#TITLE_ALTERNATIVE#

• Main Author: ROZAK HANAFI (NIM 12005029), BARI
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/13324
• Institution: Institut Teknologi Bandung

This location consists of six units of rocks. Unit of Ultramafic and Mafic as the oldest unit at the location and followed by Unit of Limestone I, Unit of Sandstone – Claystone, Unit of Fragmental Claystone, Unit of Limestone II and also Unit of Alluvium which is deposited unconformably on all of those rocks as the youngest unit. All of these units is bordered by the tectonic contact due to the occurrence of three main faults at this location. The two main faults are Entrop Fault which is a dextral strike-slip fault, located at the northern area and Abepura Fault which is a sinistral strike-slip fault, located at the southern area. Stratigraphically, Ultramafic and Mafic Unit as the oldest unit was formated at oceanic crust environment during Pre-Tertiary period. Meanwhile, in other depositional environment, during Oligocene – Early Miocene epoch, Unit of Limestone I was deposited at the neritic environment and conformably followed by the deposition of Sandstone-Claystone Unit during Early Miocene – Middle Miocene. Furthermore, Unit of Fragmental Claystone was deposited. The depositional environment of this unit was the deep sea environment, which was particularly associated with melange accretion. Typically, this unit is recognized by scaly clay matrix, poorly sorted with sedimentary rock, igneous rock and also metamorphic rock fragment with various size, start from 1 cm until more than 50 m. More after, relatively drop sea level made the process of formation Unit of Limestone II was possible. Finally, the last process was the tectonic process which deformed and dragged all of these unit together in a same place like today.