INDEX 



963 



Lake continued 



Chicago, 879, 880 



Iroquois, 881 



Lahontan, 335, 908 



Maumee, 879, 880 



Nipissing, 883 



Saginaw, 879 



St. Clair, 178 



Superior formations, 456 

 head of, 313 

 iron ore of, 459 

 Proterozoic of, 467 

 region, succession of events in, 



468 

 syncline, 465 



Van, 336 



Warren, 881 



Whittlesey, 881 

 Lakes, 332 



' changes in, 332 



effects of, 337 

 Landes, H. M., 775, 813 

 Landslides, 209 

 Lane, A. C., 393, 624 

 Lapilli, 84, 328 



LaPlace, Marquis de, 415, 416 

 Laplacian hypothesis, 416 



modification of, 430 

 Laramide Range, 359 

 Laramie coal, 750 



series, 746, 749 

 Lariosaurus balsami, 695 

 Lateral moraines, 242, 243, 262, 266, 



865 

 Lateral movements of crust, 358 



planation, 128 



spread of continents, 480 



thrust, cause of, 359, 361 

 Lava, 21, 84, 378, 383 



composition of, 384 



crystallization of, 383 



modes of reaching surface, 391 



temperature of, 384 

 Lava-cones, 379 

 Lava-flows, 370 



of the Deccan, 364 



of the Keweenawan, 461 



of the Tertiary, 813 



surface of, 378 

 Lavas, depth of source of, 385 



rise of, 364 



Lava-streams, flow of, 281 

 Lawson, A. C., 811, 835, 913 

 Lead and zinc of Mississippi basin, 70 

 " Lead coral, "554 



Lead in Illinois, 517 



Iowa, 517 



Missouri, 517, 518 



Wisconsin, 517 

 Leadville limestone, 629 

 Lecanocrinus macropetalus, 549 

 LeConte, J., 359, 366, 835, 836, 837, 



838 

 Leda concentrica, 825 



glabra, 741 



parilis, 797 

 Lefroy Glacier, 234 

 Leith, C. K., 443, 461 

 Lemuroids, Eocene, 787 

 Lepadocystis moorei, 530 

 Leperditia dermatoides, 496 

 Lepidodendrons, 594, 644, 647, 648, 



670 



Lepidodiscus cincinnatiensis, 530 

 Lepocrinites gebhardii, 576 

 Leptama rhomboidalis, 528, 576, 610 

 Lepterpeton dobbsi, 653 

 Leptppora placenta, 608 

 Leucite, 78 

 Leucophyre, 60 



Leverett, F., 866, 873, 876, 878, 890 

 Lewjs, Wm., 750 

 Lewiston Range, 472 

 Lias, 709 

 Lignite, 84 

 Life affected by glaciation, 914 



of interglacial epochs, 916 



of the sea, 291 

 Lima wacoensis, 740 

 Lime carbonate, deposition of, 324 



in deep sea deposits, 329 

 Limestone, 37, 38, 84, 325, 395 



bedding of, 395 



conditions for, 538 



of fresh-water origin, 333, 816 



sinks, 208 

 Limonite, 78 

 Lincoln, D. F., 866 

 Lindgren, W., 778, 811 

 Lingula brevirostra, 715 



rectilateralis, 528 



unbonata, 658 

 Lingulepis pinniformis, 497 

 Liriodendron giganteum, 760 

 Lithic eon, 431 



era, 426 

 Lithosphere, 4, 7 



relief of, 8 



Lithostrotion canadense, 615 

 Little Belt Range, 472 



