Petrografía y diagénesis de la secuencia clástica heterolítica asociada al límite Cretácico-Paleógeno de la Isla Gorgonilla: una contribución al conocimiento geológico del pacífico colombiano
DOI:
https://doi.org/10.15665/rp.v21i2.3156Abstract
En la costa Pacífica colombiana existe un complejo de islas e islotes con una altura aproximada de 90 a 338 metros sobre el nivel del mar (msnm), declaradas Patrimonio de la Humanidad por la UNESCO, forjada por diversos procesos geotectónico entre las placas oceánica del Pacífico (actual Nazca) y Sudamericana; constituida por rocas sedimentaria, volcanosedimentarias e ígnea. Esta investigación tiene como objetivo analizar la petrografía y diagénesis de la secuencia clástica heterolítica asociada al límite cretácico-paleógeno de la Isla Gorgonilla: una contribución al conocimiento geológico del pacífico colombiano. Conllevando a concluir que la petrografía refleja una variación composicional, comportamientos bimodales, alta afinidad con las rocas del basamento de la isla, procesos de cambios en la fuente y retrabajamiento dentro de la cuenca. La facilidad del reconocimiento óptico de los constituyentes que componen estas rocas indica un escaso grado de alteración, ningún tipo de cambios significativos postdepositacionales y procesos diagenéticos tempranos.
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