INDEX. 



617 



Shaler, N. S., cited, i, 227, 349, 

 357; (and Davis), 256; ii, 

 544, 549J i"» 37o; (and 

 Woodworth), 8, 10, 15, 17, 

 18 

 Shallow-water deposits, i, 368, 

 369, 379 



characteristics of, i, 373 



topography of, i, 374 

 Shark River marl, iii, 198 

 Sharks, Devonian, ii, 461, 469, 

 489 



Miocene, iii, 294 



Mississippian, ii, 535 

 Sharon conglomerate, ii, 557 

 Shastan system, iii, 107, 108, 122 

 Shaw, J., cited, iii, 370, 411 

 Shawangunk grit, ii, 370, 372 



mountains, ii, 371 

 Shear zone, subcrustal, ii, 126 

 Shearing of glacier ice, i, 317 

 Sheet erosion, i, 59 

 Shell marl, i, 655 

 Shenandoah limestone, iii, 548 

 Shepard, E. M., cited, ii, 424 

 Sherzer, W. H., cited, ii, 424 

 Shimek, B., cited, iii, 409, 411, 



412 

 Shinarump formation, iii, 313 

 Shore currents, i, 342 



deposition by, i, 355 

 Shore deposition and coastal con- 

 figuration i, 363 

 Shore drift, i, 355 

 Shore ice, i, 389 

 Shoshone Falls, i, 135 

 Shumard, B. F., cited, ii, 561 

 Siamo slate, ii, 150, 179 

 Siberia, Ordovician of, ii, 342 

 Siderite, i, 425, 466 

 Siebenthal, C. E., cited, ii, 54 

 Sierran Period, iii, 311 

 Sigillaria, Carboniferous, ii, 598, 

 599, 603 



Devonian, ii, 493 



Mississippian, ii, 537 



Permian, ii, 642 



Triassic, iii, 39 

 Silicified wood, i, 439 

 Siliceous deposits, i, 425 

 Sills, i, 446, 592 

 Silurian Mastoids, ii, 400, 403 



brachiopods, ii, 401, 403 



bryozoans, ii, 405, 406 



cephalopods, ii, 403, 405 



ceratiocarids, ii, 408 



chain coral, ii, 407 



climate, ii, 396 



close of, ii, 395 



coral development, ii, 407 



coral reefs, ii, 407 



corals, ii, 406 



crinoids, ii, 400, 403 



crustaceans, ii, 408 



cystoids, ii, 401, 403 



echinoderms, ii, 400 



echinoids, ii, 401 



fishes, ii, 409, 417 



foreign, ii, 395 



gastropods, ii, 403, 406 



Silurian graptolites, ii, 408 

 halysites, ii, 407 

 in the West, ii, 390 

 life, ii, 396 



marine plants, ii, 409 

 ostracodes, ii, 408 

 pelecypods, ii, 403, 406 

 Silurian Period, ii, 368 

 Silurian pteropods, ii, 407 

 sponges, ii, 408 

 starfishes, ii, 401 

 system, subdivisions of, ii, 370 

 trilobites, ii, 403, 408 

 Silverton series, iii, 572 

 Simiidae, iii, 289 

 Simcedosaurus, iii, 181 

 Simpson series, iii, 563 

 Sioux quartzite, ii, 173, 205; 



iii, 559 

 Siphonalia marylandica, iii, 294 

 Sirenia, iii, 229 

 Sivatherium, iii, 323 

 Siwalik formation, iii, 300 

 Skertchly, S. B. J., cited, i, 23; 

 iii, 516; (and Kingsmill), 

 407, 424 

 Slate, i, 473 

 Slaty structure, i, 441 

 Slichter, C. S., cited, i, 221, 563, 



576 

 Slickensided surfaces, meteorite, 



ii, 26 

 Sloths, Pleistocene, iii, 498 



Pliocene, iii, 321, 322 

 Slumps, i, 231 

 Smaragdite, i, 466 

 Smilodon, iii, 325 

 Smith, E. A., cited, i, 543; iii, 

 in, 132, 141, 142, 199, 

 244, 262; (and Aldrich),iii, 

 200, 244, 309; (and John- 

 son), iii, 302 

 Smith, G. O., cited, ii, 395, 555; 

 iii, 210, 211, 212, 214, 

 266, 267, 271, 315, 316,578; 

 (and Willis), iii, 315 

 Smith, J. H., cited, iii, 205 

 Smith, J. P., cited, ii, 639; iii, 



50, 52, 63, 69, 91, 310 



Smith, W. S. T., cited, ii, 209, 



505; iii, 481, 565; (and 



Darton), 66, 120, 121, 566 



Smith River beds, iii, 568 



Smock, J. C, cited, iii, 14, 357; 



(and Cook), 367 

 Smyth, W. S., cited, ii, 149, 178, 



179, 180 

 Snakes, Cretaceous, iii, 178 

 Snow, work of, i, 244 

 Snow-fields, i, 244 



distribution of, i, 244 

 Snowflakes, forms of, i, 310 

 Snow-line, i, 245 

 in Andes, i, 246 

 in Antarctica, i, 246 

 in Greenland, i, 246 

 in Himalayas, i, 246 

 Soapstone, i, 431, 473 

 Sodipotassic rocks, i, 458 

 Solar nebula, origin of, ii, 51 



Solarium trilineatum, iii, 294 

 Solenhofen limestone, iii, 75 

 Solidity of earth, astronomical 



argument for, ii, 7 

 Solms-Laubach, cited, i, 652 

 Solution, by ground-water, i, 222 



by rivers, i, 108, 122 

 Solution of rocks, i, 427 

 Solvent action, location of, i, 



480 

 Sorby, H. C, cited, i, 367 

 Soudan formation, ii 150 

 Source of streams, i, 178 

 South Africa, Permian of, ii, 635 

 South America, Cambr.'an of, ii, 

 272 

 Cretaceous, Lower, iii, 129 

 Cretaceous, Upper, iii, 171 

 Devonian of, ii, 448 

 Eocene of, iii, 219 

 Jurassic of, iii, 78 

 Miocene of, iii, 281 

 Mississippian of, ii, 517 

 Oligocene of, iii, 252 

 Pennsylvanian of, ii, 591 

 Permian of, ii, 638 

 Pleistocene life of, iii, 500 

 Pliocene life of, iii, 321 

 Proterozoic of, ii, 215 

 Triassic of, iii, 37 

 South American mammals, Pleis- 

 tocene, iii, 498 

 Southall, cited, iii, 415, 516 

 Southern Hemisphere, Pleisto- 

 cene life of, iii, 500 

 Spacing out of planets, ii, 78-80 

 Spatangus, iii, 294 

 Spatter-cones, i, 609, 610 

 Spearfish beds of South Dakota, 

 iii, 25, 566 

 sandstone, iii, 565 

 shale, iii, 68, 566 

 Specific heat of rock, i, 552 

 Spencer, A. C, cited, ii, 435; 



iii, 203 

 Spencer, J. W., cited, iii, 312, 

 382, 415, 419, 482, 521, 522 

 Spermatophytes, Devonian, ii 

 493 

 geologic contribution of, i, 657 

 Sphaerexochus mirus ii,403 

 Sphaeroceras, iii, 91 

 Sphenophyllales, Carboniferous, 

 ii, 597, 598 

 Devonian, ii, 493 

 Mississippian, ii, 537 

 Sphenophyllum, i, 657; ii, 602 

 Devonian, ii, 493 

 longifolium, ii, 597 

 Permian, ii, 643 

 Sphenopteris, ii, 595, 602, 643 

 Mississippian, ii, 537 

 splendens, ii, 593 

 Sphere of activity, ii, 62 

 Sphericity, a factor in deforma- 

 tion, i, 580 

 Spherosiderite, i, 466 

 Sphinx conglomerate, iii, 210 

 Spiders, Carboniferous, ii, 611 

 Spinel, i, 466 



