

960 



SUBJECT INDEX 



Siberia, 919 



Siberia Abyssal Plain, 327 



Sicilian Channel, 644 



Sierra Leone Abyssal Plain, 321 



Sigsbee Deep and Abyssal Plain, 328 ff, 



493, 500, 754, 838 ff 

 Silicates, 692 ff 



Silicoflagellates, 692, 868, 871, 879 

 Silicon, 677 



Simpson's theory of glacial-age tempera- 

 tures, 918 

 Single-ship seismic refraction shooting, 39 

 Skado Trough, 404 

 Skagerrak, 284 

 Skate submarine vessel, 327 

 Skeletal particles, 554 ff, 560 ff, 570 ff 

 Slikke, 621 

 Slumping, 832 



von Smoluchovsky's theory, 656 

 Snell's Law, 548 

 Society Islands, 267, 366 ff 

 Socony Marine Seismic System, 51 

 Sohm Abyssal Plain, 315 ff, 338 ff, 351 ff, 



360, 746 

 Solomon Islands, 124, 414, 424 

 Somali coast, 327, 395 

 Sonoprobe, 49 

 Sono-radio buoys, 39 ff. 94 

 Sounding of trenches, 415 

 Sound sources, 49, 52 

 Sound velocity discontinuity, 718 

 South American trench, 228 ff, 231. 251 

 South Atlantic {see also under Mid-Oceanic 



Ridge), 257, 321 ff, 336 

 South Florida major environments, 563 ff 

 South Pacific {see also under Mid-oceanic 



Ridge), 257, 266, 270, 273, 689, 697, 



704, 731 ff, 735, 739, 770, 873 

 South Sandwich Trench, 411 ff 

 Space vehicles being sterilized, 846 

 Sparker, 59 



Spark sound source, 49 

 Spencer F. Baird R.V., 419 

 Spinel, 669 



Spitsbergen, 288, 304 ff, 399 ff, 402 if 

 Sponges, 459, 692, 875 

 Spontaneous generation of life, anciently 



supposed, 833 

 Spontaneous liquefaction hypothesis for 



cable breakage, 750 

 Spumellaria, 875 

 Starfish, 446, 459 

 Stranger R.V„ 416, 421 

 Strecker synthesis, 354 



Strike-slip faults, 404, 407. 413, 424, 432 

 Strontium, 667, 677, 688, 708 

 Subarctic Convergence, 692 

 Sub-bottom reflections, 80 ff, 769 ff 

 Submarine cables and their failures, 411, 



497, 744 ff, 759 

 Submarine canyons, 243 ff, 326, 337 ff, 480, 

 742 

 Corsican and Riviera types, 488, 492, 501 ff 

 delta foreset-slope gullies, 494 ff, 500 

 descriptions, 481 ff 

 microtopography, 469 

 New England t\Y>e, 492 ff 

 origin, 496 ff 

 Pleistocene cutting by turbidity currents, 



504 

 shallow straight-walled valleys of escarp- 

 ments, 496 

 subaerial erosion, 500 ff 

 tectonic and delta-front troughs, 493 ff 

 turbidity currents as a cause, 496 ff, 499 ff 

 Submarine landslides, 743 

 Submarine rocks, 192 ff 

 Submarine valleys classification, 480 ff 

 Sub-oceanic structural exploration by seismic 

 waves, 110 

 Airy phase, 125 



body waves, shear and compressional. 111 

 crustal waves, 121 ff 

 dispersion curves, 113 ff 

 "G-waves", 119 

 group velocity, 112 

 Love waves. 111 ff {see also within each 



section of this chapter) 

 low-velocity layer or zone, 111, 119 

 mantle waves, 117 ff 

 mud layer to explain short -period data, 



128 

 phase and group velocity, 112 

 Rayleigh waves, 1 1 1 ff {see also within 



each section of this chapter) 

 seismic surface waves, general nature of, 



lllff 

 seismograms as affected by excitation and 



propagation, 111 

 shear modes of Rayleigh waves, 115 ff 

 short-period, 126 

 T-phase, 131 

 tsunamis, 131 

 Sulfate in sediments, 607 ff, 613 

 Sulfur, 603, 606 ff 

 Sunda Shelf, 282 



Siui's total radiation averaged over the 

 Earth, 852 



