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LITOSTRATIGRAFI CEKUNGAN OMBILIN DALAM KERANGKA TECTONO-SEDIMENTATION RIFT BASIN Budi Mulyana; Reza Mochamad Ganjar Gani
Bulletin of Scientific Contribution: GEOLOGY Vol 13, No 2 (2015): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (678.714 KB) | DOI: 10.24198/bsc geology.v13i2.8393

Abstract

During Tertiary, the sedimentation model in Ombilin Basin, West Sumatra, was strongly influenced by tectonisme. It is indicated by characteristic and composition of the rock, and distribution pattern for each formation. In general, it can be decided into two main groups according to the age of rocks, which associated with the tectono-sedimentation rift basin. Brani, Sangkarewang, Sawahlunto and Sawahtambang Formations were deposited in terrestrial to transition zone during syn-rift phase. Meanwhile, Ombilin and Ranau Formations, which is dominated by volcanic deposits, were formed for the period of post-rift phase indicated by marine influence has existed.