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 ...

Verfasser: Martínez R., Jose Ignacio
Vergara S., Luis Eduardo
Dokumenttyp: Artículo de revista
Erscheinungsdatum: 1999
Verlag/Hrsg.: Departamento de Geociencias
Schlagwörter: Geología / Ciencias de la tierra / Geociencias
Sprache: Spanish
Permalink: https://search.fid-benelux.de/Record/base-29665290
Datenquelle: BASE; Originalkatalog
Powered By: BASE
Link(s) : https://repositorio.unal.edu.co/handle/unal/42054

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) phase is suggested for the late Aptian - early Albian (Socota and lower Capotes Formations) implying tectonic restriction of the basin and a deep-water setting. Anoxia at the sediment-water interface is inferred for intervals at the early Aptian (Trincheras Formation), the late Aptian - early Cenomanian (Socota, Capotes and Hilo Formations), the Turonian - Coniacian (La Frontera and Conejo Formations), and the late Campanian (the Plaeners Formation). West of the Bituima Fault, at least two sequences can be interpreted, begining with the Coniacian Lomagorda Formation and ending with the regressive Maastrichtian Nivel de Lutitas y Arenas. These distal, offshore facies were strongly influenced by upwelling (and anoxia) during the Coniacian - Santonian (Lidita Inferior Formation) and Campanian (Lidita Superior Formation) intervals. A correlation between both stratigraphic settings is attempted. ; Se presentan aquí los resultados del estudio estratigráfico, micropaleontológico y petrográfico de cerca de 4000 m del registro cretácico de la región del Tequendama y oeste de la Sabana de Bogotá, Grupos Villeta, Guadalupe y Olini, y la Formación Lomagorda. Se reconocen dos cintas de facies, aparentemente controladas temporalmente por la Falla de Bituima. AI este de esta falla, se interpretan por lo menos seis secuencias sedimentarias, comenzando por las rocas silíceo-calcáreas del Barremian tardío de la Formación Trincheras y terminando ...