562 



INDEX 



Iron pyrites, 25. 

 Ironstone, 211. 

 Irregulares, 464-f-, 487, 502. 

 Irwell River, terraces of, 140. 

 Isastrcea, 463. 

 Ischypterus, 453. 

 Islands, volcanic, 55, 56. 

 Isoclinal folds, 240, 241*. 

 Isometric system of crystals, 9. 

 Isopoda, 402, 465. 

 Isostasy, 68, 69. 

 Isotropic crystals, n. 



Jackson stage, 496. 



James River stage, 475. 



Japan, earthquakes of, 64; Triassic of, 



448. 

 Jelly-fish, Cambrian, 371. 

 John Day stage, 496, 512+. 

 Johnstown, Pa., flood of 1889, 101. 

 Joints, 48, 81, 262f. 

 Jupiter Serapis, temple of, 66. 

 Jura Mountains, 323. 

 Jurassic period, 457. 



Kames, 312, 528T. 



Kansan stage, 529, 530. 



Kaolin, 90, 207! ; formation of, 74. 



Kaolinite, 22. 



Karoo series, 437, 448. 



Keewatin glacier, 526. 



Kemp, J. F., 193, 194, 296. 



Keokuk substage, 409. 



Kettle moraine, 155. 



Keuper, 447. 



Kilauea, 40*, 41*, 42*, 44*, 45*. 



Kinderhook stage, 409, 411. 



Kittatinny Mountain, 314; peneplain, 



342; plain, 481. 

 Knoxville stage, 475, 478f. 

 Koninckina, 451. 

 Kootanie stage, 475, 477f. 

 Krakatoa, eruption of, 38*. 



LABRADORITE, 16, i7f, 201, 202. 

 Labyrinthodon, 453. 

 Laccolite, 283. 



Laccolith, 283*, 284*, 285* 338. 

 Laccolithic mountains, 338. 

 Lacertilia, 469, 491, 495. 



Lee laps, ^2.. ' 



Lafayette formation, 519, 530. 



Lake, Agassiz, 531 ; Bonneville, 146, 

 147*- 33o, 533 I Erie, 535 ; Great Salt, 

 146, 147* ; Huron, 535 ; Iroquois, 535 ; 

 Lahontan, 151, 533; Michigan, 535; 

 Mono, 151 ; Ontario, 535 ; Pyramid, 

 151 ; Superior, deposits in, 145. 



Lakes, 119; deposits in, 143; erosion 

 by, 120 ; fossils in, 344 ; fresh-water, 

 143; glacial, 311; salt, 148; shore- 

 lines of, 121 ; soda, 152. 



Laminse, 219. 



Land barriers, 353 ; bridges, 353 ; Eo- 

 cene, 501 ; Pleistocene, 538. 



Landslips, 92. 



Lapilli, 51. 



Lapworth, Professor, 375. 



Laramie stage, 475, 482^ 



Lateral compression, 255, .336; causes 

 of. 337 ; effects of, 265, 298, 336. 



Laurels, fossil, 502, 516. 



Laurentian lakes, 534; deposits in, 



145- 

 Laurentide glacier, 526. 

 Lava, 42 ; bedding of, 47 ; composition 



of, 44 ; cooling of, 46 ; flows or sheets, 



276*, 277 ; motion of, 44 ; stalactites, 



45* ; texture of, 46. 

 Layer, 219. 

 Lead deposits, 267. 

 Lemming, fossil, 538. 

 Lemuroidea, 505, 506, 508. 

 Lepadocrimts, 392*. 

 Leperdltia, 383*. 

 Lepidodendrids, 400. 

 Lepidodendron, 420, 423*, 432. 

 Lepidolite, 19. 

 Lepidoptera, 465. 

 Lepidotus, 453, 468. 

 Lept(Z?ia, 382. 

 Leptolepls, 468. 

 Leptotragnlus, 506. 

 Leucite, i8f, 199, 201 ; basalt, 201. 

 Level, changes of, 64. 

 Liassic series, 457, 458, 460. 

 Lickas, 390*, 391, 400. 

 Lignite, 2157, 507. 

 Lignitic stage, 496. • 

 Lima, 434. 

 Limburgite, 202. 



