SUBJECT INDEX 



699 



Rate, of settling, 295 



of soil formation, 43 



of transport, 63, 67 

 Raveling ground in tunnels, 194, 200, 202 

 Reach of river channel, 181 

 Recent alluvium, 211, 481 

 Recent foraminifera, 662 

 Recent sediments, 3 

 Reclamation of arid land, 390 

 Red River, Tex., 325, 382 

 Red soils, 58 

 Redbank, Alberta, 560 

 Reduction, of ferrous sulphate, 509 



state of, 21 

 Reefs, coral, 24, 560 

 Reflection, of underwater sound, 660 



seismograph, 78 

 Reforestation, 401 



Refraction seismic equipment, 79, 173 

 Refractoriness of clays, 478 

 Refrigerating soils in permafrost area, 



265, 268 

 Regional uplift, 418 

 Relative permeability, 590 

 Release of load, effect of, 147 

 Remolded clay, 221, 235 

 Replacement deposits, 485-505, 528 

 Repose, angles of, 12 

 Repressuring of reservoirs, 585, 616 

 Republican River, Neb., 382 

 Research, on beach erosion, 288 



on carbonate porosity, 622 



on concrete aggregates, 457 



on debris control, 345 



on geochemical prospecting, 549 



on geophysics, 87 



on gullying, 432 



on highway construction, 144 



on iron deposits, 521 



on irrigation canals, 376 



on landslides, 243 



on permafrost, 269 



on sedimentary minerals, 500 



on sedimentation, in naval operations, 

 660-662 

 in reservoirs, 362 



on soft-ground tunnels, 208 



on soil erosion, 402 

 Reserves of ore, method of computing, 



497 

 Reservoirs, 64, 347-363, 393 



Reservoirs, capacity of, 396 



in carbonate rocks, 617 



in permafrost areas, 258 



of petroleum, 603 



silting in, 347, 396 



surveys of sedimentation in, 351 

 Residual concentrations of ore minerals, 



524 

 Residual deposits of iron, 512, 515 

 Residual soils, 129, 538 

 Residual tractive force, 70 

 Residual weathering products, 539 

 Resisting moment in slides, 103, 139, 243 

 Resistivity logs, 563 

 Resistivity measurements, 81 

 Resistivity surveys, 130, 140 

 Retaining walls, 149, 243 

 Reverberation in the sea, 657, 659 

 Reversible loadings, 147 

 Revetment of stream banks, 222, 319, 332 

 Rhine River, 64, 122 

 Rhodesian copper, 529 

 Rhodium, 488 

 Rhone River, 108 

 Rhyolite, 442, 444, 451, 462 

 Richmond, Va., 293 

 Rigidity of soils, 95 

 Ring test of strength of rocks, 154 

 Rio Grande, N. M., 65, 324, 333, 382, 



392, 393 

 Rio Puerco, 392, 411, 413, 415 

 Rio Tinto, Spain, 515, 529 

 Ripple marks, 22, 69, 515 

 Riprap, 189, 190, 319, 490, 649 

 River deposits, 25, 202, 207, 445 

 River harbors, 291 



River terrace deposits as aggregates, 447 

 River waters, iron content of, 508 

 Rivers, 21, 49 

 Riverside, Calif., 420 

 Roads, military, 639, 652 

 Rock, abrasion of, 6 



densities of subsurface, 79 



effect of, on dam foundations, 161 



use of, in military geology, 638-641 

 Rock creep, 230 

 Rock-fill dam, 182 

 Rock flour, 12, 204 

 Rock glacier, 135 

 Rock Island, 328 

 Rock River, 119 



