Upper Tertiary chronosequence stratigraphy of offshore Sabah and Sarawak, NW Borneo, Malaysia: A unified scheme based on graphic correlation

Abstract

Graphic correlation analysis of biostratigraphic data from wells drilled in Sabah and Sarawak reveals that their Upper Tertiary sections consist of numerous chronosequences that are separated by hiatuses (unconformities or condensed sections). These hiatuses converge and diverge and are highly variable in duration, but their timing and maximum durations are similar, although not identical, between Sabah and Sarawak. This similarity forms the basis for a single, unified stratigraphic framework for Sabah and Sarawak. Major tectonic, and possibly eustatic, events had a widespread effect on sedimentation in both regions.