The Barrancas rock-avalanche, of northern Neuquén Province (Argentina): Its relation to the outburst flood of December 29, 1914

At some unknown time in the past, instability of the slope of C° Pelán resulted in a rock-avalanche that blocked the Barrancas valley as a landslide dam and formed the Carrilauquen lagoon. It is suggested that the trigger was a seismic shock, that resulted in complex movement of a proximal planar sl...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: González Díaz, E.F., Giaccardi, A.D., Costa, C.H.
Formato: JOUR
Materias:
Breach
Carrilauquen
Landslide dam
Outburst flood
Rock-avalanche
Seism
dam
flood
landslide
outburst
rock avalanche
seismic source
trigger mechanism
Argentina
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00044822_v56_n4_p466_GonzalezDiaz
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00044822_v56_n4_p466_GonzalezDiaz
record_format dspace
spelling todo:paper_00044822_v56_n4_p466_GonzalezDiaz2023-10-03T13:57:39Z The Barrancas rock-avalanche, of northern Neuquén Province (Argentina): Its relation to the outburst flood of December 29, 1914 González Díaz, E.F. Giaccardi, A.D. Costa, C.H. Breach Carrilauquen Landslide dam Outburst flood Rock-avalanche Seism dam flood landslide outburst rock avalanche seismic source trigger mechanism Argentina At some unknown time in the past, instability of the slope of C° Pelán resulted in a rock-avalanche that blocked the Barrancas valley as a landslide dam and formed the Carrilauquen lagoon. It is suggested that the trigger was a seismic shock, that resulted in complex movement of a proximal planar slide and a distal flow, with a velocity estimated at about 270 km/h. After obstructing the valley the avalanche climbed up the opposite side for over 180 meters. The Carrilauquen lagoon was over 22 km long and 100 m deep. The exceptionally snowy winter of 1914, followed by a very warm spring-summer season, resulted in a great inflow of water into the lagoon that raised its level until it overtopped the natural dam and caused it to collapse when weakened by increased hydrostatic pressure. A huge outburst flood (jokulklaup; aluvión) flowed through the breach, and caused great devastation in the Barrancas and Colorado valleys for over 1,250 km as far as the Atlantic coast. Some rock-avalanche morphometric parameters are estimated and associated geomorphological features are described. Oral accounts by local residents and contemporaneous newspaper reports were the principal sources for describing the damage downstream of the Barrancas landslide dam. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00044822_v56_n4_p466_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 Breach
Carrilauquen
Landslide dam
Outburst flood
Rock-avalanche
Seism
dam
flood
landslide
outburst
rock avalanche
seismic source
trigger mechanism
Argentina
spellingShingle Breach
Carrilauquen
Landslide dam
Outburst flood
Rock-avalanche
Seism
dam
flood
landslide
outburst
rock avalanche
seismic source
trigger mechanism
Argentina
González Díaz, E.F.
Giaccardi, A.D.
Costa, C.H.
The Barrancas rock-avalanche, of northern Neuquén Province (Argentina): Its relation to the outburst flood of December 29, 1914
topic_facet Breach
Carrilauquen
Landslide dam
Outburst flood
Rock-avalanche
Seism
dam
flood
landslide
outburst
rock avalanche
seismic source
trigger mechanism
Argentina
description At some unknown time in the past, instability of the slope of C° Pelán resulted in a rock-avalanche that blocked the Barrancas valley as a landslide dam and formed the Carrilauquen lagoon. It is suggested that the trigger was a seismic shock, that resulted in complex movement of a proximal planar slide and a distal flow, with a velocity estimated at about 270 km/h. After obstructing the valley the avalanche climbed up the opposite side for over 180 meters. The Carrilauquen lagoon was over 22 km long and 100 m deep. The exceptionally snowy winter of 1914, followed by a very warm spring-summer season, resulted in a great inflow of water into the lagoon that raised its level until it overtopped the natural dam and caused it to collapse when weakened by increased hydrostatic pressure. A huge outburst flood (jokulklaup; aluvión) flowed through the breach, and caused great devastation in the Barrancas and Colorado valleys for over 1,250 km as far as the Atlantic coast. Some rock-avalanche morphometric parameters are estimated and associated geomorphological features are described. Oral accounts by local residents and contemporaneous newspaper reports were the principal sources for describing the damage downstream of the Barrancas landslide dam.
format JOUR
author González Díaz, E.F.
Giaccardi, A.D.
Costa, C.H.
author_facet González Díaz, E.F.
Giaccardi, A.D.
Costa, C.H.
author_sort González Díaz, E.F.
title The Barrancas rock-avalanche, of northern Neuquén Province (Argentina): Its relation to the outburst flood of December 29, 1914
title_short The Barrancas rock-avalanche, of northern Neuquén Province (Argentina): Its relation to the outburst flood of December 29, 1914
title_full The Barrancas rock-avalanche, of northern Neuquén Province (Argentina): Its relation to the outburst flood of December 29, 1914
title_fullStr The Barrancas rock-avalanche, of northern Neuquén Province (Argentina): Its relation to the outburst flood of December 29, 1914
title_full_unstemmed The Barrancas rock-avalanche, of northern Neuquén Province (Argentina): Its relation to the outburst flood of December 29, 1914
title_sort barrancas rock-avalanche, of northern neuquén province (argentina): its relation to the outburst flood of december 29, 1914
url http://hdl.handle.net/20.500.12110/paper_00044822_v56_n4_p466_GonzalezDiaz
work_keys_str_mv AT gonzalezdiazef thebarrancasrockavalancheofnorthernneuquenprovinceargentinaitsrelationtotheoutburstfloodofdecember291914
AT giaccardiad thebarrancasrockavalancheofnorthernneuquenprovinceargentinaitsrelationtotheoutburstfloodofdecember291914
AT costach thebarrancasrockavalancheofnorthernneuquenprovinceargentinaitsrelationtotheoutburstfloodofdecember291914
AT gonzalezdiazef barrancasrockavalancheofnorthernneuquenprovinceargentinaitsrelationtotheoutburstfloodofdecember291914
AT giaccardiad barrancasrockavalancheofnorthernneuquenprovinceargentinaitsrelationtotheoutburstfloodofdecember291914
AT costach barrancasrockavalancheofnorthernneuquenprovinceargentinaitsrelationtotheoutburstfloodofdecember291914
_version_ 1807316820827308032

Ejemplares similares