INDEX. 



619 



Streams, transportation by, i, 

 ii5» n6 



velocity of, i, 115 



young, i, 85 

 Stream-terraces, i, 204-212 

 Stream velocity, effect on trans- 

 portation, i, 115 

 Stream work, i, 57-212 

 Streptelasma corniculum, ii, 361 

 Streptis, ii, 411 



grayi, ii, 403 

 Stress-accumulation, i, 583, 588 

 Stria?, i, 283 



Striation, glacial, iii, 346 

 Strike, i, 501 

 Strike fault, i, 522 

 Strobilops labyrinthica, iii, 410 

 Stromatopora, ii, 361, 457 



delicatula, ii, 358 

 Stromboli, i, 636 

 Stropheodonta, ii, 464, 478 



concava, ii, 462 



magnifica, ii, 458 



profunda, ii, 403 

 Strophomena, ii, 456 



subtenta, ii, 356 

 Strophonella punctulifera, ii, 455 

 Strotospongia maculosa, ii, 363 

 Structural adjustment of valleys, 



i, 147 

 Structural features of rocks, i, 

 486-525 



arising from disturbance, i, 

 500 

 Structural geology, i, 1, 486 

 Structural valleys, i, 77 

 Structure of earth on nebular 

 hypothesis, ii, 133 



on planetesimal hypothesis, ii, 

 133 

 Structure of glacier ice, i, 308 



of igneous rocks, i, 498 



of rock, influence on erosion, 

 i, 125 



of sedimentary rock, i, 486 

 Struggle for existence among 



valleys, i, 100 

 Stuart shale, iii, 562 

 Sturgeon quartzite, ii, 179. 180 

 Styliola, ii, 473 

 Subaerial erosion, i, 58 

 Sub-Aftonian drift, iii, 383, 387 

 Sub-atomic forces, causes of 



crustal movement, i, 556 

 Sub-Carboniferous period, ii, 



496 (see Mississippian) 

 Subdivisions of geology, i, 1 

 Subglacial load, i, 282 

 submerged channels, iii, 521 



valleys and tidal action, iii, 528 

 Sub-oceanic and continental sec- 

 tors, ii, 123 

 Subsidence, effect on coast-lines, 



i, 33i 

 Subulites regularis, ii, 353 



ventricosus, ii, 403 

 Succession of faunas, Cambrian, 

 ii, 294 



Ordovician, ii, 364 

 Succinea avara, iii, 410 



Succinea obliqua, iii, 410 

 Suess, E., cited, i, 538; ii, 129, 



589 

 Sugarloaf arkose, iii, 546 

 Suina, iii, 236 

 Sulphur, i, 466 

 Sulphur Creek formation, iii, 



313 

 Sulphur springs, i, 235 

 Sunbury shale, ii, 500, 560; iii, 



554 

 Sun-cracks, i, 373, 490 

 Sundance formation, iii, 565, 566 

 Sunderland formation, iii, 450 

 Superglacial load, i, 282 

 Superimposed streams, i, 150 

 Surcula blscatenaria, iii, 294 

 Surface moraines, i, 266 

 Surface temperature on planet- 

 esimal hypothesis, ii, 69 

 Susquehanna River, i, 168 

 Swauk formation, iii, 210, 211, 



578 

 Sweden, Archean of, ii, 159 

 Proterozoic of, ii, 215 



iron ore in, ii, 216 

 Triassic of, iii, 34 

 Swedenborg, E., cited, ii, 4 

 Sweet, E. T., cited, iii, 367 

 Sweetland creek shales, iii, 558 

 Switzerland, Miocene of, iii, 276 

 Oligocene of, iii, 250 

 snow-fields of, i, 245 

 Triassic of, iii, 36 

 Sycamore limestone, ii, 511 

 Syenites, i, 415, 452, 473 

 Sylamore sandstone, ii, 562; 



iii, 560 

 Sylvan shale, iii, 563 

 Symborodon, iii, 255 

 Synapsida, ii, 647, 649; iii, 42 

 Synbathocrinus wortheni, ii, 525 

 Syncline, i, 157, 504 

 Synclinoria, i, 504 

 Syndyoceras cooki, iii, 256 

 Syringopora, Silurian, ii, 407 



verticillata, ii, 406 

 Syringothyrls subcuspidatus, ii, 



525 

 Syssiderites, i, 5 

 Systemodon, iii, 235 



Tachylite, i, 473 



Taconic mountains, folding of, 



ii, 333 

 Ordovician of, ii, 326 

 Taconic system, ii, 335 

 Taeniaster cylindricus, ii, 359 

 Taeniopteris, ii, 643 



newberriana, ii, 643 

 Taff, J. A., cited, ii, 209, 224, 



308, 321, 435. 504, 5ii, 



543.548; iii, 115, 560, 562; 



(and Brooks), 548 

 Tait»P. G., cited, i, 552,572,573; 



(and Thompson), 560, 579 

 Talc, i, 466 



Talchir formation, ii, 634 

 Talcose rock, i, 431 

 Talus, i, 112 



Talus, and alluvial deposits, iii, 

 472 

 cone, i, 182 



glaciers, i, 232, 233; iii, 474 

 Tancredia bulbosa, iii, 92 

 Taneum andesite, iii, 267 

 Tapirs, Miocene, iii, 289 



Pliocene, iii, 322 ; 323 

 Tarr, R. S., cited i, 165; iii, 



382, 479 

 Tasmania, Cambrian fossils of, 



ii, 300 

 Taylor, F. B., cited, iii, 397, 401, 

 402, 404, 414, 415, 416, 419 

 482; (and Leverett), 396 

 Taylor formation, iii, 142, 143 

 Tdamnastraga prolifera, iii, 84 

 Tealoresco, E. C, cited, ii, 605 

 Teanaway basalt, iii, 211, s"^ 

 Tejon formation, iii, 203, 317 

 Teleorhinus, iii, 178 

 Teleosaurs, Jurassic, iii 100 

 Teleostomi, ii, 401 

 Teleosts, Cretaceous, iii, 185 



Jurassic, iii, 8-5 

 Tellico sandstone, 11,516, iii, 549 

 Tellina, iii, 295 



(Angulus) producta, iii, 292 

 Telluride formation, iii, 207, 572 

 Telotremata, ii, 356 

 Temnospondyli, ii, 607, 609; 



iii, 42 

 Temperature and CO2 of ocean, 

 ii, 667 

 at center of earth, i, 571 

 atmospheric, i, 43 , 46, 49 

 based on Laplace's law, i, 546 

 developed by infall of plare- 



tesimals, ii, 68 

 effect on erosion, i, 129 

 effects of changes on rocks, i, 



44 

 expansion and contraction due 



to changes of, i, 44 

 in excavations, i, 569 

 of interior of earth, i, 559-570 

 of lavas, i, 615, 627 

 of surface on planetesirral 

 hypothesis, ii, 69 

 Temple Butte limestone, iii, 574 

 Tennessee, Devonian phosphates 

 of, ii, 440 

 Ordovician phosphates of, ii, 



337 

 river, history of, i, 168-169 

 section of strata in, iii, 549, 

 550, 552 

 Tension joints, i, 514 

 Tensional movements, origin of 



ii, 131 

 Tentaculites, ii, 478 

 Terebra, iii, 294 



unilineata, iii, 294 

 Terebratella pllcata, iii, 189 

 Terebratula, ii, 472; iii, 52, 57 

 91 

 harlani, iii, 189 

 humboldtensis, iii, 53 

 Terebratulacea, iii, 134 

 Terebratuloids, Triassic, iii, 57 



