Applied Geophysics: A Brief Survey of the Development of Apparatus and Methods Employed in the Investigation of Subterranean Structural Conditions and the Location of Mineral Deposits |
Common terms and phrases
alternating current angle anomalies anticlines apparatus axis beam body brass carried centre coil conducted conductor consists curvature deflecting magnet density depth designed determined Diagram DIP CIRCLE direction distance disturbances earth earth's magnetic field earthquake effects Elbof electrical methods electrodes employed equipotential lines explosion point Galitzin geological geophysical methods gradients ground horizontal component inclined indicated indirect wave instrument intervals introduced investigations knife edges located magnetic meridian magnetic method magnetic survey magnetic susceptibility magnetic system magnetite magnetometer mass means measurements Microid MINING COMPASS Mintrop mirror modification motion Museum needle observations Observatory obtained oscillograph pendulum photographic plane portable position potential pyrites Rayleigh waves record resistivity rocks rotation salt domes scale Schlumberger Schweydar seismic method seismograph sensitivity shown shows spontaneous polarization stations structures subterranean surface suspended telescope Terrella torsion balance traverse variation variometer velocity vertical component vertical intensity vibration wire