GEOLOGI DAN POROSITAS SATUAN BATUPASIR KARBONATAN HALANG SEBAGAI AKUIFER DAERAH KARANGMOJO DAN SEKITARNYA KECAMATAN KARANGGAYAM, KABUPATEN KEBUMEN, PROVINSI JAWA TENGAH

Abstract

The research area is located in Karangmojo Village and its surroundings, Karanggayam District, Kebumen Regency, Central Java Province. The research area is physiographically included in the southern Serayu mountain zone (van Bemmelen, 1949). Stratigraphically, the research area is divided into six units, namely the Chert unit, the Karangsambung carbonate mudstone rock unit, the Totogan polemic breccia rock unit, the Waturanda andesite breccia rock unit, the Penosogan carbonate sandstone rock unit and the Halang carbonate sandstone rock unit. The ages of the oldest to youngest rocks are Paleocene to Late Miocene. The research area is divided into three geomorphological units, namely the denudational hills and medium-steep slopes unit (D1), the denudational mountains and hillsides unit (D2) and the structural anticline and syncline hills unit (S9). The research area has the potential for sandstone as a rock that can store and channel water (aquifer), so that it can be used by local communities to support subsurface water needs.

Keywords: Geology, Stratigraphy, Geomorphology, Aquifer.