556 



INDEX 



Compression joints, 265. 



Compression, lateral, 255t, 336; origin 

 of, 337- 



Compsognathus, 471. 



Concretions, 227f, 229*, 230*. 



Condylarthra, 505. 



Cones, alluvial, 137, 138*; volcanic, 54. 



Coney Island, waste of, 118. 



Conformity, 269 ; deceptive, 270. 



Conglomerate, 207 ; basal, 271 ; coral, 168. 



Coniferse, Carboniferous, 421 ; Creta- 

 ceous, 485; Devonian, 400; Jurassic, 

 462; Miocene, 515; Oligocene, 508; 

 Permian, 432; Triassic, 449. 



Conocardium, 401*, 402. 



Conocoryphe, 373*. 



Consequent drainage, 323 ; streams, 321. 



Consolidation of sediment, 182. 



Contact metamorphism, 288. 



Contemporaneous erosion, 272*. 



Contemporaneous sheet, 277f , 282. 



Continental, glaciers, no; platform, 160, 

 162*. 



Contorted folds, 240. 



Comtlaria, 419*, 425. 



Copper, 266, 364 ; deposition of, 130. 



Coquina rock, 171*. 



Coral limestone, 213 ; reefs, 166. 



Coralliochama, 488. 



Corals, i65f ; Cambrian, 372 ; Carbonif- 

 erous, 422 ; Cretaceous, 487 ; Devon- 

 ian, 400 ; Jurassic, 463 ; Mesozoic, 441 ; 

 Ordovician, 379; Palaeozoic, 367 ; Per- 

 mian, 432; Silurian, 389; Triassic, 450. 



Cordaites, 421, 432. 



Cordillera, 333. 



Cordilleran ice-sheet, 526, 527, 531. 



Cormorants, fossil, 492. 



Corniferous epoch, 355; series, 394; 

 stage, 394, 396f. 



Coryphodon, 505. 



Cosoryx, 516. 



Cotopaxi, 51. 



Country rock, 265. 



Crabs, 464, 488, 503. 



Cranes, fossil, 516. 



Crater Lake, 39* ; ring, 39. 



Creep of shales, 82*. 



Creodonta, 505, 506, 508. 



Cretaceous period, 355, 474"f\ 



Crete, changes of level in, 66. 



Crevasse in glacier, 107*. 



Crinoidal limestone, 213. 



Crinoidea, Cambrian, 372; Carbonifer- 

 ous, 422 ; Cretaceous, 487 ; Devonian, 

 400; Jurassic, 464; Mesozoic, 441; 

 Ordovician, 380; Palaeozoic, 367; Per- 

 mian, 432 ; Silurian, 390 ; Triassic, 450. 



Crioceras, 488. 



Crocodiles, Cenozoic, 495 ; Cretaceous, 

 491 ; Eocene, 503 ; Jurassic, 470 ; Oligo- 

 cene, 508 ; Triassic, 454. 



Cross-bedding, 223*, 224f; faults, 248. 



Cross Timber Sand, Lower, 475. 



Crossopterygii, 4 o5t, 426, 453, 467. 



Crust of earth, 8 ; formation of, 357. 



Crustacea, Cambrian, 372 ; Cretaceous, 

 488 ; Devonian, 400 ; Jurassic, 464 ; 

 Mesozoic, 442 ; Ordovician, 381 ; Silu- 

 rian, 391. 



Cryptogams, Palaeozoic, 367. 



Crystal, definition of, 9. 



Crystalline rocks, 188. 



Crystallites, 46. 



Crystallization, 12 ; of rock magmas, 192 ; 

 systems of, 9. 



Crystals, compound, 14; cruciform, 14; 

 geniculate, 14; physical properties of, 

 11; secondary forms of, 13; twinned, 14. 



Ctenacodon, 493. 



Ctenodits, 426. 



Cube, 9*. 



Cubical system of crystals, 9. 



Culm, 4i6f, 417. 



Cupressites, 462. 



Cupressocrinus, 400. 



Current bedding, 224. 



Cycads,40o; Carboniferous, 421 ; Creta- 

 ceous, 485; Jurassic, 462; Mesozoic, 

 441; Permian, 432; Triassic, 449. 



Cycles of denudation, 303^ 340, 341. 



Cycloceras, 426. 



Cyclonema, 392*, 393. 



Cyclotosaurus, 453. 



Cynodictis, 506. 



Cynoglossa, 432. 



Cypres a, 488, 516. 



Cypresses, fossil, 502. 



Cyrtina, 451. 



Cystidea, Cambrian, 372; Devonian, 

 400 ; Ordovician, 380 ; Palaeozoic, 367 ; 

 Silurian, 390. 



