592 



INDEX. 



Devonian arachnoids, ii, 495 

 arthrodirans, ii, 461, 469 

 arthropods, ii, 490 

 bacteria, ii, 493 

 brachiopods, ii, 464, 470 

 bryophytes, ii, 493 

 bryozoans, ii, 467, 477 

 calamarians, ii, 493 

 calamites, ii, 494 

 cephalopods, ii, 454, 459, 465, 



473, 477 

 close of, ii, 439 

 corals, ii, 463, 470 

 cordaites, ii, 493 

 crinoids, ii, 456, 459, 464, 470 

 crossopterygians, ii 461 

 cycadofilices, ii, 493 

 echinoderms, ii, 459, 464, 470, 



477 

 economic products of, ii, 440 

 equisetales, ii, 493 

 eurypterids, ii, 480, 490 

 fauna of the Great Basin area, 



"» 479 

 faunas, ii, 449 

 Alices, ii, 493 

 fish, ii, 459, 460, 486 

 foreign, ii, 441 

 forests, ii, 493 

 ganoids, ii, 461 

 gas and oil of, ii, 440 

 gastropods, ii, 454, 459, 466, 



473, 477 

 ginkgos, ii, 493 

 gymnosperms, ii, 492, 493 

 insects, ii, 494 

 land life of, ii, 491 

 land plants, ii, 491 

 lepidodendron, ii, 493 

 life, ii, 448 



life of land waters, ii, 480 

 lycopodiales, ii, 493 

 Middle, ii, 424 



geographic changes during s 

 ii, 430 

 myriapods, ii, 495 

 ostracoderms, ii, 482, 483 

 outcrops of, ii, 438 

 pelagic life of, ii, 479 

 pelecypods, ii, 473, 477 

 period, ii, 418 

 phosphates of, ii, 440 

 protozoans, ii, 467 

 psaronius, ii, 493 

 pteridophytes, ii, 492, 493 

 pteropods, ii, 473 

 pteridosperms, ii, 493 

 scorpions, ii, 495 

 sigillaria, ii, 493 

 sphenophyllales, ii, 49; 

 spermatophytes, ii, 493 

 sharks, ii, 469, 489 

 sponges, ii, 467 

 subdivisions, of, ii, 418, 420 

 thallophytes, ii, 493 

 tree-ferns, ii, 493 

 trilobites, ii, 467, 477 

 Upper, ii, 430 

 of the West, ii, 435 

 Diabases, i, 418, 431, 469 



Diadectes, ii, 650 

 Diadematoida, iii, 85 

 Diallage, i, 400, 462 

 Diamond Peak quartzite, iii, 576 

 Diapsida, ii, 647, 649; in, 42 

 Diastrophism, i, 2, 329, 526 



Archeozoic, ii, 144 



effect on coast lines, i, 329 



on planetesimal hypothesis, ii, 

 117 



Pleistocene, iii, 460, 465, 480 

 Diatom ooze, 1, 380, 382 425, 



469 

 Dibelodon, iii, 285, 323 

 Dibranchiata, iii, 56 

 Diceratherium iii, 289 

 Dichocrinus inornatus, ii, 520 

 Dichograptus logani, ii, 362 



octobrachiatus, ii, 362 

 Diconodon, iii, 255 

 Dicotyledons, introduction of, iii, 



175 

 Dicranurus hamatus, ii, 455 

 Dictyonema beds, ii, 299 

 Dictyopteris rubelia, ii, 593 

 Dicynodont'ia, ii, 650, 651 

 Didelphys, iii, 240, 253 

 Didymograptus, ii, 364 



nitidus, ii, 362 

 Dielasma bovidens, ii, 616, 617 

 Differentiation of earth matter 

 by vulcanism, ii, 120 



of rocks during growth of 

 earth, ii, 119 

 Diffusion, of carbonic acid gas 

 of ocean, ii, 666 



cause of crustal movement, i, 

 555 



in earth's interior, i, 555 

 Dikellocephalus, ii, 300 



fauna, ii, 241, 299 



pepinensis, ii, 299, 300 

 Dikes, i, 591 



effect on topography, i, 143 



limestone, iii, 263 



sandstone, i, 514 

 Diller. J. S., cited, i, 29, 514; ii, 

 436, 555 5 iii, 67, 122, 160, 

 161, 164, 201, 202, 203, 212, 

 214, 264, 265, 266, 274, 277, 

 281 ; (and Stanton), iii, 122 

 Dimetrodon, ii, 648, 649 

 Dimorphodon, iii, 101 

 Dinichthys, ii, 461, 463 



herzeri, ii, 463, 469 

 Dinictis, iii, 253 

 Dinoceras beds, iii, 208 



mirabile, iii, 233 

 Dinocerata, iii, 232, 25s 

 Dinorthis porca, ii, 367 

 Dinosauria, iii, 42 



Cretaceous, iii, 176 



Jurassic, iii, 97 



Triassic, iii, 43 

 Dinotherium, iii, 285, 323 

 Diorites, i, 416, 452, 469 

 Dip, i, 501 



quaquaversal, i 504 

 Dip-fault, i, 522 

 Diplacanthus, ii, 490 



Diplacodon beds, iii, 209 

 Diplodus, ii, 614 

 Diplograptus pristis, ii, 362 

 Diplopodia texanum, iii, 135 

 Dipnoi, ii, 487 

 Dipterus, ii, 487 



valenciennesi, ii, 488 

 Di Rossi, M. S., cited, i, 537 

 Discorbina turbo, iii, 241 

 Displacement of fault, i, 514 

 Disruption, tidal, ii, 22 

 Disruption of rock, by carbona- 

 tion, i, 43 



by changes of temperature, i 

 44.49 



by hydration, i, in 

 Disruptive approach, ii, 54 

 Distributive fault, i, 519 

 Divides, permanence of, i, 69 

 Docalcic rocks, i, 458 

 Dodge, R. E., cited, i, 204 

 Dofemane, i, 455 

 Dofemic rocks, i, 454 

 Doferrous rocks, i, 459 

 Dohemic rocks, i, 457 

 Dolenic rocks, i, 456 

 Dolerites, i, 417, 452, 469 

 Dolichopithecus, iii, 325 

 Dolichosoma, ii, 608 

 Dolichosaurs, iii, 185 



Cretaceous, iii, 180 



Triassic, iii, 43 

 Dolomites, i, 424, 469 

 Dolores formation, iii, 69 

 Domagnesic rocks, i, 459 

 Domalkalic rocks, i, 458 

 Domes of crust, strength of, i 



581,582 

 Domilic rocks, i, 582 

 Domiric rocks, i, 458 

 Domirlic rocks, i, 458 

 Domitic rocks, i, 457 

 Don formation, iii, 491 

 Dopolic rocks, i, 456 

 Dopotassic rocks, i, 458 

 Dopyric rocks, i, 457 

 Doquaric rocks, i, 456 

 Dorycrinus, ii, 522 



missouriensis, ii, 525 

 Dosalic rocks, i, 454 

 Dosiniopsis lenticularis, in, 243 

 Dosodic rocks, i, 458 

 Dotilic rocks, i, 457 

 Double mountain formation, ii, 



623 

 Drainage, changes in, effected by 

 glaciation, iii, 379 



effect of change of level on, i, 

 161 



mature, i, 86 



of glaciers, i 273 



old age, i, 89 



youthful, i, 86 

 Drake, N. F., (and Lindgren,) 



cited, iii, 210, 212, 299 

 Dreikanter, i, 40 

 Drepanochilus nebrascensis, iii, 



189 

 Drift, i, 287, 469 



bowlders of, iii, 340 



