978 



SUBJECT INDEX 



Geophysical exploration (cont'd) : 



- in mining (see also Mining explora- 



tion), 6, 8, 49-56 



- in oil (see also Oil exploration), 5, 8, 



43-48 

 Geophysical mapping, 41 

 Geophysical methods, classification of, 



7-9 

 Geophysical orientation, 44 

 Geophysical prospecting (see Geophysi- 



po I fiXDiorSitioii ) 

 Geophysical science, 3, 4, 70, 296, 440, 623 

 Geophysical'sounding, 41 

 Geophysics, derivation of word, 3 

 Geoscope, 725 

 Geothermal gradient (see Gradient, 



geothermal) 

 Geothermal investigations (see Tem- 

 perature measurements in wells) 

 Geothermal methods, 840-845 

 Gilbert (unit), 297, 298 

 Gimbal suspension, 102, 103, 110, 352 

 Gish-Rooney method, 28, 645, 660, 661, 

 664, 709, 710, 712, 715, 720, 723-725, 

 758 

 Glacial drift, 415, 703, 741, 756, 757 

 longitudinal wave velocity of -, 469 

 resistivity of -, 661, 664 

 specific acoustic resistance of -, 479 

 Glaciation, effect on earth's tempera- 

 tures, 853, 855, 856 

 effect on gravity of -, 165 

 Glaciers, 814, 815 

 Glass, damping resistance of, 482 

 Glauberite, density of, 78 

 Glow tube, 116, 497 

 Gneiss: 

 density of -, 81 

 dielectric constant of -, 666 

 elastic moduli of -, 467 



- formation, 271, 284, 288, 409, 430, 



678, 679 

 heat conductivity of -, 849 

 longitudinal wave velocity of -, 472 

 radioactivity of -, 874 

 specific heat of -, 848 

 susceptibility of -, 312 

 Gold, 5, 8, 50, 51, 73, 297, 419, 704 

 -conglomerate, 50, 51, 419 

 density of -, 77 

 direct location of -, 5 



- quartz, 29, 50, 52, 624, 754-756 

 Gossan, 27, 629-630, 668, 669 

 Gradient: 



- and curvature variometer, 13, 175-184 

 geothermal -, 844-847, 850-854, 860 

 horizontal -, of gravity (see Gravity 



gradient) 

 magnetic -, 363, 380, 406, 407 

 regional -, 240, 241, 246, 251, 262, 281 

 vertical -, of gravity, 70, 136, 169, 



190-192, 394 



Gradiometer : 

 magnetic -, 40, 363, 364, 380 

 torsion balance -, 184-192, 380 

 vertical -, 190-192 



Grain packing and porosity, 634-637 



Graneros shale, 84 



Granite: 



- building stone, 435 



coercive force and remanent mag- 

 netization of -, 316 

 density of -, 73, 75, 76, 81 

 dielectric constant of -, 666 

 elastic moduli of -, 467 



- formation, 430, 502, 677, 678, 703, 742 

 heat conductivity of -, 849 

 longitudinal wave velocity of -, 472 

 radioactivity of -, 874 



Rayleigh wave velocity of -, 473 

 resistivity of -, 660, 661 



- ridge, 8, 18, 45, 47, 161, 284, 429-431 

 specific heat of -, 848 

 susceptibility of -, 313, 

 transverse wave velocity of -, 472 



Granodiorite, longitudinal wave velocity 



of, 472 

 Granulite, density of, 81 

 Graphical correction methods, 138-140, 



226-236, 243, 559 

 Graphical interpretation methods, 144, 



153-154, 253, 256, 265-268, 389, 400, 



536-539, 729-733, 768-769, 793-795 

 Graphical representation of data (see 



Plotting) 

 Graphite : 



density of -, 79 



- deposits, 55, 756 



heat conductivity of -, 848 



- impregnations, 623 

 resistivity of -, 632, 657, 659 

 spontaneous polarization of -, 668, 



678, 680 

 susceptibility of -, 310 

 Graticule (correction and interpretation 

 diagram), 138, 139, 153, 154, 229- 

 234, 265-267, 400, 769 

 Grating (see Graticule) 

 Gravel : 

 density of -, 838 



- deposits (see also Placer deposits), 



54, 277, 416, 417, 421, 439, 501-502, 

 733, 735, 742, 743 



- pits, 377 



Rayleigh wave velocity of -, 473 

 resistivity of -, 664 

 water -, 743, 744 

 Gravimeter, 8-12, 39, 40, 43, 46-48, 53-55, 

 67, 70, 71, 123-137, 161, 162, 274, 580 

 Askania -, 126 

 astatic -, 127-134 

 bifilar-, 130, 131 

 Boliden -, 125 

 calibration of -, 133-135 

 drift of -, 135 



