Biostratigraphy Analysis in Determining The Age and Depositional Environment at Telisa Formation, Desa Tabing Kampar, Riau
Abstract. The study area is located in Tabing village, Kampar, Riau, which is included
in Telisa Formation, Central Sumatra basin. Telisa Formation is a seal or cap rock of
the petroleum system in the Central Sumatra basin. Biostratigraphy analysis was
determine in two stages, the first stage is field data aquisition using channel sampling
analysis method by conducting lithological data of each layers and producing simple
log outcrops. The second stage is data processing that has been conducted in the
laboratory by washing and drying the rock sample until the analysis phase under
binocular microscope. Planktonic foraminifera analysis would be given the relative age
and foraminifera bentonic analysis would obtained the depositional environment of the
study area. Lithology of the study area consist of shale and sandstone. Microfossil
analysis from both llithology indicated that relative age of the study area is in Middle-
Upper Miocene (N9-N21) and the depositional environment is in the Middle Neritic
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