Güímar and La Orotava mega-landslides (Tenerife) and tsunamis deposits in Canary Islands

Lomoschitz Mora-Figueroa, Alejandro and Ferrer, Mercedes and García, Carlos J. (2011). Güímar and La Orotava mega-landslides (Tenerife) and tsunamis deposits in Canary Islands. In: "The Second World Landslide Forum", 03/10/2011 - 09/10/2011, Roma. ISBN 9788844805159. p. 691.

Description

Title: Güímar and La Orotava mega-landslides (Tenerife) and tsunamis deposits in Canary Islands
Author/s:
  • Lomoschitz Mora-Figueroa, Alejandro
  • Ferrer, Mercedes
  • García, Carlos J.
Item Type: Presentation at Congress or Conference (Article)
Event Title: The Second World Landslide Forum
Event Dates: 03/10/2011 - 09/10/2011
Event Location: Roma
Title of Book: The Second World Landslide Forum. Abstract Book
Date: 2011
ISBN: 9788844805159
Subjects:
Faculty: E.T.S.I. Minas (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

More than 20 mega-landslides have been described in the Canary Islands affecting the flanks of the volcanic edifices. Gliimar and La Orotava landslides, in Tenerife, are two exceptional cases due to their huge dimensions and outstanding geomorphological features. The estimated volume of these landslides exceed tens of cubic km. Tsunami deposits have been also identified in some of the islands of the archipelago probably associated to the large landslides of the islands flanks. An investigation has been carried out to explain the causes of these large instability processes and their failure mechanisms. One of the main aspects investigated was the geomechanical characteristics of the volcanic rock masses, specially the hyaloclastite rocks forming the substratum underlying the emerged volcanic building. The low strength and high deformability properties of these rocks have played a fundamental role on the stability of the island flanks. The results have shown the gravitational origin of these instability processes as the main failure mechanism. Volcanic eruptions or large earthquakes could be contributing factors to the instability, but according with the data obtained in Gliimar and La Orotava cases they are not necessary as triggering factors. As a result of the field work carried out in the frame of the project, three large tsunami deposits have been identified in the islands of Lanzarote, Tenerifc and Gran Canaria attributed to rnega-Iandslides, possibly related to Guimar and La Orotava. A Sumrnary of their main features is described.

More information

Item ID: 21162
DC Identifier: http://oa.upm.es/21162/
OAI Identifier: oai:oa.upm.es:21162
Official URL: http://www.unisdr.org/we/inform/publications/24779
Deposited by: Memoria Investigacion
Deposited on: 07 Oct 2013 11:23
Last Modified: 22 Sep 2014 11:22
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