6go 



INDEX 



Cephalaspis, 421 

 Cephalopods, Cambrian, 361 



Cretaceous, 554 



Devonian, 417 



Jurassic, 512 



Mississippian, 433, 437 



Ordovician, 378-380 



Pennsylvanian, 468 



Permian, 480, 481 



Silurian, 397 



Triassic, 498, 499 

 Ceratites nodosus, 498 



whitneyi, 500 

 Ceratops beds, 539 

 Ceratosaurus nasicornis, 516 

 Ceraurus pleurexanthemus, 378 

 Cerithium paskentaensis, 531 

 Cerithium (?) texanum, 530 

 Cetaceans, 571 

 Chadron formation, 575 

 Chalk, 267 



origin of, 537 

 Chamberlin, R. T., cited, 226, 241, 310, 



45i 

 Chamberlin, T. C., cited, 43, 52, 131, 



226, 337, 374, 376, 628, 630, 632, 645 

 Champlain epoch, 633 

 Champsosaurus, 551 

 Changes of level, effect on streams, 101 



during Pleistocene, 66 1, 662 

 Charleston earthquake, 210 

 Chautauquan series, 402 

 Chazy limestone, 368 

 Chemical deposits in sea, 193, 199 



sediments, 268 

 Chemung fauna, 420 



formation, 402, 406 

 Chert, 268, 288 

 Chesapeake Bay, 106 

 Chesapeake formation, 581 

 Chester series, 426, 427 

 Chickamauga limestone, 369 

 Chico series, 526, 540 

 Chief Mountain, 542 

 Chimney-rocks, 179 

 China, Cambrian glacial beds in, 357 



coal in, 457 

 Chloritic rock, 291 

 Chlorite, 256 

 Chonetes cornutus, 396 



coronatus, 419 



granulifera, 469 

 Choristoceras marshi, 498 

 Chrysolite, 255 

 Cidaris coronata, 511 



Cincinnati Arch, 373 

 Cincinnatian epoch, 368 

 Cinder-cones, 236 

 Cladoselache fyleri, 439 

 Cladodus springeri, 433 

 Claosaurus annectens, 549 

 Clark, W. B., cited, 532 

 Classification of rocks, 297 

 Clastic rocks, 267, 269 

 Clear Fork limestone, 471 

 Cleland. H. F., cited, 101 

 Cliff glaciers, 130 

 Cliffs in arid regions, 83, 94 

 Climacograptus bicornis, 385 

 Climate, Cambrian, 356 



Comanchean, 528 



Cretaceous, 545 



Devonian, 413 



effect on erosion, 81 



Eocene, 564 



Jurassic, 507 



Miocene, 591, 598 



Ordovician, 376 



Pennsylvanian period, 463 



Permian, 476 



Pleistocene, 613, 648 



Pliocene, 611 



Proterozoic, 342 



Quaternary, 613, 648 



Silurian, 393 



Triassic, 490 



Climates of past, criteria of, 195 

 Clinton beds, 388, 389 



iron ore, 389 

 Coal, 269,447,448,486, 507, 538. 559, 560 



Eocene, 559 



Jurassic, 506, 507 



Laramie, 538 



Pennsylvanian, 443 et seq. 



varieties of, 453 

 Coal-beds, extent of, 453 

 Coal fields, 443-445 

 Coal measures, 441 

 Coastal plain, structure of, 524 

 Coast lines. See shore lines. 

 Cobalt in Huronian rocks, 334, 337 

 Cobleskill limestone, 388 

 Coccosteus decipiens, 423 

 Coeymans limestone, 402 

 Coleman, A. P., cited, 342, 665 

 Coleopters, 467 

 Colorado Canyon, 88 



age of, 606 



Colorado River, delta of, 116, 118 

 Colorado series, 535, 536 



