#TITLE_ALTERNATIVE#

• Main Author: DWI WAHYU ARDI (NIM : 120 11 064), RYAN
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/30740
• Institution: Institut Teknologi Bandung

<p align="justify">Research was done in Patikraja District and its surrounding area which is administratively part of Banyumas Regency, Central Java. This research covered <br /> 65,87 km2 area which geographically lies in coordinate 301043.00 - 308793.00 mE dan 9168135.46 - 9176635.46 mS (UTM WGS 84 zona 49S). The research area divided into three geomorphological units: Patikraja Homoclinal Hills Unit, Serayu Aluvial Plain Unit, and Kebasen Anticlinal Hills Unit. It showed rectangular and dendritic drainage pattern which indicated that it is influenced by fault and fractures. Based on the erosion process that occurred, <br /> the research area is categorized in mature geomorphic stage. The research area's lithostratigraphic is divided into six units. Those units are Breccia Unit as the oldest units which is deposited in Late Miocene Epoch, Sandstone-Claystone unit which is deposited in conformity above Breccia Unit during Late Miocene Epoch, Claystone Unit which is deposited in conformity above Sandstone–Claystone unit during Late Miocene-Late Pliocene Epoch, Sandstone Unit which is deposited in conformity above Claystone Unit during Late Pliocene Epoch, Basalt Intrusion Unit which break through the older unit during Pleistocene Epoch, and Aluvial Deposit Unit which is deposited in disconformity above the older unit until recently. Deformation was occured during Pleistocene Epoch which formed folds and faults structure in the research area. The formed geological structure show mainly NNE-SSW stress trending. <br /> Biostratigraphy analysis was performed based on the foraminifera data. 36 species of planktonic foraminifera and 52 species of benthonic foraminifera were found. Eight biostratigraphic zones were determined. Those zones are Hastigerina siphonifera Partial Range Zone, Hastigerina siphonifera-Neogloboquadrina humerosa Range Zone, Neogloboquadrina humerosa-Globorotalia tumida tumida Range Zone, Globorotalia tumida-tumida-Globorotalia merotumida <br /> Range Zone, Globorotalia merotumida-Globigerina venezuelana Range Zone, Globigerina venezuelana-Pulleniatina primalis Range Zone, Pulleniatina primalis-Globoquadrina altispira Range Zone, and Globoquadrina altispira Partial Range Zone. Foraminifera data analysis generally showed regressive trend in depositional environment change during Late Miocene (N16 Zone) until Late Pliocene (N21 Zone) with pulse transgression happened briefly in Early Pliocene (N18 Zone). <p align="justify">