Mega-tsunami conglomerates and flank collapses of ocean island volcanoes

Paris, Raphael, Ramalho, Ricardo S., Madeira, Jose, Avila, Sergio, May, Simon Matthias, Rixhon, Gilles, Engel, Max, Bruckner, Helmut, Herzog, Manuel, Schukraft, Gerd, Perez-Torrado, Francisco Jose, Rodriguez-Gonzalez, Alejandro, Carracedo, Juan Carlos and Giachetti, Thomas 2018. Mega-tsunami conglomerates and flank collapses of ocean island volcanoes. Marine Geology 395 , pp. 168-187. 10.1016/j.margeo.2017.10.004

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Abstract

<p>Marine conglomerates at high elevation on the flanks of ocean islands are usually interpreted as evidence of mega-tsunamis generated by volcano flank collapses, although their origin is sometimes debated (elevated littorals vs. tsunami). In this review, we introduce case studies of well-documented examples of tsunami conglomerates in Hawaii (Pacific Ocean), the Canary and Cape Verde Islands (Atlantic Ocean), and Mauritius Island (Indian Ocean). Other less-documented marine conglomerates are also presented as tsunami candidates. Then, we build a comprehensive picture of the general characteristics of these conglomerates and the different methods that can be applied to date them. Different perspectives of research are proposed, especially on the use of tsunami conglomerates as proxies for better constraining numerical models of ocean island flank collapses and associated tsunamis. We also discuss the possible links between volcano growth, flank instability, and climate.</p>

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Earth and Environmental Sciences
Publisher:	Elsevier
ISSN:	0025-3227
Date of Acceptance:	3 October 2017
Last Modified:	22 Jun 2021 13:45
URI:	https://orca.cardiff.ac.uk/id/eprint/142112

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