Abstract The research focuses on the Klapanunggal Formation, composed of limestone in West Java Basin, specifically area, District, Bogor Regency, Province. A massive outcrop was found this location. method used is field data collection, stratigraphic cross-section measurement, and petrographic analysis. It aims to determine facies characteristics, depositional environment, association Formatio...

The radiolarian chert rocks are one of the most important indications existence ophiolites because they a source silica supply. These have been studied to refute and reject idea that do not existed. Si/(Si+Al+Fe+Ca) ratio in indicates is biogenic origin adds SiO2 from shale fraction through diagenetic processes. high values Fe2O3 content indicate hydrothermal effect during precipitation. This c...