FOSIL FORAMINIFERA PENYUSUN FORMASI BATURAJA, DAERAH BATURAJA, SUMATERA SELATAN

Abstract

The research, which was conducted in the Baturaja area, South Sumatra, especially along the Air Rambangnia river, is aimed at finding out the planktonic and bentonic foraminifera fossils that can be found in the study area so that the relative age and depositional environment in the study area can be obtained. Relative age and depositional environment were obtained based on the presence of moderate to abundant planktonic and bentonic foraminifera fossils. The research method used is descriptive-interpretative. This method describes the data found in the field for interpretation using pre-existing theories. Planktonic foraminifera fossils found in abundance are Orbulina universa, Praeorbulina transitoria, Globigerina praebulloides, Orbulina bilobata. Meanwhile, planktonic foraminifera fossils with a moderate number are Globigerinoides conglobata, Globigerina boweri, Globigerina yeguaensis. With the presence of these planktonic foraminifera fossils, it can be seen that the relative age of the Baturaja Formation where these fossils were found is Kala Miocene. Bentonic foraminifera fossils found in abundance in the study area are Tubinella funalis, Quinqueloculina seminulum, Pileolina wiesneri, Ammonia beccari. While the bentonic foraminifera
fossils that are present in moderate numbers are Anomalina colligera. Based on the presence of these bentonic foraminifera fossils, it can be seen that the depositional environment in the study area is the Shallow Marine (Neritic).