Platykurtic, 51
Playa lakes, 218-220
Pock marks, 166 -167
Poikilitic, 363, Plate 4A
Poikiloblastic, 363, Plate 4A
Point bar, 198
Porosity
biomoldic, 70, Plates 1D & 4E
of carbonates, 423-424
cavernous, 70
classified, 65-66
of clays, 339-340
defined, 57
effective, 58
fenestral, 67-68
fracture, 70-72, Plate 1F
gradients
intercrystalline, 67, Plate 1C & 7F
intragranular, 66-67, Plate 1B
measured, 60-62
moldic, 70, Plates 1D & 4E
primary, 66-67, Plate 1A
of sands, 357-360
secondary, 67, 372-379, Plates 1D, 1E
& 4D
texture, relation to, 73-75
total, 62
vuggy, 70, Plate 1E
Potash salts, 440-442, 453-455
Potentiometric surface, 313-314
Pressure,
fluid, 313-314
over, 313-314
Pressure solution
carbonate in, 414
sandstones in, 367, Plate 4C
Pseudonodules, 159,
Pteropods, 273
Ptygmatic structure, 164-165
Pumice, Frontispiece, 344
Pyramidal dune, 109
Pyrite, 376, 394
Pyroclastic sediments, 344-345
Quartz, hydraulic ratio of, 90
Quartz cement, 366-367, Plates 4B, 4C
& 4F
Quartz wacke, 355,356, Plate 3F
Quartzite, 352-353, Plate 3C
Quicksand structures, 158-159
Radiolaria, 273-274, 457
Rain prints, 162
Rammelsberg sulfide deposits, 277
Ramp, carbonate, 247, Plate 8
INDEX
519
Rank, of coal, 427
Recrystallization, defined, 408-409
Recumbent cross-bedding, 158
Red beds, 345,354, 376
Red clay, 274
Reefs
ancient, 256-261, Plate 6E
mineralization of,
modern, 250-256
petroleum in, 260-264
terminology of, 249-252
Relict sediments, 242
Repichnia, 134
Reservoir, continuity of, 80-82
Reynolds equation, 91
Rhizoconcretion, 27-28
Rhizocorallium, 134
Rib and furrow, 156
Rift-drift basins, 491-497
Rimmed, carbonate model, 247, Plate 8
Rio Tinto, 36-37
Ripple index, 154
Ripple marks, 152-157
Ripples, 95,152-157
"Roll-front" uranium ores, 37-38
Rotliegende, eolian deposits of, 210-213
Roundness, particles of, 42-43
Sabellarifex, 134
Sabkha,
defined, 247
described, 449-455
evaporites in, 449-443
oil shales in, 218
primary dolomite in, 420-421, 451-452
Sag basins, 476-486
Sahara desert, 113,211
Salinity, connate fluids of, 321-323,
Salt pseudomorphs, 162
Saltation, defined, 92
Sand, surface texture of, 41-42
Sand dikes, 165
Sand volcanoes, 161,165-166
Sand waves,
carbonate, 248, 251
sand, 243
Sandstone
classification, 345-352
description, 352-356
diagenesis, 356-381
Sapropelite, 333-334
Sarir surface, 208, 212
Saudi Arabia, 70, 425,450
Scanning electron microscope, 41,369, 417
Scolithos, 134
Playa lakes, 218-220
Pock marks, 166 -167
Poikilitic, 363, Plate 4A
Poikiloblastic, 363, Plate 4A
Point bar, 198
Porosity
biomoldic, 70, Plates 1D & 4E
of carbonates, 423-424
cavernous, 70
classified, 65-66
of clays, 339-340
defined, 57
effective, 58
fenestral, 67-68
fracture, 70-72, Plate 1F
gradients
intercrystalline, 67, Plate 1C & 7F
intragranular, 66-67, Plate 1B
measured, 60-62
moldic, 70, Plates 1D & 4E
primary, 66-67, Plate 1A
of sands, 357-360
secondary, 67, 372-379, Plates 1D, 1E
& 4D
texture, relation to, 73-75
total, 62
vuggy, 70, Plate 1E
Potash salts, 440-442, 453-455
Potentiometric surface, 313-314
Pressure,
fluid, 313-314
over, 313-314
Pressure solution
carbonate in, 414
sandstones in, 367, Plate 4C
Pseudonodules, 159,
Pteropods, 273
Ptygmatic structure, 164-165
Pumice, Frontispiece, 344
Pyramidal dune, 109
Pyrite, 376, 394
Pyroclastic sediments, 344-345
Quartz, hydraulic ratio of, 90
Quartz cement, 366-367, Plates 4B, 4C
& 4F
Quartz wacke, 355,356, Plate 3F
Quartzite, 352-353, Plate 3C
Quicksand structures, 158-159
Radiolaria, 273-274, 457
Rain prints, 162
Rammelsberg sulfide deposits, 277
Ramp, carbonate, 247, Plate 8
INDEX
519
Rank, of coal, 427
Recrystallization, defined, 408-409
Recumbent cross-bedding, 158
Red beds, 345,354, 376
Red clay, 274
Reefs
ancient, 256-261, Plate 6E
mineralization of,
modern, 250-256
petroleum in, 260-264
terminology of, 249-252
Relict sediments, 242
Repichnia, 134
Reservoir, continuity of, 80-82
Reynolds equation, 91
Rhizoconcretion, 27-28
Rhizocorallium, 134
Rib and furrow, 156
Rift-drift basins, 491-497
Rimmed, carbonate model, 247, Plate 8
Rio Tinto, 36-37
Ripple index, 154
Ripple marks, 152-157
Ripples, 95,152-157
"Roll-front" uranium ores, 37-38
Rotliegende, eolian deposits of, 210-213
Roundness, particles of, 42-43
Sabellarifex, 134
Sabkha,
defined, 247
described, 449-455
evaporites in, 449-443
oil shales in, 218
primary dolomite in, 420-421, 451-452
Sag basins, 476-486
Sahara desert, 113,211
Salinity, connate fluids of, 321-323,
Salt pseudomorphs, 162
Saltation, defined, 92
Sand, surface texture of, 41-42
Sand dikes, 165
Sand volcanoes, 161,165-166
Sand waves,
carbonate, 248, 251
sand, 243
Sandstone
classification, 345-352
description, 352-356
diagenesis, 356-381
Sapropelite, 333-334
Sarir surface, 208, 212
Saudi Arabia, 70, 425,450
Scanning electron microscope, 41,369, 417
Scolithos, 134