La sucesión paleoambiental del cretácico de la región de tequendama y oeste de la sabana de bogotá, cordillera oriental colombiana

A stratigraphic, micropaleontologic and petrographic survey of ca. 4000 m of the Cretaceous Villeta, Guadalupe and Olini Groups and the Lomagorda Formation outcropping in the Tequendama and west of Bogotá regions, is presented. Two facial settings are recognized, and apparently controlled at times, by the Bituima Fault. East of the Bituima Fault, at least six stratigraphic sequences can be interpreted begining with the late Barremian calcareous-siliceous rocks of the Trincheras Formation and ending with the regressive arenites of the Labor and Tierna Formations. A clastic - evaporitic (7) phas... Mehr ...