INDEX 



693 



Dolomite. 106, 257, 267, 491 

 l)olomi/.:ition, 267 

 Don River beds, 665 

 Dosiniopis Irntii ularis, 573 

 Double Mountain formation, 471 

 I >rainat:e, affected by glaciation, 632 

 Drake, N. F., cited, 561 



.iiochilus nebrascensis, 554 

 Drift, 8, 151 



titution of, 616 



contact with rock, 620 



de|x>sition of, 160 



distribution of, 618 



structure of, 618 



thickness of, 620 



topography of, 620 



transportation of, 1 53 

 Drowning of valleys, 106 

 Drumlins, 627, 629 

 Dumble. !:. T., cited, 600 

 Dunes. 15. 655 



distribution of, 21 



migration of, 19 



ti>|xigraphy of, 16 

 Dust, eolian, 12 



volcanic, 13 



Dutton,C.E.,cited,83,2o6, 226, 245,604 

 Dwyka conglomerate, 474 

 I )\ namic metamorphism, 291 



Earth, constitition of, 315 



form of, 6 



mass of, 3 



origin of, 299 



size of, 6 



specific gravity, n 

 Sarth history, stages of, 313 

 earthquake fissures, 212 



vibrations, 2.08 



waves, 210 

 earthquakes and changes of level, 216 



and faults, 214 

 earthquakes, distribution of, 211 



effect on life, 215, 216 



geologic effects, 207, 211 

 Kasu-rn Interior coal field, 444 

 Katonia medialis, 414 

 Ei cyliomphalus triangullis, 381 

 Kchinocaris punctata, 419 

 Kchinoderms, Cretaceous, 554, 555 



Jurassic, 509-511 



Mississippian, 436 



Ordovician, 383, 384 



Silurian, 395 



Triassic, 499 



Echinoids, Silurian, 396 

 Ecphora quadri( ost.it a, 597 

 ]'.( tonocriiuis grandis. 384 

 Edentates, Eocene, 571 

 Kid ridge, G. H., cited, 583 

 Klertricity, effects of, 29 

 Elephants, Miocene, 592 

 Elephas antiquus, 669 

 Eleutherocrinus cassedayi, 419 

 Elevated barrier beach, 185 

 Ellensburg formation, 607 

 Klotheres, 579 

 Empire beds, 585 

 Enchanted Mesa, 93 

 Endothyra baileyi, 437 

 Englacial drift, 147, 153 

 In-is directus, 595 

 Enteletes hemiplicata, 469 

 Entrenched meanders, 102 

 Eocene carnivores, 570 

 Eocene, close of, 564 



geography of, 564 

 Eocene coal, 559 

 Eocene fiora, 566 

 Eocene in South America, 564 



in West Indies, 564 

 Eocene life, 565 



mammals, 565, 566 



mollusks, 573 



Eocene of western interior, 559 

 Eocene period, 556-580 

 Eocene system, 556 



composition of, 558 



in the west, 558 



thickness of, 558 

 Eolian deposits, 652 



sand, 15 



Eoscorpius carbonarius, 466 

 Eotrocus concavus, 437 

 Epeirogenic movements, 218 

 Epicontinental seas. 5 

 Equisetales, 458 



Eretmocrinus rcmibrachiatus, 434 

 Erian series, 402 

 Erosion, affected by climate, 81 



analysis of, 73-80 



conditions affecting, 80 



cycle of, 66 

 Erosion by glaciers, 147 



by running water, 59 



by waves, 1 76 

 Erosion in arid regions, 83 



in Mississippi basin, 84 

 Erosion of folds, 95 

 Eskers, 164, 165 



