Mega-rasgos geomorfológicos del modelo de elevación digital, asociados al Volcán Barva
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Authors
Obando Acuña, Luis Guillermo
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Publisher
Universidad de Costa Rica
Abstract
Description
El modelo de elevación digital a partir del mapa topográfico mostró mega-rasgos que geomorfológicamente corresponden con las siguientes tipos de laderas: 1) Laderas denudacionales de topografía suaviza-da hacia el sur y oeste del volcán Barva, las cuales tienen un patrón de drenaje radial, un extenso campo de piro-clastos recientes los cuales recubren coladas de lavas. 2) Laderas denudacionales de topografía abrupta y escar-pada hacia el este de dicho volcán, formadas en depósitos de avalancha (debris avalanche) y cortadas por dre-najes de tipo radial y paralelo. En este modelo, es notoro la Falla de Alajuela, una falla inversa que genera unpliegue volcado representado por un fuerte escarpe de dirección grosea este-oeste.
The digital-elevation model have been made using the topographic map. The model shows follo-wing mega-features 1) Gentle denudational slopes, located towards south and west of Barva volcano. The drai-nage pattern is radial and this mega-feature is formed by recent pyroclastics that overlays lava flows. 2) Strongdenudational slopes, located towards east of Barva volcano, the drainage pattern is radial and parallel and thetopography is abrupt and eroded, probably ancient, formed by a possible debris avalanche. Another mega-fea-ture is Alajuela Fault, a inverse fault that produced a recumbent fold. This fold is represented by a high scarp.
The digital-elevation model have been made using the topographic map. The model shows follo-wing mega-features 1) Gentle denudational slopes, located towards south and west of Barva volcano. The drai-nage pattern is radial and this mega-feature is formed by recent pyroclastics that overlays lava flows. 2) Strongdenudational slopes, located towards east of Barva volcano, the drainage pattern is radial and parallel and thetopography is abrupt and eroded, probably ancient, formed by a possible debris avalanche. Another mega-fea-ture is Alajuela Fault, a inverse fault that produced a recumbent fold. This fold is represented by a high scarp.
Keywords
volcán barva, costa rica, modelo de elevación digital, mega-rasgos, depósitos de avalancha, barva volcano, costa rica, digital elevation model, mega-features, debris avalanche