Abstract:
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.
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Documento: |
Artículo
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Título: | Las Cañas rock-avalanche: Another manifestation of these phenomena on the western slope of the Sierra Grande de San Luis |
Autor: | González Díaz, E.F.; Eauqué, L.; Costa, C.H.; Giaccardi, A.D. |
Filiación: | Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón II, 1428 Buenos Aires, Argentina Departamento de Geología y Minería, Facultad de Ciencias Físico-Matemáticas y Naturales, Universidad Nacional de San Luis, Chacabuco 917, 5700 San Luis, Argentina
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Palabras clave: | avalanche; coseismic process; rockfall; seismic hazard; structural geology; Argentina |
Año: | 1998
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Volumen: | 53
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Número: | 3
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Página de inicio: | 325
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Página de fin: | 336
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Título revista: | Revista de la Asociacion Geologica Argentina
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Título revista abreviado: | Rev. Asoc. Geol. Argent.
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ISSN: | 00044822
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PDF: | https://bibliotecadigital.exactas.uba.ar/download/paper/paper_00044822_v53_n3_p325_GonzalezDiaz.pdf |
Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v53_n3_p325_GonzalezDiaz |
Referencias:
- Brogioni, H., Parrini, P., Pecchioni, E., Magmatismo pro y post colisional en el Cordón de El Realito, Sierra de San Luis, Argentina (1994) Actas 7° Congreso Geológico Chileno, 2, pp. 962-966. , Conceptión
- Castano, J.C., Bastías, H.E., (1981) Análisis Sismotectónico y su Aplicación a la Estimation del Peligro Sísmico, 7, pp. 1-42. , INPRES, Publication Técnica San Juan
- Coates, R.R., Landslides (1977) Geological Society of America Bulletin, Reviews in Engineering Geology, 3, p. 273. , Boulder, Colorado
- Costa, C.H., (1992) Neotectónica del sur de la Sierra de San Luis, p. 390. , Tesis Doctoral Universidad Nacional de San Luis, Inédito
- Criado Roque, P., Mombrú, C., Ramos, V., Estructura e Interpretación Tectónica (1981) Geología de la Provincia de San Luis. Relatorio Del 8° Congreso Geológico Argentino, pp. 155-192. , Yrigoyen, M. (Ed.): Buenos Aires
- Fauqué, L., Avalanchas de rocas de la Quebrada de Segovia y zonas vecinas de la vertiente occidental de las Sierras de Famatina, Provincia de La Rioja (1987) Actas 10° Congreso Geológico Argentine, 3, pp. 333-336. , Buenos Aires
- Fauqué, L., Strecker, M., Large rock avalanches deposits (Sturztröme, Sturztröms) at Sierra Anconquija, Northern Sierras Pampeanas, Argentina (1988) Eclogae Geologica Helvetica, 81 (3), pp. 579-592. , Basel
- González, R.R.L., Descriptión Geológica de la Hoja 22g, Quines (Provincia de San Luis) (1957) Dirección Nacional do Minería, Boletín, 87, p. 51. , Buenos Aires
- Gonzalez Díaz, E.F., Geomorfología (1981) Relatorio del 8° Congreso Geológico Argentine, pp. 193-236. , Yrigoyen, M. (Ed.): Geología y Recursos Naturales de la Provincia de San Luis. Buenos Aires
- Gonzalez Díaz, E.F., Fauqué, L., Costa, C., Giaccardi, A., De Palomera, R.P., Pereyra, F., La Avalancha de Rocas del Potrero de Leyes, Sierras Pampeanas Australes, Sierra Grande de San Luis, Argentina (32° 30') (1997) Revista de la Asociación Geológica Argentina, 52 (1), pp. 339-354
- Keefer, D.K., Rock-avalanches caused by earthquakes: Source characteristics (1984) Science, 223, pp. 1288-1290
- Keefer, D.K., Landslides caused by earthquakes (1984) Geological Society of America Bulletin, 95, pp. 406-421
- Killmurray, J.O., Dalla Salda, L., Caracteres estructurales y petrológicos de la region central y sur de la Sierra de San Luis (1977) Revista del Centenario del Museo de La Plata, 4, pp. 167-178. , La Plata
- Naranjo, J.A., Francis, P., High velocity debris avalanche at Lastarria Volcano in the North Chilean Andes (1987) Bulletin of Volcanology, 49, pp. 509-514
- Pastore, F., González, R.R.L., (1954) Descriptión Geológica de la Hoja 23g, San Francisco (San Luis), 80, p. 62. , Dirección Nacional de Mineria, Boletín Buenos Aires
- Rocca, R., Decanini, L., Prato, C., Riesgos sísmicos en el valle longitudinal de las Sierras de Córdoba (1991) Actas Asociación Argentina de Geología Aplicada a la Ingeniería, 6, pp. 136-153. , Buenos Aires
Citas:
---------- APA ----------
González Díaz, E.F., Eauqué, L., Costa, C.H. & Giaccardi, A.D.
(1998)
. Las Cañas rock-avalanche: Another manifestation of these phenomena on the western slope of the Sierra Grande de San Luis . Revista de la Asociacion Geologica Argentina, 53(3), 325-336.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v53_n3_p325_GonzalezDiaz [ ]
---------- CHICAGO ----------
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 "
. Revista de la Asociacion Geologica Argentina 53, no. 3
(1998) : 325-336.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v53_n3_p325_GonzalezDiaz [ ]
---------- MLA ----------
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 "
. Revista de la Asociacion Geologica Argentina, vol. 53, no. 3, 1998, pp. 325-336.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v53_n3_p325_GonzalezDiaz [ ]
---------- VANCOUVER ----------
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 . Rev. Asoc. Geol. Argent. 1998;53(3):325-336.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v53_n3_p325_GonzalezDiaz [ ]