formations soil units hazards review geologic literature geologic maps geotechnical reports engineering plans environmental reports stereoscopic aerial photographs remote sensing data global positioning system gps data topographic maps satellite imagery excavation sampling logging earth rock materials drilled borings backhoe test pits trenches fault trenching bulldozer pits geophysical surveys seismic refraction traverses resistivity surveys ground penetrating radar gpr surveys magnetometer surveys electromagnetic surveys high resolution sub bottom profiling geophysical methods deformation monitoring systematic measurement tracking alteration shape dimensions object
Applied science Engineering and technology Civil Engineering Geotechnical engineering Engineering geology