230
Norwich crag, 256, 257
Nummulitic limestone, 248


Old red sandstone, 183, 185, 186, 188, 191
Oldham, R. D., 208
Oldhaven beds, 244, 245
Olenellus fauna, 134, 153, 156-160
Olenus fauna, 152, 161, 162
Oligocene beds, 251, 252
Oligocene fauna and flora, 252
Oolite, 226
Ordovician faunas, 172, 173
Ordovician system, 164-173
Organically formed rocks, 29, 102, 109
Orogenic movements, 32
Osborne beds, 257
Owen, Sir R., 277
Oxford clay, 232
Oxford oolite, 226
Oxfordian series, 227, 232


Palæolithic fauna and flora, 270-274
Palæolithic man, 268, 272-274
Palæolithic period, 267-274
Palæontological break, 61
Palæo-physiography, 120
Paradoxides fauna, 152, 160, 161
Peat deposits, 275, 276
Pebble beds of Bunter, 218
Pebidian rocks, 140
Pengelly, W., 270
Pennant stage, 192
Pennine system of folds, 203
Penrith sandstone, 75, 210, 211
Period, definition of, 60
Permanence of ocean basins, 278-285
Permian fauna and flora, 214-216
Permian system, 209-217
Permo-carboniferous fauna and flora, 207, 208
Permo-carboniferous glacial deposits, 206
Permo-carboniferous period, 205-208
Phillips, J., 10, 11, 201
Physical break, 60
Pickwell Down sandstone, 183
Pilton beds, 183
Plaisancean series, 256
Planes of lamination, 27
Planes of stratification, 27
Pleistocene fauna and flora, 265, 266
Pleistocene period, 260-266
Pliocene fauna and flora, 259
Pliocene period, 256-259
Portland oolites, 226
Portlandian series, 226, 232
Prado, C. de, 161
Precambrian rocks, 132;
mode of formation of, 146
Preller, C. S. du R., 264
Prestwich, Sir J., 19, 130, 279
Productus limestones, 205, 206, 214
Protolenus fauna, 160
Pseudo-stromatism, 76
Purbeckian series, 226, 232
Pyroclastic rocks, 24


Quader sandstone, 240


Ramsay, Sir A. C., 130, 153, 163, 188
Reading beds, 244
Recurrences, 292
Red crag, 256, 257
Reid, C., 45, 257, 264, 268, 271
Renard, A., 30
Reversed fault, 34
Rhætic beds, 218
Rhiwlas limestone, 167
Richthofen, Baron von, 267, 268
Ridley, H. N., 271
River drift man, 268
Rotherham red rock, 202
Rothliegende, 209
Rouelle, 13


St Bees sandstone, 210
St Erth beds, 257
Salopian beds, 175
Salter, J. W., 161, 162, 186
Scarbro' limestone, 230, 231
Schists, crystalline, 76, 77, 133, 147
Scilla, A., 13
Screes, 101
Scrope, G. P., 76
Sections, geological, 84;
use of, 88
Sedimentary rocks, 23
Sedgwick, A., 16, 19, 20, 153, 174
Senonian series, 236
Series, definition of, 60
Seward, A. C., 113, 208
Sigmoidal structure, 33
Siliceous rocks, 29
Silurian faunas, 179, 180
Silurian system, 174-182
Simulation of structures, 72
Sinemurian series, 227, 229
Smith, W., 8, 12-18, 57, 85
Soil, 100
Solenhofen slate, 234
Sollas, W. J., 288
Solva beds, 152, 154, 156, 161
Speckled sandstone, 205, 206
Speeton series, 238
Spencer, H., 50
Spirorbis limestone, 201
Stages, definition of, 60
Steppe period, 260, 267-274
Stonesfield slate, 231
Strachey, J., 10
Strahan, A., 239, 264
Strata, 27;
classification of, 58, 125
Stratification, 26
Stratified rocks, 23;
composition of, 28;
origin of, 29;
classification of, 28, 125;
symbols to represent, 90
Stratigraphical geology, aim of, 1;
W. Smith, founder of, 8, 12-18
Suess, E., 110, 123, 207, 284
Superposition, law of, 31
Surveying, geological, 84
Systems, definition of, 60


Talchir stage, 205, 206
Tarannon shales, 174-177
Teall, J. J. H., 289
Terrestrial rocks, 99
Thanet sands, 244
Thinning out, 28
Thrust plane, 34;
detection of, 35, 82
Tiddeman, B. H., 87, 263, 270
Till, 262
Time, geological, 294-296
Toarcian series, 227, 229
Topley, W., 130, 239
Torridonian beds, 135-137
Tremadoc slates, 152, 155, 162, 163
Triassic fauna and flora, 223-225
Triassic system, 218-225;
ammonite zones of, 225
Trinucleus fauna, 165
Tullberg, S. A., 162
Turonian series, 236


Unconformity, 60, 78, 98
Underclays, 197
Uniformitarianism, 287-292
Uriconian rocks, 138
Ussher, W. A. E., 183


Valentian beds, 175
Verneuil, E. P. de, 161
Volcanic rocks, Cambrian, 155;
Carboniferous, 199;
Devonian, 184, 186;
Eocene, 246, 247;
Ordovician, 165-170;
Precambrian, 146
Vulcanicity, 289


Waagen, W., 213, 214
Walcott, C. D., 144, 158, 160, 161, 173
Wallace, A. R., 124, 235, 240, 281, 295
Ward, J. C., 87, 88, 263, 295
Warming, E., 115
Watts, W. W., 142, 168, 178
Wealden beds, 236, 237
Webster, T., 18
Weissliegende, 214
Wenlock limestone, 175, 176
Wenlock series, 174-177
Wenlock shale, 175-177
Werfener Schichten, 225
Werner, A. G., 12
Weybourne crag, 256
Whewell, W., 50
Whidbourne, G. F., 91
White Jura, 226
Whitehaven sandstone, 202
Whitehurst, J., 11, 12
Wiman, C., 46
Wood, S. V., 250, 259
Woodward, H., 191
Woodward, H. B., 68, 130, 131
Woodward, J., 8-10
Woodward, S. P., 108, 111
Woolhope limestone, 175
Woolwich beds, 244
Wright, G. F., 263


Yoredale series, 192


Zanclean series, 256
Zechstein, 209
Zone, fossil, 67;
ammonite, 225, 237;
graptolite, 69