Resumen: |
Introduction.- Origin of the esrth.- Origin of the moon.- Gechronology.- Temperature of the earth.- Se ismic waves.- Observational seismology.- Cause of earthquaker.- Instrumental seismology.- Transmission of seismic waves.- Data derive from seismology.- Muss, moment, shape, and sizc of the earth.- Density and elastic constants.- Continental drift.- Tectonic patterns typical tectonic profiles.- Cause of mountain building.- Geomagnetism.- Terrestrial electricity.- Geomagnetic and geoelectric instruments |