Geophysical mapping of the old granite quarry. The granite quarry was developed by hand in the 17th and 18th centuries, convicts worked in the quarry, and the quarried stone was used for road construction. Determination of the roof of granites. Determining the depth of the quarry. Determination of the contours of the quarry. Determination of the thickness of bulk soils. Research tool GPR Loza-N, dipole antennas 100 MHz.