684 



SUBJECT INDEX 



Cost, of harbor control, 300, 309 



of silt removal from irrigation canals, 

 370, 374 



of soil erosion, 390 



of tunnel construction, 193 

 Cottage Grove Dam, 189 

 Coulomb's equation, 103, 155, 239 

 Creep, 14, 47, 135, 230 

 Cretaceous, 148, 199, 235, 482, 514 

 Crevasses, 216 

 Cribbing, 243 

 Cristobalite, 56, 462 

 Critical bottom velocity, 70 

 Critical circle instability analyses, 104, 



138 

 Critical tractive force, 69 

 Cross-bedding, 11-13, 22, 25, 29, 160 

 Crowley's Ridge, 211 

 Crushed rock, 639, 647 

 Cryopedology, 248 

 Cryoplanation, 255 

 Cubanism, 513 

 Cuesta faces, 386 

 Cumberland County, Pa., 130 

 Cumberland River, 330 

 Cumulative curve, 477 

 Currents, 7, 19, 23, 297, 661 



longshore, 11, 19, 22, 25 



velocities of, 306 

 Curricula in engineering geology, 170 

 Cut-and-cover conduit, 182 

 Cut-and-fill action, 25 

 Cuts, highway, 133 

 Cuyuna, Minn., 514 

 Cyclic sediments, 164 



D 



Dio, 196 



£> 50 , 32 



#65, 69 



Dacites, 444, 462 



Dallas, Tex., 72 



Damaging effects of flood, 395 



Dams, 96, 292, 319, 362 



earth, 181-192 



effect of, on permafrost, 258 



foundation, 148, 149 



on insoluble rocks, 150 

 Dam site, selection of, 181 

 Darcy's law, 114, 588 



Davis Dam, 443 

 Dayton, Ohio, 119 

 Deaver Canal, 375 

 Debris, 230, 326-346 



transportation of, 8 

 Debris avalanche, 135, 230 

 Debris fall, 230 

 Decolorizing oils, 472 

 Deep-sea sediments, 19-24 

 Deepwater Point Range, 305 

 Deese formation, 599 

 Deforestation, 395 

 Deformation, 479 



of mineral constituents, 30 



problems of, 96 

 Degradation, 36, 393, 418, 432 

 Degree, of saturation, 15, 191 



of sorting, 10 

 Delaware Canal, 305, 306 

 Deltas, 11, 25, 27, 129, 131, 211, 213, 216 

 Deming, N. M., 420 

 Density, 18, 85, 172, 233, 240, 359, 611 



rock, subsurface, 79 



sand, 223 



sea- water, 18 



sediment, 359 



shale, 612 



soil, 129 

 Denver, Colo., 229, 437 

 Denver and Rio Grande Western Rail- 

 road, 237 

 Department of the Army, 181, 336 

 Depergelation, 251 

 Deposition, 9 

 Depositional cycles, 432 

 Deposits, 3-40; see also Sediments 



iron, 31, 506-523 

 Depth, of burial of clays, 94, 147 



of overburden, 147 

 Depth functions in soils, 44 

 Desert, ground water in, 119 

 Desert deposits, 26 

 Desilting basins, 370 

 Development of mineral deposits, 84, 499 

 Devonian, 516, 599, 624, 626, 628 

 Dewey Dam, Utah, 447 

 Diagenesis, 10, 29 

 Diamond, 489, 513 

 Diamond drilling, 152, 629 

 Diaspore, 56 

 Diastrophism, 10-18, 620 



