Geophysical Methods in Geology |
Contents
THE SCOPE OF GEOPHYSICS AND METHODS | 1 |
SEISMIC METHODS | 7 |
Seismology and the earths structure | 21 |
Copyright | |
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applied asthenosphere Atlantic basalts basement basin body Bouguer anomaly boundary calculated continental drift continents convection core crustal curve density contrast depth determined dipole direction distance distribution earth earthquake elastic electric electrodes estimate example fault Fennoscandia ferromagnetic formation g/cm³ geological geomagnetic field geophone geophysical gradient granite gravimeter gravity anomaly gravity effect Greenland heat flow horizontal hypothesis igneous intensity interpretation isostasy isostatic km/s layer lithosphere magnetic anomalies magnetic field magnetite magnetometer mass measurements method metres mgal mid-ocean ridges minerals Moho motion North observed oceanic crust P₁ palaeomagnetic Parasnis plate tectonics polarity pole potential Precambrian radioactive reflection refraction regional relative remanent magnetization resistivity rocks salt sea-floor spreading sedimentary sediments seismic velocities seismic waves seismology shown shows SI-units station structure studies surface surveys susceptibility temperature thermal thickness tion transform faults trenches upper mantle V₁ variations various vertical zones