalanche of Potrero de Levés" southern Sierras Pampeanas, Sierra Grande of San Luis, Argentina (32° 30'S lot.) Fauque, Luis E. Costa, Gabriel A. Pereyra, Fernando X. avalanche rockfall seismicity Argentina The first rock avalanche to be identified in the southern Sierras Pampeanas is described here and its origin analysed. It is located in the northern sector (Cordon El Realito) of the San Luis fault scarp, which marks the western slope of the Sierra Grande de San Luis. It is suggested that the avalanche was triggered by seismic schock, a hypothesis supported by the seismotectonic and geologic conditions of the region as well as by the records of historical seismicity and by the recognition of modern fractures, scarplets and springwater spots in the piedmont area. Several other geological factors also support this suggestion, such as joint density, main shear zone location, attitude of the internal structure of granitoids and other nearby gravitational movements. The primary landforms of the avalanche landscape strongly suggest that the event was a recent one. The estimated speed is about 190 km/hour. © 1997 Asociacón Geológica Argentina. Fil:Fauque, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Costa, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Pereyra, F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1997 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v52_n1_p93_GonzalezDiaz http://hdl.handle.net/20.500.12110/paper_00044822_v52_n1_p93_GonzalezDiaz
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic avalanche
rockfall
seismicity
Argentina
spellingShingle avalanche
rockfall
seismicity
Argentina
Fauque, Luis E.
Costa, Gabriel A.
Pereyra, Fernando X.
Rock avalanche of Potrero de Levés" southern Sierras Pampeanas, Sierra Grande of San Luis, Argentina (32° 30'S lot.)
topic_facet avalanche
rockfall
seismicity
Argentina
description The first rock avalanche to be identified in the southern Sierras Pampeanas is described here and its origin analysed. It is located in the northern sector (Cordon El Realito) of the San Luis fault scarp, which marks the western slope of the Sierra Grande de San Luis. It is suggested that the avalanche was triggered by seismic schock, a hypothesis supported by the seismotectonic and geologic conditions of the region as well as by the records of historical seismicity and by the recognition of modern fractures, scarplets and springwater spots in the piedmont area. Several other geological factors also support this suggestion, such as joint density, main shear zone location, attitude of the internal structure of granitoids and other nearby gravitational movements. The primary landforms of the avalanche landscape strongly suggest that the event was a recent one. The estimated speed is about 190 km/hour. © 1997 Asociacón Geológica Argentina.
author Fauque, Luis E.
Costa, Gabriel A.
Pereyra, Fernando X.
author_facet Fauque, Luis E.
Costa, Gabriel A.
Pereyra, Fernando X.
author_sort Fauque, Luis E.
title Rock avalanche of Potrero de Levés" southern Sierras Pampeanas, Sierra Grande of San Luis, Argentina (32° 30'S lot.)
title_short Rock avalanche of Potrero de Levés" southern Sierras Pampeanas, Sierra Grande of San Luis, Argentina (32° 30'S lot.)
title_full Rock avalanche of Potrero de Levés" southern Sierras Pampeanas, Sierra Grande of San Luis, Argentina (32° 30'S lot.)
title_fullStr Rock avalanche of Potrero de Levés" southern Sierras Pampeanas, Sierra Grande of San Luis, Argentina (32° 30'S lot.)
title_full_unstemmed Rock avalanche of Potrero de Levés" southern Sierras Pampeanas, Sierra Grande of San Luis, Argentina (32° 30'S lot.)
title_sort rock avalanche of potrero de levés" southern sierras pampeanas, sierra grande of san luis, argentina (32° 30's lot.)
publishDate 1997
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v52_n1_p93_GonzalezDiaz
http://hdl.handle.net/20.500.12110/paper_00044822_v52_n1_p93_GonzalezDiaz
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AT costagabriela rockavalancheofpotrerodelevessouthernsierraspampeanassierragrandeofsanluisargentina3230slot
AT pereyrafernandox rockavalancheofpotrerodelevessouthernsierraspampeanassierragrandeofsanluisargentina3230slot
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