702 



SUBJECT INDEX 



Shoaling in harbors, 291, 295, 300, 305 



Shore, 207 



Shore-control problems, 276-290 



Shore-line harbors, 296 



Shore-line trends, 573 



Shore problems, in military geology, 640 



in naval warfare, 659 

 Shore processes, 23, 276-290, 662 

 Shoshone project, Wyo., 375 

 Shrimp noises, 657 

 Shrinkage, drying, 107, 469 

 Siberia, 250 



Side-channel spillways, 183, 184 

 Side slopes, 134; see also Stability 

 Siderite, 513, 518 

 Sierra Nevada, 333, 424 

 Sieve tests, 100, 477 

 Sikeston, Mo., 213 

 Silesian lead-zinc, 529 

 Silica, 17, 21, 160, 507, 609 



colloidal, 58 

 Silica-alumina ratio, 51, 56, 59 

 Silica-saturated ground waters, 629 

 Silica Pool, Kan., 625 

 Silicates, 535 T 624 



iron, 520 

 Siliceous deposits, 31, 131, 481, 535 

 Silicification, 465 

 Sill, depth of, 21 

 Silurian, 514, 516 

 Silt, 31, 216, 219, 221 

 Silting, 216, 398, 417 



in irrigation canals, 36, 347, 363-379 



in reservoirs, 68, 347-363, 397 

 Siltstones, 33, 131, 159, 161, 457 

 Silver, 488, 491, 542 



veins of, 528 

 Silver City, N. M., 420, 422 

 Single-core displacement cell, 594 

 Sinkholes, 140, 638 

 Sioux City, Iowa, 331 

 Size distribution, 10, 23, 99, 231, 240, 

 256, 606, 659 



of pores, 617 

 Skewness, 11, 72 

 Skin friction, 177 

 Slag, furnace, 140, 492 

 Slate, 561 

 Slides, 135, 149, 229-246, 265 



involving artificial fills, 135 

 Sliding wedges, 224 



Slip plane, 136 

 Slope, 47 



of levees, 223 



protection, 190 



relation of, to military geology, 643 

 Slope-adjustment slides, 135 

 Slope stability, 96, 102-104, 132, 136, 



137, 190, 224 

 Sloughing of bank, 369 

 Slow flowage, 135 



Slowly raveling ground in tunnels, 194 

 Sluicing of silt from reservoirs, 361 

 Slumps, 135, 157, 229-246, 383; see also 

 Failure, Slides 



submarine, 22 

 Smackover Pool, Ark., 605 

 Small-scale adjustment slides, 135 

 Snogeback, Denmark, 297 

 Soda ash, 468 

 Sodding, 242 



Sodium compounds, 458, 492, 509 

 Sofar network for location, 663 

 Soft-ground tunneling, 193-209 

 Soil, 41 



agricultural, 5, 41, 61, 129, 413, 544 



analysis of, 42, 49, 99, 544 



classification of, 31, 33, 47, 60 



conservation of, 380-406 



definition of, 93 



erosion of, 36, 284, 320, 327, 338, 348, 

 364, 380-406, 407-436 



evolution of, 45, 76 



function of, 42, 129 



in engineering sense, 93, 128, 220 



in permafrost areas, 255 



nitrogen in, 50 



organic matter in, 54 



origin of, 41-61 



properties of, 42, 96, 255 



residual, 129 

 Soil Conservation Service, 380, 388, 431 

 Soil creep, 14, 47, 230, 383 

 Soil engineers, 181 

 Soil formations, 4, 41, 61 

 Soil horizons, 41 



Soil map in military geology, 636 

 Soil mechanics, 75, 93-112, 181, 229 



definition of, 94 



relation of, to geology, 107 

 to geophysics, 82 

 Soil profile, 41 



