SUBJECT INDEX 



953 



Layers, seismic, 7, 12 ff, 83, 85 ff (see also 



under Crustal rocks) 

 Lead, 667 ff, 677, 680, 688 

 Leffe, 894, 897 

 Leman: see Geneva, Lake of 

 Lena delta, 404, 620, 633 

 Life : see Origin of Life 

 Lift faulting, 754 

 Lignins, 598 



Line Islands, 275, 367, 383 

 Lipids, 596 

 Lithiophorite, 663 



Littoral processes of sedimentation, 529 

 Loess, 892, 895 

 Lofoten, 289 

 Loire estuary and submarine delta, 620, 



627, 637 

 Lomonosov Ridge, 265, 327, 372, 402 

 Long Island Sound, 55 ff 

 Longshore current and sand movement, 



547 ff 

 Longuet-Higgins theory of bed drag, 



523 ff 

 Lorraine, 297 



Los Angeles Basin, 590, 609, 903 

 Louisiana, 205, 286, 296 ff, 299, 607, 628, 



632, 640 

 Lousy Bank, 282 

 Love-wave dispersion, 808 

 Lowestoft strata, 893 

 Lutite, 754 



Liitzow-Holm Bay, 289 

 LjTin Canal, 399 

 Lyons, Gulf of, 489, 503 



Mackenzie River, 633 

 Macquarie Island, 395, 398 

 Madagascar, 265, 281, 327, 623, 628, 633 

 Madeira, 62, 164, 206, 320, 353, 356, 443, 



448, 453 ff, 458, 461 

 INIagdalena river and submarine canyon, 



256, 331, 758 ff, 760 

 Maghemite, 193, 677 

 Magnetic field over the oceans, The, 175 



abyssal plains, 355 



aircraft surveys, 177 



anomaly maps, 194 ff, 200, 204 



continental shelves, 203 ff 



deep trenches, 210 ff 



discontinuity at Curie point isotherm 

 depth, 193 



fluxgate magnetometer, 179 ff 



helium magnetometer, 182 



historical, 175 ff 



Magnetic field over the oceans. The — con- 

 tinued 



igneous rocks, permanent or remanent 

 magnetization, 192 



magnetic storm effects, 190 ff 



measurements at sea, 177 ff 



mid-ocean ridges, 206 ff 



northeast Pacific surveys, 193 ff 



non-magnetic ship surveys, 177 



power spectrum and space spectrum, 1 87 



Project "Magnet", 177 ff, 191 



proton magnetometer, 179 ff, 182 ff 



reduction of observations, 190 ff 



regional trend, 191 



rubidium vapor magnetometer, 182 



seamounts, 206 ff 



secular variation, 190 



submarine rocks, 192 ff 



susceptibility, 192 



temperature effects, 193 



total force measurement, 177 



U.S. west coast survey, 194 ff 



variations, 190 ff 

 Magnetic spherules, 675 

 Magnetite, 675 

 Mahabis R.V., 394 

 Mahavati delta, 633 

 Maine, Gulf of, 48, 286, 292, 295 

 Malagassy Abyssal Plain, 327 

 Malaya, 624 

 Maldive Islands, 377 

 Malo Jezero, 588 



Manganese nodules, 445, 507, 665 ff, 670 ff 

 Manganese oxides, 659, 663, 680 

 Mantle rocks. The, 103 



compressional and shear-wave velocities 

 and Poisson's ratio, 106 ff 



compressional- wave measvirements, 103 ff 



convection current hypothesis, 430 ff 



crustal thicknesses as function of sea- 

 floor elevation, 108 



degassing, 888 



depths of M discontinviities under oceans 

 and continents, 104 



shear- wave measurements, 105 ff 



sub-crustal velocities vs. number of ob- 

 servations, 105 



summary of chapter, 107 ff 



surface waves, 117 ff 

 Maracaibo Lake, 584 ff, 590 ff 

 Marcus-Necker rise, 276, 382 

 Marginal plateaus and escarpments, 245 ff, 



281 

 Marianas Islands, 251, 366 



