#TITLE_ALTERNATIVE#

• Main Author: LAGONA : (NIM :120 09 079) ; Pembimbing Dr. Ir. Yan Rizal, Dipl. Geol, RAYMOND
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/19247
• Institution: Institut Teknologi Bandung

The research is conducted in Dermaji Village and surrounding area which is included into District Banyumas and District Cilacap, Central Java (270691-275250 mT and 9177803-9182520.21 mU UTM wgs 84 zona -49) with an area of approximately 21.57 km square. <br /> <br /> <br /> <br /> <br /> <br /> The research area is divided into six geomorphological units based on the BMB classification, these are Cikopeng Fault Structure Denudation Plain Unit, Dermaji Syncline Ridge Unit, Dermaji Syncline Valley Unit, Citunggul Fault Block Ridge Unit, Pangkalan Fold Hills Unit, and Dermaji River Flood Plain Unit. The stratigraphy of research area from the oldest consistof: Sandstone- Mudstone A Unit of Middle Miocene-Upper Miocene, Breccia Unit of Upper Miocene-Lower Pliocene, and Sandstone-Mudstone B Unit of Lower Pliocene. <br /> <br /> <br /> <br /> <br /> <br /> Geological structures which is formed have orientations of northwest-southeast, north-south, and northeast-southwest that consist of strike-slip faults, thrust faults,and folds. These Structures are the result of primary stress trending northeastsouthwest. Facies associations of Halang Formation in Pangkalan River that shows the Submarine Fan environment are Proximal Channel, Distal Levee, Frontal Splay 1, Crevasse Splay dan Frontal Splay 2. Whereas Facies Association of Halang Formation in Dermaji River that show the Submarine Fan environment consist of Distal Levees 1, Frontal Splay, Crevasse Splay, dan Distal Levees 2. Based on the lithology features and association characteristics, both of the vertical succesions show the shift of sub-depositional environment which is probably caused by the change of channel feeder position and sediment supply change from time to time.