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NUNEZ, FERNANDO J., and GERARD N. SOTO TOVER, Lagoven S.A., Caracas, Venezuela

ABSTRACT: Integration of Geologic Data by Applying Sequence Stratigraphic Methods to Foreland Basins

Much doubt exists about the application of Sequence Stratigraphy in areas of strong tectonic influence. The purpose of this paper is to demonstrate the wide applicability of Sequence Stratigraphy as an alternative to classical lithostratigraphy by utilizing this tool to explain deformed geometries of passive margin basins described by Vail et al as they became deformed within the foreland basins.

The information that is summarized in the present study is the result of the integration of existing data in an area of the Eastern Venezuela Basin.

We combined the biostratigraphic data (abundance and diversity curves of fossils from planktonic and benthonic foraminifera to calcareous nannoplancton and palinomorphs) with their depth relation to the electrical log in order to identify condensed sections and sequence boundaries in the manner of Vail and Wornardt. Dipmeter data is incorporated in this study by using stereoplots of structural poles which allows a priori determination of the source and direction of basin fill and reconstruction of the paleogeography.

Combining all of these analytical elements one derives a conceptual geological model that is then transferred into the interpretation of the seismic lines.

AAPG Search and Discovery Article #90988©1993 AAPG/SVG International Congress and Exhibition, Caracas, Venezuela, March 14-17, 1993.