Geoelectric method based on the dipole-dipole configuration is used to determine soil layer resitivity. the longest space between two concecutive electrodes is 10 m and the depth of electrodes penetration is 17.5. The measurement results obtained using geoelectric method is 3 x 1000 - 2.0 x 100000 W m coincide with the resistifity values of andhesite in literature. Based on soil layer countour obtained from software Res2Div it can be determined the position of andhesit.