Reconnaissance of prehistoric rock-avalanches and rock blocks slides in the Andean area of Neuquén (37°15′-37°30′S)

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Five prehistoric rock-avalanches are described in the northern cordilleran region of Neuquén Province, between 37°15′ and 37°30′S and between 70°55′ and 71°05′W. These slides and their deposits were not previously identified and moreover they were classified as glacial and glaciofluvial in origin. A...

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Autores principales: Gonzalez Diaz, E.F., Folguera, A.
Formato: Artículo publishedVersion
Lenguaje:Inglés
Publicado: 2005
Materias:
Break-away zones
Geological hazards
Northern Neuquén
Rock-avalanches
Seismic trigger
cordillera
deposition
glaciofluvial deposit
prehistoric
rock avalanche
rock block
shock wave
sliding
structural geology
Argentina
Neuquen
South America
Lama guanicoe
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00044822_v60_n3_p446_GonzalezDiaz
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paperaa:paper_00044822_v60_n3_p446_GonzalezDiaz2023-06-12T16:40:08Z Reconnaissance of prehistoric rock-avalanches and rock blocks slides in the Andean area of Neuquén (37°15′-37°30′S) Rev. Asoc. Geol. Argent. 2005;60(3):446-460 Gonzalez Diaz, E.F. Folguera, A. Break-away zones Geological hazards Northern Neuquén Rock-avalanches Seismic trigger cordillera deposition glaciofluvial deposit prehistoric rock avalanche rock block shock wave sliding structural geology Argentina Neuquen South America Lama guanicoe Five prehistoric rock-avalanches are described in the northern cordilleran region of Neuquén Province, between 37°15′ and 37°30′S and between 70°55′ and 71°05′W. These slides and their deposits were not previously identified and moreover they were classified as glacial and glaciofluvial in origin. All of them are developed on volcanic-sedimentary deposits. They are named after local places: Cerro Piche Moncol, Cerro Guañaco, Cerro Coronal, Laguna Negra and Laguna Lauquen Mallin avalanches. The first three form a group of avalanches situated north of Reñileuvú creek, in the vicinity of the previously described Moncol rock-avalanche. Their break-away zones are located on the lateral slopes of a pre-existing deep glacial valley. The biggest rock-avalanche is the Cerro Piche Moncol and its deposits are due to the collapse of the southern flank of a volcanic edifice with a small caldera. The Cerro Guañaco, Cerro Coronal and Laguna Negra rock-avalanches began as a slump slide to evolving distally into a flow. The slides of Laguna Lauquen Mallín are big rock-block slides. Some local factors, principally contrasting lithology and physical properties, structural factors and more humid conditions during postglacial times favourable conditions for the loss of slope equilibrium. The authors suggest that these gravitational movements triggered by seismic shock. The age of these rock-avalanches is unknown but they must be younger than last local glaciation. © 2005 Asociación Geológica Argentina. Fil:Folguera, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2005 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion application/pdf eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00044822_v60_n3_p446_GonzalezDiaz
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language Inglés
orig_language_str_mv eng
topic Break-away zones
Geological hazards
Northern Neuquén
Rock-avalanches
Seismic trigger
cordillera
deposition
glaciofluvial deposit
prehistoric
rock avalanche
rock block
shock wave
sliding
structural geology
Argentina
Neuquen
South America
Lama guanicoe
spellingShingle Break-away zones
Geological hazards
Northern Neuquén
Rock-avalanches
Seismic trigger
cordillera
deposition
glaciofluvial deposit
prehistoric
rock avalanche
rock block
shock wave
sliding
structural geology
Argentina
Neuquen
South America
Lama guanicoe
Gonzalez Diaz, E.F.
Folguera, A.
Reconnaissance of prehistoric rock-avalanches and rock blocks slides in the Andean area of Neuquén (37°15′-37°30′S)
topic_facet Break-away zones
Geological hazards
Northern Neuquén
Rock-avalanches
Seismic trigger
cordillera
deposition
glaciofluvial deposit
prehistoric
rock avalanche
rock block
shock wave
sliding
structural geology
Argentina
Neuquen
South America
Lama guanicoe
description Five prehistoric rock-avalanches are described in the northern cordilleran region of Neuquén Province, between 37°15′ and 37°30′S and between 70°55′ and 71°05′W. These slides and their deposits were not previously identified and moreover they were classified as glacial and glaciofluvial in origin. All of them are developed on volcanic-sedimentary deposits. They are named after local places: Cerro Piche Moncol, Cerro Guañaco, Cerro Coronal, Laguna Negra and Laguna Lauquen Mallin avalanches. The first three form a group of avalanches situated north of Reñileuvú creek, in the vicinity of the previously described Moncol rock-avalanche. Their break-away zones are located on the lateral slopes of a pre-existing deep glacial valley. The biggest rock-avalanche is the Cerro Piche Moncol and its deposits are due to the collapse of the southern flank of a volcanic edifice with a small caldera. The Cerro Guañaco, Cerro Coronal and Laguna Negra rock-avalanches began as a slump slide to evolving distally into a flow. The slides of Laguna Lauquen Mallín are big rock-block slides. Some local factors, principally contrasting lithology and physical properties, structural factors and more humid conditions during postglacial times favourable conditions for the loss of slope equilibrium. The authors suggest that these gravitational movements triggered by seismic shock. The age of these rock-avalanches is unknown but they must be younger than last local glaciation. © 2005 Asociación Geológica Argentina.
format Artículo
Artículo
publishedVersion
author Gonzalez Diaz, E.F.
Folguera, A.
author_facet Gonzalez Diaz, E.F.
Folguera, A.
author_sort Gonzalez Diaz, E.F.
title Reconnaissance of prehistoric rock-avalanches and rock blocks slides in the Andean area of Neuquén (37°15′-37°30′S)
title_short Reconnaissance of prehistoric rock-avalanches and rock blocks slides in the Andean area of Neuquén (37°15′-37°30′S)
title_full Reconnaissance of prehistoric rock-avalanches and rock blocks slides in the Andean area of Neuquén (37°15′-37°30′S)
title_fullStr Reconnaissance of prehistoric rock-avalanches and rock blocks slides in the Andean area of Neuquén (37°15′-37°30′S)
title_full_unstemmed Reconnaissance of prehistoric rock-avalanches and rock blocks slides in the Andean area of Neuquén (37°15′-37°30′S)
title_sort reconnaissance of prehistoric rock-avalanches and rock blocks slides in the andean area of neuquén (37°15′-37°30′s)
publishDate 2005
url http://hdl.handle.net/20.500.12110/paper_00044822_v60_n3_p446_GonzalezDiaz
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AT folgueraa reconnaissanceofprehistoricrockavalanchesandrockblocksslidesintheandeanareaofneuquen37153730s
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