A possible Plio-Pleistocene tsunami deposit, Hornitos, northern Chile

A section equivalent to the Pliocene La Portada Formation exposed in the coastal cliff at Hornitos, northern Chile, contains a ca. 7-10 m thick conglomerate bed. The bed occurs within a succession of shallow marine sandstones and has an erosional contact with underlying strata. The largest boulders...

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Autores principales:	Hartley,Adrian, Howell,John, Mather,Anne E., Chong,Guillermo
Lenguaje:	English
Publicado:	Servicio Nacional de Geología y Minería (SERNAGEOMIN) 2001
Materias:	tsunami northern Chile Pliocene shallow marine Shallow marine Tsunami Northern Chile
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-02082001000100007
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spelling	oai:scielo:S0716-020820010001000072001-11-07A possible Plio-Pleistocene tsunami deposit, Hornitos, northern ChileHartley,AdrianHowell,JohnMather,Anne E.Chong,Guillermo tsunami northern Chile Pliocene shallow marine Shallow marine Tsunami Pliocene Northern Chile A section equivalent to the Pliocene La Portada Formation exposed in the coastal cliff at Hornitos, northern Chile, contains a ca. 7-10 m thick conglomerate bed. The bed occurs within a succession of shallow marine sandstones and has an erosional contact with underlying strata. The largest boulders of basement (5 m) are angular to very angular and are set within a matrix of very poorly sorted fine to very coarse grained shell-rich sandstone. Also present are very well rounded granodiorite pebbles and shallow marine sandstone intraclasts (maximum 10 m). The clast size, erosional contact, associated facies and bed thickness suggests that the conglomerate bed is a shallow marine tsunami deposit. The angular clasts indicate limited transport and no marine reworking prior to deposition. They represent alluvial fan sediment incorporated into the bed during tsunami backflow. Intraclasts of shallow marine sandstone are thought to have been ripped up and included in the bed during the seaward passage of the tsunami across the shorefaceinfo:eu-repo/semantics/openAccessServicio Nacional de Geología y Minería (SERNAGEOMIN)Revista geológica de Chile v.28 n.1 20012001-07-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-02082001000100007en10.4067/S0716-02082001000100007
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	tsunami northern Chile Pliocene shallow marine Shallow marine Tsunami Pliocene Northern Chile
spellingShingle	tsunami northern Chile Pliocene shallow marine Shallow marine Tsunami Pliocene Northern Chile Hartley,Adrian Howell,John Mather,Anne E. Chong,Guillermo A possible Plio-Pleistocene tsunami deposit, Hornitos, northern Chile
description	A section equivalent to the Pliocene La Portada Formation exposed in the coastal cliff at Hornitos, northern Chile, contains a ca. 7-10 m thick conglomerate bed. The bed occurs within a succession of shallow marine sandstones and has an erosional contact with underlying strata. The largest boulders of basement (5 m) are angular to very angular and are set within a matrix of very poorly sorted fine to very coarse grained shell-rich sandstone. Also present are very well rounded granodiorite pebbles and shallow marine sandstone intraclasts (maximum 10 m). The clast size, erosional contact, associated facies and bed thickness suggests that the conglomerate bed is a shallow marine tsunami deposit. The angular clasts indicate limited transport and no marine reworking prior to deposition. They represent alluvial fan sediment incorporated into the bed during tsunami backflow. Intraclasts of shallow marine sandstone are thought to have been ripped up and included in the bed during the seaward passage of the tsunami across the shoreface
author	Hartley,Adrian Howell,John Mather,Anne E. Chong,Guillermo
author_facet	Hartley,Adrian Howell,John Mather,Anne E. Chong,Guillermo
author_sort	Hartley,Adrian
title	A possible Plio-Pleistocene tsunami deposit, Hornitos, northern Chile
title_short	A possible Plio-Pleistocene tsunami deposit, Hornitos, northern Chile
title_full	A possible Plio-Pleistocene tsunami deposit, Hornitos, northern Chile
title_fullStr	A possible Plio-Pleistocene tsunami deposit, Hornitos, northern Chile
title_full_unstemmed	A possible Plio-Pleistocene tsunami deposit, Hornitos, northern Chile
title_sort	possible plio-pleistocene tsunami deposit, hornitos, northern chile
publisher	Servicio Nacional de Geología y Minería (SERNAGEOMIN)
publishDate	2001
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-02082001000100007
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A possible Plio-Pleistocene tsunami deposit, Hornitos, northern Chile

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