Las Cañas rock-avalanche: Another manifestation of these phenomena on the western slope of the Sierra Grande de San Luis

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A rock-avalanche (named Las Cañas) was distinguished near the Potrero de Leyes rock-avalanche previously recognized in the southern Sierras Pampeanas. It is located on the western slope of the Sierra Grande de San Luis (San Luis Province), which is regarded as the range uplift front during the Andea...

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Autores principales: González Díaz, E.F., Eauqué, L., Costa, C.H., Giaccardi, A.D.
Formato: Artículo publishedVersion
Publicado: 1998
Materias:
avalanche
coseismic process
rockfall
seismic hazard
structural geology
Argentina
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00044822_v53_n3_p325_GonzalezDiaz
https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00044822_v53_n3_p325_GonzalezDiaz_oai
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Repositorio Digital de la Universidad de Buenos Aires (UBA) de Universidad de Buenos Aires
id I28-R145-paper_00044822_v53_n3_p325_GonzalezDiaz_oai
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spelling I28-R145-paper_00044822_v53_n3_p325_GonzalezDiaz_oai2024-08-16 González Díaz, E.F. Eauqué, L. Costa, C.H. Giaccardi, A.D. 1998 A rock-avalanche (named Las Cañas) was distinguished near the Potrero de Leyes rock-avalanche previously recognized in the southern Sierras Pampeanas. It is located on the western slope of the Sierra Grande de San Luis (San Luis Province), which is regarded as the range uplift front during the Andean tectonism. On account of its greater degradation than the Potrero de Leyes rock-avalanche, the deposits described here are considered to be older in age. Their morphometric attributes could be only roughly calculated, because fluvial erosion has removed a large portion of its initial shape and volume. The avalanche-related deposits form round-shaped hills, which can be distinguished from alluvial fan deposits by their higher altitude, photogeological signature and degree of degradation. Two fault sets have also modified its original surface configuration. It is considered that this phenomenon was also triggered by an earthquake. Hence, the recognition and analysis of these geomorphological processes provides a useful addition to palaeosismological analysis and is significant for an adequate evaluation of the the seismic hazard of this region. © 1998 Asociación Geológica Argentina. application/pdf http://hdl.handle.net/20.500.12110/paper_00044822_v53_n3_p325_GonzalezDiaz info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar Rev. Asoc. Geol. Argent. 1998;53(3):325-336 avalanche coseismic process rockfall seismic hazard structural geology Argentina Las Cañas rock-avalanche: Another manifestation of these phenomena on the western slope of the Sierra Grande de San Luis info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00044822_v53_n3_p325_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
coseismic process
rockfall
seismic hazard
structural geology
Argentina
spellingShingle avalanche
coseismic process
rockfall
seismic hazard
structural geology
Argentina
González Díaz, E.F.
Eauqué, L.
Costa, C.H.
Giaccardi, A.D.
Las Cañas rock-avalanche: Another manifestation of these phenomena on the western slope of the Sierra Grande de San Luis
topic_facet avalanche
coseismic process
rockfall
seismic hazard
structural geology
Argentina
description A rock-avalanche (named Las Cañas) was distinguished near the Potrero de Leyes rock-avalanche previously recognized in the southern Sierras Pampeanas. It is located on the western slope of the Sierra Grande de San Luis (San Luis Province), which is regarded as the range uplift front during the Andean tectonism. On account of its greater degradation than the Potrero de Leyes rock-avalanche, the deposits described here are considered to be older in age. Their morphometric attributes could be only roughly calculated, because fluvial erosion has removed a large portion of its initial shape and volume. The avalanche-related deposits form round-shaped hills, which can be distinguished from alluvial fan deposits by their higher altitude, photogeological signature and degree of degradation. Two fault sets have also modified its original surface configuration. It is considered that this phenomenon was also triggered by an earthquake. Hence, the recognition and analysis of these geomorphological processes provides a useful addition to palaeosismological analysis and is significant for an adequate evaluation of the the seismic hazard of this region. © 1998 Asociación Geológica Argentina.
format Artículo
Artículo
publishedVersion
author González Díaz, E.F.
Eauqué, L.
Costa, C.H.
Giaccardi, A.D.
author_facet González Díaz, E.F.
Eauqué, L.
Costa, C.H.
Giaccardi, A.D.
author_sort González Díaz, E.F.
title Las Cañas rock-avalanche: Another manifestation of these phenomena on the western slope of the Sierra Grande de San Luis
title_short Las Cañas rock-avalanche: Another manifestation of these phenomena on the western slope of the Sierra Grande de San Luis
title_full Las Cañas rock-avalanche: Another manifestation of these phenomena on the western slope of the Sierra Grande de San Luis
title_fullStr Las Cañas rock-avalanche: Another manifestation of these phenomena on the western slope of the Sierra Grande de San Luis
title_full_unstemmed Las Cañas rock-avalanche: Another manifestation of these phenomena on the western slope of the Sierra Grande de San Luis
title_sort las cañas rock-avalanche: another manifestation of these phenomena on the western slope of the sierra grande de san luis
publishDate 1998
url http://hdl.handle.net/20.500.12110/paper_00044822_v53_n3_p325_GonzalezDiaz
https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00044822_v53_n3_p325_GonzalezDiaz_oai
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