INDEX 



975 



Strike, 400 

 Strike fault, 65 

 Strobilops labyrinthica, 889 

 Stromatopora, 578 



delicatula, 529 

 Strophepdonta concava, 581 



magnifica, 578 



profunda, 550 . 

 Strophomena sub'tenta, 528 

 Strophonella punctulifera, 576 

 Strotospongia maculosa, 533 

 Structural adjustment, 163 

 Structural geology, 1 

 Structural valley, 120 

 Structure and erosion, 150 

 Stump in Coal Measures, 632 

 Subaerial formations (see Terres- 

 trial formations) 

 Sub-Aftonian glacial epoch, 874 

 Sub-Carboniferous period, 596 

 Subglacial debris, 258 



load, 251 



Submerged valleys, 294, 836/933 

 Submergence, causes of, 479, 480 

 Subulites regularis, 526 



ventricocus, 551 

 Succession of faunas, 504 



ice invasions, 874 

 Succinea avara, 889 

 Succinea obliqua, 889 

 Suina, Eocene, 790 

 Sulphur, 81 

 Sun-cracks, 322, 397 

 "Sunflower coral," 554 

 Superficial deformation, 479 

 Superglacial debris, 258 



load of glaciers, 251 

 Surcula biscatenaria, 826 

 Surface moraines, 242 

 Swamps, conditions for, 636 

 Swauk formation, 778 

 Syenite,. 29, 60, 87 

 Syncline, 401 * 



Synclinoria, 403 

 Syringppora, 552 



verticillata, 552 



Taconic Mountains, 515, 516 

 Taff, J. A., 568, 606, 624 

 Tait, P. G., 363 

 Takakrow Falls, 241 

 Talc, 81 



Talchir conglomerate, 667 

 Talcose rocks, 50 

 Talus deposits, 142, 910 



Tapirs, Miocene, 823 



Tarr, R., 172, 873 



Tasmania, Permian glacial deposits 



of, 6(16 



Taylor, F. B., 891, 893, 912 

 Teleosts, 768 

 Tellina producta, 825 

 Telluride formation, 777 

 Temnpcheilus forbesianus, 658 

 Temnospondyli, 653 

 Temperature and rock breaking, 103 

 ' of glaciers, 247 



of ocean, 326 



a factor in climate, 521 

 Temporary base-levels, 129 

 Terebra unilineata, 826 

 Terebrajula, 700 



humboldtensis, 700 

 Terminal moraines, 242, 243, 260, 266, 

 270, 271, 865, 866 



topography, 857 

 Terrace, wave-built, 314 



wave-cut, 306 

 Terraces of streams, 191 

 Terrestrial aggradation, 833 



formations of Tertiary age, 772 



organic deposits, 900 

 Terrigenous deposits in sea, 317, 326 

 Tetrabelodon angustidens, 819 

 Tetragraptus bigsbyi, 531 



fruticosus, 531 

 Tertiary period, 772 

 Texas, oil in, 746, 807 

 Textularia subangulata, 795 

 Thalattosaurs, 701 

 Thames, mineral matter in, 204 

 Thamnastrsea prolifera, 714 

 Thecosmilia trichotoma, 714 

 Thermal spring, 212 

 Theropoda, 693, 762 

 Thickness of formations, modes of 



estimating, 461 



Thickness of sedimentary beds, 462 

 Thompson, J., 287, 289 

 Thorofares, 314 

 Throw, 409 



Thrust faults, 62, 411, 520, 754 

 Thrust in glacier motion, 281, 285 

 Tibetan plateau, 358 

 Tides, scour of, 314 

 Tight, W. G., 873 

 Till, 87, 852,865 

 Tillotherium, 792 



fodiens, 793 

 Tin ores of Malay, 71 



