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The AAPG/Datapages Combined Publications Database
AAPG Special Volumes
Abstract
2003. The American Association of Petroleum Geologists. All rights reserved.
Stratigraphical and Sedimentological Constraints on Western Colombia: Implications on the Evolution of the Caribbean Plate
Mario Moreno Sanchez, Andr
s Pardo-Trujillo
s Pardo-Trujillo Universidad de Caldas, Departamento de Ciencias Geol
gicas, Calle 65 no. 26-10, Manizales, Colombia
ACKNOWLEDGMENTS
This research was supported partially by the Centro de Investigaciones y Desarrollo Cientifico (Universidad de Caldas, Colombia). Special thanks to M. Fairon-Demaret (University of Liege, Belgium) for her comments and the first revision of the English text; two anonymous reviewers for their valuable comments; and Arley Gmez Cruz (University of Caldas) for his collaboration in the first part of this research. Thanks to F. Etayo-Serna (Universidad Nacional, Bogot
) and Ignacio Martinez (Universidad Eafit, Medell
n) for the identification of some fossils. Special thanks go to A. Nivia (Ingeominas, Cali) for his constructive remarks and for sharing with us unpublished information. Thanks go to A. C. Kerr and D. Burke for their constructive criticism of this work.
ABSTRACT
New data on five regions of western Colombia combined with available information allow us to suggest that at least five structural complexes constitute the northwestern border of South America: Quebradagrande-Alao, Arqua-Guamote, Amaime-Chaucha, Cordillera Occidental, and Panam-Choc. The geologic characteristics and age of these complexes support the hypothesis of the Pacific origin of the Caribbean; we propose that the origin of these complexes are related to progressive accretion of oceanic blocks against northwestern South America in the following phases: Early Cretaceous diagonal accretion of the proto-Caribbean oceanic crust with an associated volcanic arc, Late Cretaceous diagonal collision of the Caribbean plate (oceanic plateau) against northwestern South America, followed by a frontal collision during the early Tertiary.
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