682 



INDEX. 



Coal Measures Period, 530 (see 

 also Pennsylvanian) 



duration of, 582 

 Coal plants, climatic implications 

 of, 603 



varieties of, 576 

 Cobleskill formation, 389 



limestone, 370 

 Coccosteus decipiens, 487 

 Ccelenterata, Cambrian, 286 



Devonian, 456, 463, 470, 476 



Mississippian, 521, 523, 530 



Ordovician, 360, 361 



Silurian, 407 

 Coleman, A. P., cited, 151, 181, 



217 

 Collier, A. J., cited, 390 

 Collision, origin of nebulae by, 

 21 



of planetesimals, 66, 72 



of stars, 53 

 Columnaria alicolata. 361 

 Comarocystis punctatus. 359 

 Comets and meteorites, rela- 

 tions of, 36 

 Compsacanthus, 614 

 Comstock. T. B , cited, 221, 265 

 Conemaugh series, 542, 557, 560 

 Conifers, Carboniferous, 601 

 Conocardium, Onondagan, 467 



meekanum, 533 



prattenarum, 533 



trigonale, 463 

 Conocoryphe, 299 

 Conradella fimbria ta, 35 3 

 Constellaria polystomella, 358 

 Continental creep, 131 



and oceanic segments, adiust- 

 ment of 235 



platforms, origin of, t 07-111 



and suboceanic sectors, 123 

 Conularia, 459- 473. 478 



Silurian, 407 



trentonensis, 353 

 Copper. Keweenawan, 198 



Lake Superior, 198 



Permian, 629, 630 

 Coral reefs, 414 



Silurian, 407 

 Corals, Cambrian, 287 



Carboniferous. 616 



Devonian. 463, 47<> 



Genevieve. "530 



Hamilton, 470 



Helderbergian, 456. 457 



Kinderhook, 520, 521 



Mississippian. 523 



Onondagan. 463 



Ordovician, 360, 361 



Oriskanv. 459 



Osage, 523 



Silurian. 406, 407 



Upper Cambrian, 299 

 Sorbin conglomerate. 560 

 Cordaites, 600, 602 



borassifolius, 602 



Carboniferous, 600 



Devonian, 493 



Mississippian, 537 



Permian, 645 



Cordianthus sp., 594 

 Cordilleran region, Proterozoic 



of, 209 

 Corniferous, 426 

 Cornua. 484 



Cornwallis, Ordovician of, 342 

 Corymbocrinus, 411 

 Cosmopolitan development of 



Ordovician lite, 343 

 Cotylosauria, 648. 650 

 Cragin, F. W., cited. 62T, 622 

 Cranberry granite, 152 

 Crania lcelia, 356 



Silurian, 404 

 Credner. H., cited, 270 

 Crepicephalus, 299 



texanus, 299 

 Crepipora hemispherica, 358 

 Crested Butte region, 154 

 Crinoid curve, 526 

 Crinoidea, Carboniferous, 6t6. 

 617 



Devonian, 464, 470 



Genevieve, 530, 532 



Helderbergian. 456 



Kinderhook, 519, 520 



Ordovician, 359 



Oriskany, 459 



Osage. 522. 525 



Silurian, 400, 403 



Waver ly t 527 

 Croll, J., cited, 21 

 Cross. W., cited, 624 

 Crossopterygians, 487 



Devonian, 461 

 Crotalocrinus, 410 



pulcher, 403 

 Crushing strength of rock, 127 

 Crust, on Laplacian hypothesis, 7 

 Crustacea. Cambrian, 283 



Devonian. 456, 459. 467, 471 



Mississippian, 521, 533 



Ordovician. 348 



Pennsylvanian, 618 



Silurian. 408 

 Crustal adjustments, 237 



due to easing of stresses, 237 



due to gradation, 236 



due to thermal changes. 237 

 Cryphaeus boothi, 471 

 Cryptomeria, 645 

 Cryptonella, 465, 472 

 Crystal Falls region, Huronian 



series of, 180 

 Ctenodonta nasuta. 354 



pectunculoides, 354 



recurva, 354 

 Ctenodus, 537, 614 

 Cuboides zone, 475 

 Culm formation. 513 

 Cummins, W. F . cited, 563, 6?3 

 Cud coral. Silurian. 407 

 Cushmg, HP., 205 

 Cuvahoga formation. 5 jo 



shale. 560 

 Cyathaspis. 483, 484 

 Cycadofilices, Devonian, 493 



Mississippian. 537 



Pennsvlvanian. 592, 595 



Permian, 643 



Cvcads, Carboniferous, 601 

 Cyclonema bihx, 353 

 Cyclostomes, 486 

 Cyctoceras neleus, 352 

 Cymoglossa. 644 



obtusifoha, 643 

 Cynognathus crateronotus 651 

 Cyphaspis christyi, 403 

 Cypricardella belhstriatus. 471 

 Cyrtina, 465 



acutirostns, 520, 521 



dalmani, 455 



hamiltonensis, 462, 478. 521 

 Cyrtoceras, 473 



Onondagan, 466 

 Cyrtohtes omatus, 353 

 Cystids, Devonian, 459. 464, 470 



Genevieve, 530 



Helderbergian, 456 



Middle Cambrian. 299 



Ordovician, 357 



Silurian, 403 



Upper Cambrian, 299 



DadoxyJon. 6or 

 Dalmanella elegantula. 409 

 subcarinata, 455 

 testudinaria, 356, 367 

 Dalmanites, 467, 473 

 Dana. J. D., cited, 82, 258, 336, 



538 

 Darton, N. H., cited, 254. 437, 



505. 506, 621 

 Darwin, G. H., cited, 6, n, 14, 



18, 40 

 David. W. E., cited, 159, 273, 



632, 633 

 Dawson, G. M , cited, 250, 237, 

 308. 300, 435- 506, 507, 

 5io, 555. 556, 624 

 Dawson, J. W., cited, 346. 495, 



610 

 Dean, B , cited. 534 

 Deformation, modes of, under 

 planetesimal hypothesis, 122 

 Permian, 656 

 Post-Permian, sequences of, 



660 

 and submergence, 233 

 Deformations, under Laplacian 

 hypothesis, 125 

 on planetesimal hypothesis, 

 117, 122 

 Deformative movements of 



Keweenawan, 194 

 Deiphon, 411 

 forbesi, 403 

 DeLapparent, A., cited, 159. 215, 

 270, 338, 342, 514. 627, 

 628, 629, 630, 631 

 Delaware Water Gap, 373 

 Dendrocrinus polydactylus, 359 

 Derbyia crassa, 616, 617 

 Des Moines formation, 542 



series. 561 

 Devonian, abysmal life of, 479 

 acanthodians, 489 

 actinopterygians, 489 

 annelids, 467 

 arachnoids, 495 



