Reconocimiento y caracterización de la facies sedimentaria depositada por el tsunami de 1960 en el estuario Maullín, Chile

Translated title of the contribution: Recognition and characterisation of the sedimentary facies deposited by the 1960 tsunami in the Maullin estuary, Chile

MARCO ANTONIO CISTERNAS VEGA, I. Contreras, A. Araneda

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

The tsunami triggered by the earthquake of May 22, 1960, flowed violently into the Maullin River estuary. According to eyewitnesses, the tsunami deposited a widespread sand layer throughout the estuarine marshes. The aim of this study was to determine whether the sand sheet was incorporated into the estuarine stratigraphy. A sedimentological analysis of the sand, located on a saltmarsh opposite Maullin, was carried out. The sand layer was found between the 1960 saltmarsh and the present soil. Considering the sand sheet grain size characteristics and tilt of the buried vegetation, it is probable that the sand was transported from the neighboring dunes and/or sandbars located in the estuary mouth. The spatial distribution of granulometric parameters shows that the marsh vegetation reduced the wave transport capacity during seawater run-up. This illustrates the importance of estuarine marshes in diminishing the impact of tsunamis.

Translated title of the contributionRecognition and characterisation of the sedimentary facies deposited by the 1960 tsunami in the Maullin estuary, Chile
Original languageSpanish
Pages (from-to)3-11
Number of pages9
JournalRevista Geologica de Chile
Volume27
Issue number1
StatePublished - 2000
Externally publishedYes

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