Abstract
Identification of the distribution of andesite rocks have been conducted in Kalirejo village, Kokap district, Kulon Progo regency, Special Region of Yogyakarta based on geoelectrical tomography data. Kulon Progo is a mountain area that occupies one of the mountains in South Serayu area. The mountain area of Kulon Progo consists of formation, constituting one is Old Andesite Formation. Resistivity data taken using Resistivitymeter OYO model 2119C McOHM-EL, while the configuration is dipole-dipole. The result obtained from this study, there is an andesite rocks in the northen part of the site and the volume is 3.88 x 106 m3. The andesite is covered by clay and sand with thickness of 6.84 m.
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