INDBK. 



1083 



Terraces, of Champlain period, 981, 

 985, 986, 991* 



Terrane, 90§ 



Terranes, 61§, 89§-116; stratified, 

 90; unstratified, 116 



Terrestrial life rarely fossilized, 141, 

 525 



Terrigenous, 144§ 



Terror, Mt., height of, 296 



Tertiary era, 188, 202, 339, 847, 350, 

 364-366, 380, 381, 892, 40T, 408, 

 409*, 411, 822, 828, 829, 831, 857, 

 879 ; subdivisions, 880 ; N. Amer- 

 ica, 880 ; foreign, 919 ; general 

 observations, 928 ; Tertiary ele- 

 vation continued into Glacial 

 period, 946. See also Miocene ; 

 Pliocene 



— eruptions, 876 ; in western Amer- 

 ica, 340 ; igneous outflows in the 

 Deccan, 299 



— fresh-water lakes of N. America, 

 202, 882 



— mountain-making, foreign exam- 

 pies of, 367-369, 769, 812; oro- 

 genic and epelrogenic move- 

 ments, 932-939 ; orographic move- 

 ments along the Pacific mountain 

 border, 364-366 



Teschenyte, 88§ 

 Testudinates, 767, 901* 

 Testudo, 901; Atlas, 923; bron- 

 tops, 901*, 902 ; Stricklandi, 787, 

 790 



Tetrabranchs, 424§, 425*, 781, 869 

 (pass their climax) 



Tetracoralla, 431 §, 718 



Tetractinellids, 431§, 4:32* 



Tetradecapods, 420§*, 421, 423§, 

 438§, 439, 525, 574, 707, 720, 721, 

 724, 725 



Tetradium, 501, 505 ; ceUulosum, 

 515 ; columnare, 514 ; fibratum, 

 511*, 515 



Tetragraptus bryonoides, 500 ; fru- 

 ticosus, 500 



Tetrahedrite, 335 



Tetrapterus prisons, 925 



Texas, mean height of, 23 ; Archaean 

 in, 444, 446, 447 ; Cambrian, 464, 

 466, 469, 477, 484; Upper Silu- 

 rian, 537 ; Devonian, 575, 580 ; 

 Subcarboniferous, 637 ; Carbonif- 

 erous, 648, 690, 693 ; Permian, 

 660, 685, 687, 688; Triassic, 

 660, 746; Cretaceous, 817, 824, 

 854 ; disturbances in, 868 ; Ter- 

 tiary, 884, 885, 888 ; Quaternary, 

 878 



Textularia, 855 ; globulosa, 432* 



Thalassic, 535§ 



Thalassophyllum clathrus, 582 



Thames Pviver, Conn., 461, 949 



Thames Eiver, Eng., 191 



Thamnastreea, 777, 778 (number of 

 British) ; concinna, 790 ; gre- 

 garia, 790 



Thanet sands, 920, 925 



Thanetian group, 925 



Theca, 481, 514, 521, 707 ; parvius- 

 cula, 514, 516 



Thecidium family, 779 



Thecodontosaurus, 773 ; gibbidens, 



754 

 Thecodonts, 754§ 

 Thecosmiha, 777, 778 (number of 



British) ; annulata, 790 

 Thelodus parvidens, 566*, 567 

 Tlielyphonus, 723 

 Thenaropus heterodactylus, 692 

 Thermal waters, 258, 305-309, 334, 



335 

 Theromora, 688 

 Theromores, 707 

 Thian-Shan Mts., 32 

 Thick-bedded structure, 92§ 

 Thielson, Mt., 266 

 Thimble Islands, degradation at, 



260 ; pot-holes of, 949 

 Thinohyus, 911, 918 

 Thinohte, 133* 

 Thoracosaurus, 848 

 Thorium, 449 

 Thracia Conradi, 983; curta, 984; 



depressa, 791 

 Thrissops, 417* 

 Thrust-planes, 534 

 Thuia, 840 



Thuringia, Permian in, 706 

 Thuyites, 777 

 Thysanura, 419, 702 

 Thysetes verrucosus, 567 

 Tiaropsis, 429* 

 Tibet, 26, 32; Silurian of, 368; 



Triassic in, 770 ; Jurassic, 791 ; 



folded Nummulitic beds of, 521, 



920 ; Mammals of, 936 

 Tiburtine, 79§ 



Ticholeptus beds, 886, 894, 895 

 Tick, 420 

 Tidal wave and currents, 43, 210 ; 



on Lake Michigan, 202 

 Tide and currents in the Cambrian, 



484 ; Devonian, 629, 680 

 Tierra del Puego. See Puegia 

 Tile clay, 665 

 Tile-fish, 56 

 Tilestones, 563, 566 

 Tilibiche, coral limestone at, 347 

 Till. 81§, 251§ 



Tillodonts, 903, 904, 917, 918 

 Tillotherium, 904, 918; fodiens, 



904*, 905 ; latidens, 904*, 905 

 Timber Belt beds, 888 

 Time, geological, subdivisions of, 



404 ; ratios and length, 1023 

 Timpahute Range, 366*, 469 

 Tin, 83, 88, 336, 343 

 Tinacoro Island, 296 

 Tinoceras, 907§, 918; anceps, 907; 



grandis, 907 ; ingens, 906*, 907 

 Tinodon bellus, 767* 

 Tionesta basin, 947 

 Tipula Carolina", 900* 

 Tipulidffi, 900 

 Tirolanus Cassianus, 773 

 Tisiphonia, 432* 



Titanic acid, 86 ; iron, 70§, 449, 450 

 Titanichthys, 618 ; Clarki, 619 

 Titanite, 67§ 

 Titanium, 70, 455 

 Titanophasma Fayoli, 701, 702* 

 Titanosaurus, 867 

 Titanotheres, 907, 908, 909, 918 



Titanotherium anceps, 907 ; gigan- 



teum, 908*, 909 

 Titanotherium beds, 886, 893, 908, 



910, 918 

 Tithonian group, 779, 791 

 Titicaca, Lake, 26, 347, 627 

 Toarcian group, 775 ; (Upper), 790 

 Tcedi-Windga'Uen group of moun- 

 tains, 367 

 Tofua Island, 296 

 Toluca, Mex., 265 

 Tom, Mt., 802; Ridge, 801*, 803, 



804, 805, 806, 807 

 Tombigbee River, 885, 889 ; sands, 



815, 823, 854 

 Tomitherium, 918 

 Tonga Islands, 37, 350, 374 

 Tongrian group, 884, 926 

 Tongue River, 266 

 Tonto group of Gilbert, 447, 469 

 Topaz, 63, 66*§, 338 

 Topazolites, 312 

 Torbanite, 662 

 Tornoceras mithrax, 591 

 Torosaurus, 847 ; gladius, 846* 

 Toroweap fault, 362, 363* 

 Torre del Greco, 294 

 Torres Strait, 937 

 Torrid zone, 46§ 

 Torridonian group, 457 

 Torsion, 105, 106*, 107, 371 ; effects 



of, in ice, 871, 872* ; in strata, 



105, 106*, 371 

 ^as an explanation of the zigzag 



arrangement of continents, 394, 



895 

 Tortoises, 787 

 Tortone blue marls, 926 

 Tortonian group, 884, 926 

 Totoket Ridge, 801*, 802, 803, 806 

 Toucan, 54 

 Touraine, 926 

 Tourmaline, 63, 66*§, 82, 88, 160, 



312, 320 ; crystals displaced by 



quartz, 188* ; rocks, 82, 83 

 Tourmalyte, 88§ 

 Toxaster Campicheii, 865 ; compla- 



natus, 865 

 Toxoceras bituberculatum, 862*, 865 

 Toxodon, 927 

 Toyabe Range, 365 

 Tracheates, 419§ 

 Trachelomonas laevis, 163, 164* 

 Trachodon mirabilis, 846 

 Trachyceras, 756 ; aonoides, 774 ; 



Archelaus, 774 ; balatonicum, 774 ; 



binodosum, 774 ; Canadense, 758 ; 



Curionii, 774 ; Eeitzi, 774 ; trino- 



dosum, 774 ; Whitnej-i, 757* 

 Trachyte, 80, S4§, 86 ; difference in 



density of glass and stone states 



of, 265 ; relation to granite, 814 

 Tracks. See Footprints 

 Trade winds, 50, 51, 159, 166 

 Trails. See Footprints 

 Transition rocks, 408§ 

 Translation-waves, 218 

 Trans-Pecos region, 824, 874 

 Transportation by currents of 



water, 169, 189 



— by glaciers, 247 ; by waves, 222 



— of, and by, plants and animals, 156 



