SEDIMENTATION OF THE CANTAYAN FORMATION IN SIRNASARI, BOGOR, WEST JAVA-INDONESIA

The study area is located in Sirnasari area, Tanjungsari District, Bogor Regency, West Java- Indonesia and geographically located at coordinates 6o36'30"- 6o39'30" Longitude and 107o08'15 " - 107o10'30" Latitude. Stratigraphy of the study area consists of five lithology units (from old to young), they are mudstone unit, breccia unit, sandstone-claystone unit, Basalt unit, and Alluvial unit. The mudstone Unit was deposited in the inner to outer neritic environment dominated by wave shore face mechanism. The breccia and mudstone-sandstone units were udstone unit is equivalent to the Cibulakan Formation, while breccia and mudstone-sandstone Unit is the equivalent of the Cantayan Formation. Turbidite facies which found in this unit are classic turbidite facies that consists of thinly-bedded and thickly-bedded sandstone, massive sandstone facies, conglomerates, and debris flow facies. The facies change reflected a change of deposition environment, which is influenced by sea level change at the time of deposition