#TITLE_ALTERNATIVE#

• Main Author: LAGONA (NIM: 12009079); Pembimbing: Dr. Ir. Yan Rizal, Dipl. Geol., RAYMOND
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/19246
• Institution: Institut Teknologi Bandung

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