704 



SUBJECT INDEX 



Structure, 208, 231 



of bedrock, relation of, to strength, 130 



relation of, to seismograph, 84 



sections of oil fields, 573 



slides due to, 135 

 Strukturboden, 256, 263 

 Subgrade problems, 141, 222, 639 

 Submarine canyon, 284 

 Submarine geology, 656 

 Submarine lavas, 507, 511, 517 

 Submarine ridges, effect of, on deposition 



of sediments, 11, 18 

 Submarine slumping, 22 

 Submarine springs, 17, 21 

 Submarine Supplements to the Sailing 



Directions, 661 

 Submarine topography, 661 

 Subsidence, 135, 138, 230, 233 



in shallow oil fields, 141 

 Subsoil, 58 



Subsoil exploration, 151, 203 

 Subsurface explorations in foundation 



studies, 152 

 Subsurface rock densities, 79 

 Subsurface techniques in petroleum ge- 

 ology, 559—578 

 Subways, 203 

 Sudbury, Ont., 528 

 Sullivan Mine, B. C, 529 

 Sulphates, 612 

 Sulphide, hydrogen, 21 



iron, 519 

 Sulphur, 138, 141, 491, 507, 515 

 Sulphuric acid, 619 



Sun spots, effect of, on permafrost, 261 

 Sundance Mountain, Wyo., 451 

 Supercapillary porosity, 618 

 Supersonic sounding equipment, 353 

 Surface activity of clay minerals, 109 

 Surface area, in permeability studies, 600 

 Surface creep, 66, 67 

 Surface failures, 144 

 Surface tension, 602 

 Surface texture, 401, 440, 442, 458, 571 

 Surface water, dissolved metals in, 544 

 Surfacing, airfield, 651 

 Surry Mt. Dam, 184 

 Surveys, reservoir-sedimentation, 351 

 Suspended load, 63, 381, 390 



sampling instruments for, 66 

 Suspension of clays in water, 468 



Susquehanna Bridge, Penn., 133 



Sveagruvan coal mine, 250 



Svenska Prospekterings Artiebolaget, 548 



Swamp deposits, 27 



Swampy ground, 27, 121, 128, 138, 141, 



517, 640 

 Sweden, 42 

 Swelling, 199 

 Swelling ground in tunnels, 197, 199, 



208 

 Switzerland, 204 

 Syngenetic sedimentary deposits, 485 



Talc, 530 



Talus, 120, 135, 451 



Talus creep, 230 



Tantalum concentrates, 488 



Telephone lines in permafrost areas, 258 



Telluride, Colo., 232 



Temperature, 5, 16, 17, 28, 254, 259, 267 



ocean, 18 



of perennially frozen ground, 251 

 Temperature distribution, 85 



effect of, on environment, 17 

 on soil, 49 



on velocity of sound in water, 357 

 Temperature gradients, in permafrost, 

 251 



in water, 657 

 Tennessee, 487, 525, 528 

 Tennessee River, 148, 157, 331, 347, 514 

 Tennessee Valley Authority, 331, 347 

 Tensile strength of soils, 153, 154, 193 

 Tension cracks, 137 

 Tensleep sand, 609 

 Terminal moraine, 204 

 Terminology, 31 s 62 



Terrace deposits, 25, 131, 211, 213, 340, 

 401, 637 



as source of aggregate, 447 

 Terrain appreciation, 635 

 Terrecettes, 256 

 Terrestrial deposits, 25 

 Terrestrial magnetism, 89, 92 

 Tertiary, 59, 121, 148, 164, 205, 239, 481, 



482, 506 

 Test pits, 173, 263 

 Tests, 172, 186 



boring, 203 



