INDEX 



559 



Favosites, 389, 392*. 



Felsite, 198*)% 297. 



Felsitic texture, 190-t", 196. 



Felspar, i6f, 190, 193, 194, 196, 289, 293, 

 294 ; weathering of, 74. 



Felspar porphyry, 198. 



Felspathic sandstone, 206. 



Felspathoids, 17-f/, 193, 194. 



Ferns, Carboniferous, 418 ; Cretaceous, 

 485; Devonian, 400; Eocene, 502; Ju- 

 rassic, 462; Mesozoic, 441 ; Palaeozoic, 

 367; Permian, 432; Triassic, 448. 



Ferro-magnesian minerals, 193, 196. 



Figs, fossil, 516. 



Fire-clay, i35t, 2o8f, 413. 



Fishes, Carboniferous, 426; Cretaceous, 

 490; Devonian, 404, 406; Eocene, 503; 

 Jurassic, 467 ; Oligocene, 508 ; Ordo- 

 vician, 384; Permian, 435; Silurian, 

 393; Triassic, 452. 



Fissility, 26o*t, 334 ; cause of, 262. 



Fissure, 243 ; earthquake, 63 ; eruptions, 

 56, 519 ; springs, 93*. 



Fjords, 307*, 3iif. 



Flabellaria, 502*.' 



Flagstone, 206. 



Flamingoes, fossil, 516. 



Flies, fossil, 442, 465. 



Flightless birds, 503. 



Flint, i6f, 210, 214. 



Flint conglomerate, 207. 



Flood plain, 137. 



Flora, 367 ; Glossopteris, 437. 



Florida, anticline, 520 ; island, 499 ; pe- 

 ninsula, 514. 



Florissant, Oligocene lake, 507. 



Fluor-spar, 24. 



Fluviatile deposits, 136. 



Focus of earthquake, 62. 



Folded strata, 318. 



Folding, causes of, 254 ; experiments on, 

 256. 



Folds, 232!, 233, 237*, 238. 



Foliated rocks, 295. . 



Foliation, 260-j-, 290. 



Foot wall, 243. 



Foraminifera, Carboniferous, 421 ; Creta- 

 ceous, 487 ; Devonian, 400 ; Eocene, 

 502; Jurassic, 462 ; Ordovician, 379. 



Foraminiferal ooze, 176, 178*. 



Forests, buried, 67. 



Fort Pierre substage, 475, 482^ 



Fossils, 343 ; in metamorphic rocks, 287 ; 



modes of preservation of, 345. 

 Fox Hills substage, 475, 482^ 

 Fragmental products (volcanic), 5of, 



2 77 f. 



Fragmental texture, 190. 

 Fredericksburg stage, 475. 

 Fresh-water lakes, deposits in, 143 ; lime- 

 stone, 212. 

 Front Range (of Rocky Mountains), 397. 

 Frost, destructive work of, 80. 

 Fusulina, 421, 423*; limestone, 417. 

 Fusus, 488. 



GABBRO, 202f, 284. 



Galena, 268. 



Gallinaceous birds, fossil, 516. 



Gangamopteris, 437. 



Ganges, delta of, 141, 142 ; material 

 transported by, 102. 



Gangue, 266. 



Gannett, H., 322. 



Gannister, 135. 



Ganodonts, 505. 



Ganoidei, 406, 426, 453, 467, 490. 



Garnet, 289. 



Gaseous products (volcanic), 53. 



Gastropoda, Cambrian, 374; Carbonif- 

 erous, 425 ; Cretaceous, 488 ; De- 

 vonian, 402; Eocene, 503; Jurassic, 

 466; Mesozoic, 442 ; Ordovician, 382; 

 Permian, 434; Silurian, 393 ; Triassic, 

 452. 



Geanticline, 236. 



Geikie, Sir Archibald, 366. 



Geikie, J., 526, 535, 536. 



Geographical changes, shown by fossils, 

 352 ; by rocks, 220 ; faunas, 348. 



Geology, defined, 1; dynamical, 7, 27f; 

 historical, 7, 343")-; history of, 1-4; 

 physical, 7; physiographical, 7, 30of ; 

 structural, 7, i86f; subdivisions of, 7. 



Georgian epoch, 355, 368. 



Geosyncline, 236. 



Geyserite, 128, 210. 



Geysers, 96. 



Giant's Causeway, 262. 



Giant Spring, 95. 



Gingko, 432, 502. 



Giraffes, fossil, 522. 



