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

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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: Gonzalez Diaz, E.F., Fauque, L., Costa, G., Giaccardp, A., De Palomera, P.A., Pereyra, F.
Formato: Artículo publishedVersion
Publicado: 1997
Materias:
avalanche
rockfall
seismicity
Argentina
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00044822_v52_n1_p93_GonzalezDiaz
http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00044822_v52_n1_p93_GonzalezDiaz_oai
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id I28-R145-paper_00044822_v52_n1_p93_GonzalezDiaz_oai
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spelling I28-R145-paper_00044822_v52_n1_p93_GonzalezDiaz_oai2020-10-19 Gonzalez Diaz, E.F. Fauque, L. Costa, G. Giaccardp, A. De Palomera, P.A. Pereyra, F. 1997 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. application/pdf http://hdl.handle.net/20.500.12110/paper_00044822_v52_n1_p93_GonzalezDiaz info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar Rev. Asoc. Geol. Argent. 1997;52(1):93-107 avalanche rockfall seismicity Argentina Rock avalanche of Potrero de Levés" southern Sierras Pampeanas, Sierra Grande of San Luis, Argentina (32° 30'S lot.) info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00044822_v52_n1_p93_GonzalezDiaz_oai
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-145
collection Repositorio Digital de la Universidad de Buenos Aires (UBA)
topic avalanche
rockfall
seismicity
Argentina
spellingShingle avalanche
rockfall
seismicity
Argentina
Gonzalez Diaz, E.F.
Fauque, L.
Costa, G.
Giaccardp, A.
De Palomera, P.A.
Pereyra, F.
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.
format Artículo
Artículo
publishedVersion
author Gonzalez Diaz, E.F.
Fauque, L.
Costa, G.
Giaccardp, A.
De Palomera, P.A.
Pereyra, F.
author_facet Gonzalez Diaz, E.F.
Fauque, L.
Costa, G.
Giaccardp, A.
De Palomera, P.A.
Pereyra, F.
author_sort Gonzalez Diaz, E.F.
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 http://hdl.handle.net/20.500.12110/paper_00044822_v52_n1_p93_GonzalezDiaz
http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00044822_v52_n1_p93_GonzalezDiaz_oai
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