GEOLOGICAL FEATURES Depth to bedrock Location of faults and fracture zones Fault displacement Location and character of buried valleys Lithological determination Stratigraphy Location of basic igneous dykes PETROPHYSICAL INFORMATION Elastic moduli Density Attenuation Porosity Elastic wave velocities Anisotopy Rippability APPLICATIONS Engineering site investigations Rock competence Sand and gravel resources Detection of cavities Seabed integrity Preconstruction site suitability Hydrogeology and groundwater exploration Ground particle velocities Forensic applications