--> Conditions Necessary for Lateral Correlatability of Sequence Boundaries -An Overview, by Mary Taiwo Olowokere and John Sunday Ojo; #90037 (2005)
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Conditions Necessary for Lateral Correlatability of Previous HitSequenceNext Hit Previous HitBoundariesNext Hit -An Overview

Mary Taiwo Olowokere and John Sunday Ojo
Federal University of Technology, Akure, Nigeria

The assumption that Previous HitsequenceNext Hit Previous HitboundariesNext Hit have an eustatic origin, and hence a regional continuity, is a fundamental aspect of the conceptual framework and methodology of Previous HitsequenceNext Hit stratigraphy as formulated by Exxon group. Given this fundamental assumption, it is not surprising to find that Previous HitsequenceNext Hit Previous HitboundariesNext Hit are viewed by many authors as being regional on the scale of basin.

The- purpose of this study is to investigate whether the Previous HitseismicNext Hit-stratigraphic concept of regionally correlatable Previous HitsequenceNext Hit Previous HitboundariesNext Hit is stratigraphically tenable when considered at the level of strata resolution achievable at outcrop. The paper focuses on the laterally extensive discrete surface of onlap, downlap and toplap and stratigraphic conditions necessary for their development.

The geometric properties and chronostratigraphic significance of Previous HitsequenceNext Hit Previous HitboundariesNext Hit were formulated from Previous HitseismicNext Hit observations of strata relationships. These observations were however subject to the limitations of the vertical resolution of the Previous HitseismicNext Hit data. In this respect the conceptual framework was derived from a seismically simplified representation of the true stratal relationships.

The study showed that a surface of stratal discontinuity characterized by on lap, downlap or toplap can only be discrete and correlatable over an extremely limited area, except under specific and restricted conditions. Therefore, Previous HitsequenceNext Hit Previous HitboundariesTop defined from onlaps, down lap or toplap should not be expected to be correlatable as discrete and valid stratigraphic surfaces over large distances in any study area.