HISTORICAL TEPHRA-STRATIGRAPHY OF THE COSIGÜINA VOLCANO (WESTERN NICARAGUA)
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| Format: | Artículo científico |
| Langue: | en |
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Universidad de Costa Rica
2008
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| _version_ | 1876433998861828096 |
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| author | Petr Hradecký |
| author_facet | Petr Hradecký |
| contents | HISTORICAL TEPHRA-STRATIGRAPHY OF THE COSIGÜINA VOLCANO (WESTERN NICARAGUA) Petr Hradecký Vladislav Rapprich Geología tephra Nicaragua 14 C dating stratigraphy Fonseca Gulf New detailed geological field studies and 14 C 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. 2008 artículo científico 0256-7024 https://www.redalyc.org/articulo.oa?id=45437345005 en http://www.redalyc.org/revista.oa?id=454 Revista Geológica de América Central application/pdf Universidad de Costa Rica Revista Geológica de América Central (Costa Rica) Num.38 |
| format | Artículo científico |
| id | redalyc_45437345005 |
| institution | Redalyc |
| language | en |
| publishDate | 2008 |
| publisher | Universidad de Costa Rica |
| spellingShingle | HISTORICAL TEPHRA-STRATIGRAPHY OF THE COSIGÜINA VOLCANO (WESTERN NICARAGUA) Petr Hradecký Geología tephra Nicaragua 14 C dating stratigraphy Fonseca Gulf HISTORICAL TEPHRA-STRATIGRAPHY OF THE COSIGÜINA VOLCANO (WESTERN NICARAGUA) Petr Hradecký Vladislav Rapprich Geología tephra Nicaragua 14 C dating stratigraphy Fonseca Gulf New detailed geological field studies and 14 C 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. 2008 artículo científico 0256-7024 https://www.redalyc.org/articulo.oa?id=45437345005 en http://www.redalyc.org/revista.oa?id=454 Revista Geológica de América Central application/pdf Universidad de Costa Rica Revista Geológica de América Central (Costa Rica) Num.38 |
| title | HISTORICAL TEPHRA-STRATIGRAPHY OF THE COSIGÜINA VOLCANO (WESTERN NICARAGUA) |
| topic | Geología tephra Nicaragua 14 C dating stratigraphy Fonseca Gulf |
| url | https://www.redalyc.org/articulo.oa?id=45437345005 |