INDEX. 



593 



Drift, composition of, i, 304; iii, 

 338 

 deposition of, i, 298-305 

 distribution of, iii, 343 

 stratified, extra-glacial, iii, 377 

 intermorainic, iii, 378 

 sub-morainic, iii, 377 

 super-morainic, iii, 377 

 topographic distribution of, 

 iii, 378 

 structure of, iii, 341 

 thickness of, iii, 346 

 topography of, iii, 344 

 wear of, in transit, i, 298 

 Drift and underlying rock, iii, 



346 

 Drift-sheets, imbrication of, iii, 

 394 

 map of, iii, 390 

 relative ages of, iii, 414 

 Dromotherium, iii, 45 

 Drumlins, iii, 360, 361, 362 

 Drygalski, E. von, cited, i, 322 

 Dryokstes vorax, iii, 105 

 Dryopithecus, iii, 289 

 Dryptosaurus, iii, 176 

 Dumble, E. T., cited, ii, 320; 



iii, 200, 262, 299, 302 

 Dump moraines, i, 301 

 Dundee limestones, iii, 353 

 Dune areas, topography of, i, 32 

 Dunes, i, 24-37 



distribution of, i, 35 

 effect of vegetation on, i, 29 

 formation of, i, 26 

 migration of, i, 33 

 shapes of, i, 26 

 slopes of, i, 29 

 Dunkard series, ii, 542, 557, 



558; iii, 554 

 Durocher, J., cited, ii, 84 

 Dust, volcanic, i, 22, 23 



wind-blown, i, 22 

 Dust-wells, i, 269, 280 

 Dutton, C. E., cited, i, 132, 534, 

 574, 636; ii, 236; iii, 152, 

 214, 274, 275, 3ii, 312, 574 

 Dwyka conglomerate, ii, 602 

 Dyas formation, ii, 626 

 Dynamic geology, i, 1 



Eagle Ford formation, iii, 117, 



142 

 Earlier Wisconsin glacial stage, 



iii, 392 

 Early atmosphere, character of, 



ii, 87 

 Early Cambrian, geography of, 



ii, 222 

 Early climates, ii, 87 

 Early Cretaceous (see also 



Comanchean), close of, iii, 



130 

 Early glaciations, ii, 87 

 Early stages of earth's history, 



nebular hypothesis, ii, 90 

 Earth, the, as a planet, i, 2 

 constitution, i, 5 

 crust, i, 13 

 deformation of, i, 526 



Earth, the, dependence on sun, 

 i, 4 

 distance from sun, i, 3 

 inclination of axis, i, 3 

 interior of, i, 14, 559 

 internal heat, i, 559-574 

 motions, i, 3 

 orbit, i, 3 



sphere of activity for, ii, 62 

 structure, conceptions of, ii, 



133 

 tremors of surface, i, 526 

 warpings of crust, i, 526-89 

 Earth-moon ring, ii, 5 

 Earthquake vibrations, i, 526 

 amplitude of, i, 529 

 sequences of, i, 533 

 Earthquakes, i, 527-537 

 causes of, i, 527 

 Charleston, i, 534 

 destruction of life by, i, 536 

 destructive effects of, i, 530 

 distribution of, i, 533 

 epicentra of, i, 531 

 foci of, i, 527 

 gaseous emanations during, i, 



533 

 geologic effects of, i, 534~537 

 Lisbon, i, 535 

 Earth's crust, composition of, i, 

 14. 396 

 warpings of, i, 538-551 

 Earth's history, atmosphereless 

 stage, ii, 92 

 atmospheric stage, ii, 95 

 hypothetical early stages of, 

 under Laplacian hypoth- 

 esis, ii, 82 

 nuclear stage, ii, 92 

 synoptical view of, ii, 119 

 Earth's origin, ii, 1 



hypotheses of, ii, 3 

 Eastern Interior coal-field, ii, 



548 

 Eastern provinces of Canada, 



Proterozoic of, ii, 204 

 Eastman, C. R., cited, i, 658; ii, 



430 

 Easton schist, iii, 267 

 i^atonia, ii, 459; iii, 295 



medialis, ii, 455 

 Ecca shales, ii, 636 

 Eccentricities of planetary or- 

 bits, ii, 79 

 Eccyliomphalus triangulus, ii, 



353 

 Echinocaris punctata ii, 471 

 Echinodermata, geologic con- 

 tributions of, i, 661 

 Echinoderms, Cambian, ii, 

 286 

 Devonian, ii, 459, 464, 470, 



477 

 Jurassic, iii, 91, 92 

 Mississippian, ii, 519, 522, 



530 

 Ordovician, ii, 357, 359 

 Pennsylvanian, ii, 617 

 Silurian, ii, 400 

 Triassic, iii, 57 



Echinoidea, iii, 134 

 Comanchean, ii, 135 

 geologic contributions of, i, 



661 

 Jurassic, iii, 85 

 Miocene, iii, 294 

 Triassic, iii, 57 

 Economic geology, i, 1 

 Ecphora, iii, 294 



quadricostata, iii, 294 

 Ectenocrinus grandis, ii, 359 

 Edaphic development of Ordovi- 

 cian life, ii, 343 

 Eden shale, iii, 555 

 Edentata, iii, 229 

 Eocene, iii, 238 

 Efflorescence, i, 42 

 Egypt, Pliocene of, iii, 320 

 Ehrenbergia, iii, 294 

 Elaeolite, i, 462 

 Elbert formation, iii, 573 

 Eldridge, G. H., cited, ii, 154, 



506,563; iii, 116, 201, 263; 



(and Cross and Emmons), 



iii, 570 

 Electricity, atmospheric, i, 43 

 chemical effects of, i, 43 

 geological effects of, 1, 43 



52 

 Elephants, Pleistocene, iii, 496 



Pliocene, iii, 323 

 Elephas primigenius, iii, 324 

 Eleutherocrinus, ii, 470 



cassedayi, ii, 471 

 Elevation hypothesis of glacial 



climate, iii, 424 

 Elevation, post-Pliocene, and 



climate, iii, 316 

 Elk River series, ii, 558 

 Ellensburg formation, iii, 211, 



266, 267 

 Ellipsoidir.a, iii, 294 

 Ellipticity of orbit of planetesi- 



mals, ii, 65 

 Ellis formation, ii, 153; iii, 70, 



157, 166, 568 

 Ells, R. W., cited, i, 443; ii, 141 ; 



iii, 370 

 Elotheres, Miocene, iii, 284 



Oligocene, iii, 255 

 Elotherium, iii, 253 

 crassum, iii, 234 

 Ely greenstone, ii, 150 

 Embolophorus, ii, 649 

 Emerson, B. K., cited, ii, no, 



213, 549; "i, 11, 14, 546 

 Emmons, E., cited, ii, 145, 310, 



37o 

 Emmons, S. F., cited, i, 474; ii, 



26, 154. 267, 268, 505, 507, 



510, 552; iii, 149, 155, 164; 



(and Cross and Eldridge), 



Hi, 570 

 Emmons, W. H., cited, i, 474, 



573, 585 

 Empedias, ii, 650 

 Empire beds, iii, 263 

 Encrinital limestone, ii, 523 

 Endothyra baileyi, ii, 531, 532 

 Energy of ancestral system, ii, 51 



