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 mesurement results obtained using geoelectric method is 3x10-2.0x10 W m coincide with the resistivity values of andhesite in literatur. Based on soil layer contour obtained from software Res2Div it can be determined the position of andhesit.