SUBJECT INDEX 



961 



Surf zone, definition, 529 



Swallow Bank, 444 



Swash zone, definition, 529 



Sweden, 292 



Swedish Deep-Sea Expedition, 1947-8, 36, 



341,674,823,911 

 Sylvania Guyot, 380, 383 

 Syria, 901 



Tadjoura, 395 



Tafelneh, 288 



Tagus Abyssal Plain, 320 



Talus continental, 290 



Tasmania, 395, 398 



"Tectogene", 412, 426 



Tectonic features of the Earth, 407 



Tehuantepec Ridge, 262, 423 ff 



Television : see Underwater television 



Temperatures 



bottom water, 917 

 Cenozoic, from fossils, 900 

 gradient in ocean floor, 218 

 Miocene, 911 

 Oligocene, 911 



Pleistocene, 896 ff, 900 ff, 911 

 Pliocene, 911 

 probe, 218 ff 

 Terrestrial organic detritus, 708 

 Terrigenous sediment, 507, 655 ff, 659, 



669 

 Tertiary sediments : see under Pelagic sedi- 

 ments 

 Tethys Expedition. 679 

 Texas, 205, 286, 607, 628, 634, 640 

 Thanatocoenoses, 877 

 Thermal conductivity of ocean floor, 218 

 Thermal energy synthesizing organic com- 

 pounds, 856 

 Thermistor, 218 ff 

 Thermocline, 18 

 Thermocoviple, 218 

 Theta Abyssal Gap, 257, 320, 343 

 Theys, 632 

 Thorium and its radio-isotopes, 667 ff, 817, 



821, 900, 916 

 Tidal marshes, 621 ff 



Time-distance graph : see under Seismic re- 

 fraction and reflection 

 Timms Point silt, 903 

 Timor, 412 

 Tiran Island, 304 

 Titanium, 667, 670, 688 

 Tobago, 641 

 Tokyo Bay and Canyon, 491, 501 



Tonga Trench, 210 ff, 214, 251 ff. 368, 



412 ff, 419 ff, 427, 431 ff 

 Topography of the deep-sea floor, 233 {see 

 also geographical references between this 

 and 276) 

 abyssal cones, 249 ff 

 abyssal floor, 253 ff 

 abyssal gaps, 257 

 abyssal hills, 256 ff 

 abyssal plains, 254 ff 

 aseismic ridges, 264 ff 

 continental margins, 237 ff 

 continental rise, 248 ff 

 continental shelf, 240 ff 

 crest provinces, 271 ff 

 fans, 249 ff 



flank provinces, 273 ff 

 fracture zones, 260 ff 

 highs, 721 

 island arcs, 250 ff 

 linear archipelagos, 265 ff 

 marginal plateaus, 245 ff 

 mid-oceanic canyons, 257 ff 

 mid-oceanic plateaus, 267 ff 

 mid-oceanic ridge, 270 ff 

 minor lineations, 263 ff 

 morphologic divisions, 235 ff 

 ocean-basin floors, 253 ff 

 outline of chapter, 235 ff 

 physiographic features, 235 

 seamounts and groups, 265 ff, 275 

 shelf break, 241 ff 

 submarine canyons, 237, 243 ff 

 summary of forms, 277 ff 

 tectonic activity of ocean-basin floor, 

 269 ff 

 Trade winds variation effects, 716 

 Transportation and erosion in deep sea, 764 ff 

 Transport of sediments, 742 

 Trenches, 210 ff, 411 

 bottoms, 418, 422 

 continental border structures, 414 

 earthquakes, 412 ff, 422 ff, 431 ff 

 extension hypothesis, 429 ff 

 gravity exploration, 412 

 heat flow through floors, 413 

 laboratory experiments, 426 

 mantle convection hypothesis. 430 ff 

 maximimi reported depths, 418 

 negative isostatic and gravity anomalies, 



411, 426, 429 

 plastic deformation of crust, 412 

 postulated mechanical situation for 

 crustal movement, 431 



