Caracterización geológica e hidrogeológica como aporte de contenidos para el museo de ciencias de Coaque.

Abstract

The studied area is located to northwest of continental Ecuador, in the Coast region, Manabí province, between Coaque and Pedernales which are into the Manabí Sedimentary Basin. This study presents a geological and hydrogeological description to generate a geological map with local scale (1:30.000) to define seven Geological Formations and preliminary groundwater flow model as from drainage analysis. The bedrock of Coast region is composed by igneous rocks of Piñón Fm. Into de Cretaceous period, Calentura Fm. is unconformity with Piñón Fm. and contemporaneous with Cayo Fm. The Calentura Fm. presents lithologies from tuffs until sandstones, while Cayo Fm. is composed by turbidites in the end of Cretaceous. To continue in the Eocene, Cerro and Punta Blanca Formations were deposited by tuffs grayish green and beige respectively. Finally, during the Miocene epoch occur the sedimentary fill with turbidites corresponding to Angostura Fm. and fine-grained sedimentary rocks such as siltstones, claystones and mudstones that belong to Subibaja Fm. Consequently, the information presented allows updating the Geological Map of the Ecuadorian Coastal Margin elaborated by Reyes and Michaud (2012). On the other hand, the preliminary groundwater flow model has been developed based on the drainage analysis of the Cuaque River Basin and suggesting a possible aquifer who could content each Geological Formation.