INDEX
521
Turbidity currents,
formation of, 101-103
Turbulent flow, defined, 91
Uganda, laterites of, 33
Unconformities
in carbonates, 423-424
mineralization beneath, 434
porosity developed beneath,
in sandstones, 372-375
soils associated with, 34
types of, 283
Undoform, 222
Undothem, 222
Uranium ores,
alluvium in, 204
unconformity-related, 36-38,
volcanic origin of, 345
Vadose
pisoliths, 400
zone, 318
Varves, 107, 216
Vitrain, 429
Volcanic ash, 29, 337
Volcaniclastic sediments, ii, 344-345, 355,
436, Plate 3B
Volcanoes, sand, 165 -166
Wackestone, 404, Plates 6B & 7E
Walther's Law, 228, 279-280
Water,
connate, 318-319
juvenile, 318-319
meteoric, 36, 318-320
thermobaric, 319
Water table, 36-37, 319, 425-426
Waulsortian reefs, 259-260
Wave
ripples, 100-101
sediment transport by, 240-243
Wave base,
effective, 100, 241,247
fair weather, 152
storm, 152
Weathering, 22, 468
biological, 25-27
chemical, 30-32
physical, 29-30
Wentworth grade scale, 44-45
Whaleback dune, 112
Whitings, 401
Wild-flysch, 123
Witwatersrand reef, 12, 205-206
Wyoming, uranium ores of, 37,204
Yukon, alluvial gold deposits of, 12
Zambia, copper belt of, 13
Zechstein, evaporites of, 442-443,543
Zoophycus, 134