EVIDENCE OF BACKSTEPPING CARBONATE PLATFORM DURING OLIGO-PLIOCENE IN LANDAS AREA, EASTERN TIP MANGKALTHAT PENINSULA, EASTERN BORNEO, INDONESIA

摘要

The aim of this study is to have a better understanding of the distribution and development of carbonate facies of the Oligo-Miocene Tendehantu and Tabalar (undivided) Formations using field data, petrography, and fossil analysis. Both formations are well exposed in the Landas Area along the eastern tip of the Mangkalihat Peninsula. Sedimentary structures found in the outcrops include parallel-bedding, cross-bedding, and graded bedding. Calcrete and dense vegetation covers some of the outcrops in the area.