INDEX 
Climate, influence upon, in weathering, 
109. 
Climate of Cambrian, 449; of Carbonif- 
erous, 460; of Cretaceous, 468; of Ju- 
ratrias, 464; of New York, Silurian, 
456; of the past, 393; of Permian, 
463; of Quaternary, 475; of Tertiary, 
473. 
Clinton strata, 454. 
Coal, 93, 97; anthracite, 99, 105; forma- 
tion of, 460. 
Coal Measures, 402. 
Coast, destruction of, 234, 239; irregu- 
larities of, 229; retreat of, 254. 
Coast ranges, 308; growth of, 474. 
Cockroaches, 414. 
Colorado Cafion, 161, 170. 
Columnar joints, 280, 281. 
Conchoidal fracture, 38. 
Concretionary force, 277. 
Concretionary ore deposits, 380. 
Concretions, 275, 383. 
Condition of earth’s interior, 21. 
Cone, volcanic, 329, 350. 
Cone deltas, 176. 
Conglomerate, 77, 97, 105, 454, 457; met- 
amorphism of, 371, 372, 375. 
Conglomeritic quartzite, 105, 
Conglomeritic schists, 105. 
Connecticut valley in Triassic, 465. 
Consolidation of rocks, 86, 87, 273. 
Contact metamorphism, 378. 
Contact ore deposits, 384. 
Continental glacier, 195, 213, 218, 475. 
Continental movements, 301. 
Continents, 18; movements of, 301; per- 
manence of, 318; skeleton of, 316. 
Contraction theory, 324. 
Coquina, 52, 77, 78, 89, 97. 
Coral, cemented by solution, 274. 
Coral clay, 97. 
Coral coasts, 246, 247. 
Coral deposits, 237, 239. 
Coral islands, 330. 
Coral polyps, 252. 
Coral reefs, 89, 251. 
Coral rocks, 89. 
Coral sand, hills of, 132. 
Corals, Cambrian, 407; composition of, 
43; conditions favoring growth of, 
491 
252; Devonian, 413, 415, 416; Ordovi- 
cian, 410; Silurian, 410. 
Cordilleras, 308; early history of, 447, 
450; growth of, 468, 470, 474; ores in, 
384. 
Corniferous strata, 402, 457. 
Corrasion, 129. 
Corrosion, 129. 
Crater of volcano, 329, 340, 341. 
Cretaceous, 397, 398, 402; climate of, 
468 ; geography of, 467; landscape of, 
438 ; life of, 426. 
Crevasses, 203. 
Crinoidal limestone, 90. 
Crinoids, 419, 420, 421; Mesozoic, 426; 
Silurian, 410. 
Croll’s Hypothesis, 476. 
Cross-bedding, 268. 
Crumpling of rocks, 286, 288, 370, 377. 
Crust of earth, 17, 20; movements of, 
300. 
Crustaceans, Silurian, 412. 
Cryptocrystalline rocks, 61, 63, 67. 
Crystalline igneous rocks, 59. 
Crystalline minerals, 34, 36. 
Crystals, 33, 35; porphyritic, 65. 
Cumberland Mountains, 307. 
Current-bedding, 268. 
Currents in ocean, 235, 239; of tidal 
origin, 252, 239; of wind origin, 223, 
225. 
Cutting tools of rivers, 158, 173. 
Cuttle-fish, 411. 
Cycads, Carboniferous, 460. 
D 
Darwin-Dana theory of atolls, 255. 
Dead seas, 87. 
Deccan, lava of, 338. 
Deltas, 180, 187; in lakes, 194. 
Denudation, 109, 127, 240, 314. 
Deposits in caves, 84; by glaciers, 208, 
219; in the ocean, 16, 230, 243; of 
plants in the sea, 248; by rivers, 174- 
187; of wind, 137, 138. 
Depression of land, 297. 
Devonian, 397, 398, 400, 402; geography 
of, 457; life of, 414. 
Diabase, 58, 63, 66, 347. 
