6 9 8 



INDEX 



Cassidulus subconicus, 526. 

 Castoroides, 665, 673. 

 Casts, 379. 



Catskill stage, 452, 454. 

 Cave deposits, 71. 

 Caverns, 70-71. 



Pleistocene deposits of, 66$-666. 

 Caves, sea, 209. 

 Cementation, belt of, 61. 



of sediments, 248. 

 Cenozoic era, 572-683. 



life compared with Mesozoic, 572- 



573- 

 Cephalaspis, 461, 462, 464. 

 Cephalopods, Carboniferous, 481, 483. 



Devonian, 459-460. 



Mesozoic, 528, 531. 



Ordovician, 434-435. 



Silurian, 448. 



Tertiary, 627-628. 

 Ceratites, 528. 

 Ceratites nodosus, 529. 

 Ceratocephala dufrenoyi, 448. 

 Ceratodus, 465, 535. 

 Ceratosaurus, 541. 

 Ceraurus pleurexanthemus, 435. 

 Cercis, 664. 

 Cestracion, 463, 533. 

 Chalcopyrite, 688. 

 Chalk, 249. 



marine erosion of, 205. 



Mesozoic, 523-524. 

 Chamberlin and Salisbury, 336, 365, 



662. 

 Chamonix, glaciers of, 144. 

 Champlain subsidence, 655-656. 

 Champsosaurus, 624. 

 Changes of level, 228-231. 

 Charleston earthquake, 286, 291. 

 Chazy stage, 422, 427. 

 Chemical deposits in lakes, 134. 

 Chemung stage, 452, 454. 

 Chert, 689. 



Child Glacier, movement of, 150, 15 1. 

 Chimborazo, volcano, 310. 

 Chlorite, 690. 

 Chonetes coronatus, 458. 

 Chronology, geological, 380. 



shown by fossils, 380. 

 Chrysolite, 691. 

 Cidaris coronata, 526. 

 Cincinnati anticline, 423. 

 Cincinnatian epoch, 422. 



Cinder cones, 312. 

 Cirques, 143-146. 

 development of, 146. 

 origin of, 145. 

 Cladoselache, 462, 463. 

 Clarke, F. W., 198, 425. 

 Clarke, J. M., 457, 669. 

 Clastic deposits, 239. 

 Clay stones, 76, Jj. 

 Cleavage, 344~345- 



relation to pressure, 349. 

 Cleveland, glacial drift near, 174. 

 Climacograptus bicornis, 428. 

 Climate, and erosion of canyons, 95. 

 and stream erosion, 128. 

 of Cambrian, 417. 



Carboniferous, 503. 



Cretaceous, 570. 



Devonian, 468. 



Eocene, 634-635. 



Jurassic, 570. 



Miocene, 635. 



Oligocene, 635. 



Ordovician, 437. 



Paleozoic, 507. 



Pliocene, 635-636. 



Proterozoic, 398. 



Silurian, 451. 



Tertiary, 634-636. 



Triassic, 569-570. 

 Clinton iron ore, 375, 442. 

 Clinton shale, 439. 

 Cloverly stage, 515. 

 Coal beds, climate during deposition, 



. . 5 ° 3 - 

 conditions necessary for formation of, 



499- 



Cretaceous, 571. 



Eocene, 575. 



modes of occurrence, 499. 



origin of, 499. 



Pennsylvanian, 501-503. 



Triassic, 571. 

 Coal, cannel, 495. 



varieties of, 501. 

 Coal fields, extent and structure of, 

 502. 



location of, in North America, 473- 



474- 

 Coal measures, 502. 

 Coal plants, conditions of growth, 



497- 

 Coastal Plain, 91, 224. 



