Historical Tephra-stratigraphy of the Cosigüina Volcano (Western Nicaragua)

Historical Tephra-stratigraphy of the Cosigüina Volcano (Western Nicaragua)

New detailed geological field studies and 14C dating of the Cosigüina Volcano (westernmost Nicaragua) allow to reconstruct a geological map of the volcano and to establish a recent stratigraphy, including three historical eruptions. Five major sequences are represented. I: pyroclastic flows around 1...

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Main Authors: Hradecký, Petr, Rapprich, Vladislav
Format: Online
Language:spa
Published: Universidad de Costa Rica 2007
Online Access:https://revistas.ucr.ac.cr/index.php/geologica/article/view/4217
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spelling RGAC42172023-04-26T01:46:48Z Historical Tephra-stratigraphy of the Cosigüina Volcano (Western Nicaragua) Hradecký, Petr Rapprich, Vladislav Volcán Cosigüina tefraestratigrafía Nicaragua Golfo de Fonseca datación C Cosigüina volcano tephra-stratigraphy Fonseca Gulf C dating New detailed geological field studies and 14C dating of the Cosigüina Volcano (westernmost Nicaragua) allow to reconstruct a geological map of the volcano and to establish a recent stratigraphy, including three historical eruptions. Five major sequences are represented. I: pyroclastic flows around 1500 AD, II: pyroclastic flows, scoria and pumice flows and surges, III: pyroclastic deposits related to a litoral crater, IV: pyroclastic flows related to 1709 AD eruption, and finally, V: pyroclastic deposits corresponding to the cataclysmic 1835 AD phreatic, phreatomagmatic and subplinian eruption, which seems to be relatively small-scale in comparison with the preceding historical eruptions. The pulsating geochemical character of the pyroclastic rocks in the last five centuries has been documented. The beginning of every eruption is marked by increasing contents of silica and Zr. Based on that, regardless of present-day volcanic repose, the entire Cosigüina Peninsula should be considered as a very hazardous volcanic area. Universidad de Costa Rica 2007-04-11 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Article Text application/pdf https://revistas.ucr.ac.cr/index.php/geologica/article/view/4217 10.15517/rgac.v0i38.4217 Revista geológica de América central; Vol. 38 (2008) Revista geológica de América central; Vol. 38 (2008) 2215-261X 0256-7024 spa https://revistas.ucr.ac.cr/index.php/geologica/article/view/4217/4041 Derechos de autor 2014 Revista Geológica de América Central
institution Universidad de Costa Rica
collection Revista Geológica de América Central
language spa
format Online
author Hradecký, Petr
Rapprich, Vladislav
spellingShingle Hradecký, Petr
Rapprich, Vladislav
Historical Tephra-stratigraphy of the Cosigüina Volcano (Western Nicaragua)
author_facet Hradecký, Petr
Rapprich, Vladislav
author_sort Hradecký, Petr
description New detailed geological field studies and 14C dating of the Cosigüina Volcano (westernmost Nicaragua) allow to reconstruct a geological map of the volcano and to establish a recent stratigraphy, including three historical eruptions. Five major sequences are represented. I: pyroclastic flows around 1500 AD, II: pyroclastic flows, scoria and pumice flows and surges, III: pyroclastic deposits related to a litoral crater, IV: pyroclastic flows related to 1709 AD eruption, and finally, V: pyroclastic deposits corresponding to the cataclysmic 1835 AD phreatic, phreatomagmatic and subplinian eruption, which seems to be relatively small-scale in comparison with the preceding historical eruptions. The pulsating geochemical character of the pyroclastic rocks in the last five centuries has been documented. The beginning of every eruption is marked by increasing contents of silica and Zr. Based on that, regardless of present-day volcanic repose, the entire Cosigüina Peninsula should be considered as a very hazardous volcanic area.
title Historical Tephra-stratigraphy of the Cosigüina Volcano (Western Nicaragua)
title_short Historical Tephra-stratigraphy of the Cosigüina Volcano (Western Nicaragua)
title_full Historical Tephra-stratigraphy of the Cosigüina Volcano (Western Nicaragua)
title_fullStr Historical Tephra-stratigraphy of the Cosigüina Volcano (Western Nicaragua)
title_full_unstemmed Historical Tephra-stratigraphy of the Cosigüina Volcano (Western Nicaragua)
title_sort historical tephra-stratigraphy of the cosigüina volcano (western nicaragua)
publisher Universidad de Costa Rica
publishDate 2007
url https://revistas.ucr.ac.cr/index.php/geologica/article/view/4217
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AT rapprichvladislav historicaltephrastratigraphyofthecosiguinavolcanowesternnicaragua
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