Dendrogeomorphic reconstruction of mass movements and lahars in Barrancas Seca and Ojo Salado, Pico de Orizaba, Mexico
The analysis of tree growth rings has been used to spatially and temporally reconstruct geomorphological processes of the recent past in different environments. Trees have proven to be a reliable source of information in sites of difficult access where data are scarce or non-existent, as in the case...
| Autores: | , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2022 |
| País: | México |
| Recursos: | UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO |
| Repositorio: | Investigaciones Geográficas |
| Idioma: | español |
| OAI Identifier: | oai:ojs.pkp.sfu.ca:article/60470 |
| Acesso em linha: | https://www.investigacionesgeograficas.unam.mx/index.php/rig/article/view/60470 |
| Access Level: | acceso abierto |
| Palavra-chave: | dendrogeomorfología caída de rocas deslizamientos lahares Pico de Orizaba |
| Resumo: | The analysis of tree growth rings has been used to spatially and temporally reconstruct geomorphological processes of the recent past in different environments. Trees have proven to be a reliable source of information in sites of difficult access where data are scarce or non-existent, as in the case of several volcanic gorges in central Mexico. This research was carried out in the Barranca Seca and Ojo Salado located northeast of the Pico de Orizaba volcano, where mass movements (landslides and rockfalls) and lahars were analyzed from samples of three conifers: Pinus hartwegii, Pinus patula and Abies religiosa. The number of tree disturbances associated with mass movement was 29 and the most common were: scars (45%) and Tangential Rows of Traumatic Resin Ducts or TRD (21%). In the case of lahars, the total number of disturbances was 70, and the most frequent were: TRD (61%) and scars (20%). The reconstruction of geomorphological processes was carried out from 1983 to 2018 in sectors A and B. In sector A, 11 rockfall events were dated. In sector B, 6 mass movements were identified and 11 lahars. In addition, the historical data on hurricanes and tropical storms allowed us to identify the possible triggers of the geomorphological processes studied. The results obtained in this research provide information that may be relevant for the management of Pico de Orizaba National Park. |
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