610 



INDEX. 



Sand, eolian, i, 26-37 

 Sandstone, i, 422, 434, 472 



crushing strength of, ii, 127 



stratification of, i, 487 

 Sandstone dikes, i, 514 

 Sandsuck shale, iii, 550 

 Sangamon interglacial forma- 

 tion, iii, 494 

 Sangamon interglacial stage, iii, 



391 

 Sanidine, i, 466 

 Santa Cruz beds, iii, 281 

 Santa Gruz mountains, Pliocene 



movement in, iii, 316 

 Santa Margarita formation, iii, 



3io, 577 

 Santee formation, iii, 199 

 Saportea, ii, 643 



salisburioides, ii, 643 

 Sapping, i, 127, 133 

 Saratogan series, ii, 219 

 Sardeson, F. W., cited, ii, 302, 



357 

 Sarle, C. J., cited, ii, 376 

 Sassafras, iii, 132, 133, 173 



subintegrifolium, iii, 174 

 Satellites of Neptune, ii, 71 



of Uranus, revolution of, ii, 71 

 Satinspar, i, 466 

 Sauropoda, iii, 97 

 Sauropterygia, ii, 649; iii, 42 



Triassic, iii, 45 

 Saurians, Cretaceous, iii, 180 



marine, Cretaceous, iii, 180 

 Sauropus, Mississippian, ii, 537 

 Savannah sandstone, iii, 562 

 Savoy schist, iii, 546 

 Sawatch quartzite, ii, 154; iii, 



57i 

 Saxicava, iii, 295 



jurassica, iii, 92 



sands, iii, 494 

 Saxonian epoch, iii, 421 

 Scala potomacensis, iii, 243 



sayana, iii, 294 

 Scandinavia, Ordovician, ii, 338 



Triassic coal-beds of, iii, 41 

 Scanian epoch, iii, 421 

 Scapharca, iii, 292, 295 

 Scaphella, iii, 294 

 Scaphites nodosus, iii, 189 

 Scaphopod, Miocene, iii, 294 

 Scarboro formation, iii, 491 

 Schist, i, 446, 472 



series of Archean, ii, 142 

 Schistosity, i, 443 

 Schizocrania filosa, ii, 356 

 Schizodus chesterensis, ii, 533 



wheeler i, ii, 616 

 Schizolepis liaso-keuperinus, iii, 



41 

 Schizolopha textilis, ii, 353 

 Schizoneura, ii, 646 



gondwanensis, ii, 645 

 Schizophoria multistriata, ii, 455 



striatula, ii, 475, 476 



swallovi, ii, 525 

 Schizotreta fissus, ii, 356 



ovalis, ii, 356 

 Schlaenbachia, iii, 134 



Schloesing, cited, ii, 666 

 Schmidt, J. F. J., cited, i, 537 

 Schoharie Creek, i, 105 

 Schoharie grit, ii, 424 

 Schrader, F. C, cited, ii, 436; 

 iii, 124, 125, 161, 248, 299; 

 (and Mendenhall), iii, 124 

 Schuchert, C, cited, ii, 221, 225, 

 ii. 39i. 458; (and Clarke), 

 ii. 310, 370, 420; (and Ul- 

 rich), 250, 312, 32 1, 344, 41 1, 

 427, 432; (and White), iii, 

 124, 132 

 Schwarz, E. H. L., ii, 273-448, 



636 

 Sciurus, iii, 253 

 Scoriae, i, 405, 473 

 Scorpions, Carboniferous, ii, 611 

 Devonian, ii, 490, 495 

 first appearance of, ii, 415 

 Scotland, overthrust in, ii, 341 

 Scott, E. H., cited, ii, 493, 505, 



596, 601 ; iii, 39 

 Scott, W. B., cited, ii, 294; iii, 



119, 223, 228, 255, 269 

 Scott shale, iii, 549 

 Scour-and-fill, i, 194 



of Missouri river, i, 195 

 Scrope, G. P., cited, i, 636 

 Scudder, S. H., cited, ii, 494, 610 

 Scutella, iii, 294 

 Sea, the (see Ocean) 

 Sea-caves, i, 350 

 Sea-cliffs, i, 349 

 Sea-urchins, Cretaceous, iii, 186 



Jurassic, iii, 84 

 Sea-water, aperiodic movements 

 of, i, 338 

 movements, i, 334-342 

 movements generated by at- 

 traction, i, 337 

 salts in, i, 376, 377, 378 

 Sea-waves, caused by earth- 

 quake, i, 535 

 Secondary rocks, derivation of, i, 



420 

 " Second bottoms," i, 205 

 Secret Canyon shale, iii, 576 

 Secretions, i, 497 

 Section of strata, in Alabama, 

 iii, 55i 

 Arizona, iii, 575 

 Arkansas, iii, 560 

 Black Hills, iii, 566 

 California, iii, 577 

 Colorado, iii, 570, 572 

 Eureka District, Nevada, iii, 



576 

 Grand Canyon region, iii, 574 

 Indian Territory, iii, 562 

 Indiana, iii, 556 

 Iowa, iii, 558 

 Massachusetts, iii, 546 

 Michigan, iii, 553 

 Montana, iii, 568 

 Nebraska, iii, 564 

 Ohio, iii, 554, 555 

 Tennessee, iii, 549. 55°, 552 

 Virginia, iii, 548 

 Washington, iii, 578 



Section of strata, in West Vir- 

 ginia, iii, 548 

 Wyoming, iii, 565 

 Sections of the Huronian, ii, 

 179 

 of Ordovician in interior, ii, 

 319 

 Secular changes of temperature, 

 and COv of ocean, ii, 668 

 Sederholm, j. J., cited, ii, 159, 



215 

 Sediment, of the Danube, i, 107 

 of the Irrawaddy, i, 107 

 of the Mississippi, i, 107 

 of the Nile, i, 107 

 of the Po, i, 107 

 of the Potomac, i, 107 

 of the Rhone, i, 107 

 of the Rio Grande, i, 107 

 of the Uruguay, i, 107 

 character of, influenced by 



land vegetation, i, 645 

 deposited by rivers, i, 65, 177- 



204 

 deposited in lakes, i, 387 

 deposited in sea, i, 368-386 

 effect on falls, i, 137 

 how carried by streams, i, 116 

 Sedimentary eon, ii, 91 

 Sedimentary rocks, classes of, i, 

 422 

 structural features of, i,486 

 Sedimentation, Cambrian, ii, 

 246 

 Ordovician, ii, 304 

 Sedimentation and continental 



creep, ii, 132 

 Sedimentation and vulcanism, i, 



629 

 Seed-plants, i, 657 

 Seeley, H. G., cited, iii, 170 

 Seeley, H. M., (and Brainard,) 



cited, ii, 364 

 Segregation of ores, i, 475 

 Seiches, i, 386 



Seine river, intrenched mean- 

 ders of, i, 164 

 Selective fusion, ii, 102 

 Selenite, i, 466 

 Selma chalk, iii, 141, 142 

 Seminole conglomerate, iii, 562 

 Seminula, ii, 531 



argentea, ii, 616, 617 

 subquadrata, ii, 532 

 Semnopithecus, iii, 325 



maurus, iii, 326 

 Senecan series, ii, 432 

 Senora formation, iii, 562 

 Septa, iii, 295 

 Septaria, i, 473. 495 

 Septastrea, iii, 294 

 Sequoias, Cretaceous, iii, 173 

 Serpentine, i, 431, 466, 473 

 Serpentine kames, i, 306 

 Sevier shale, ii, 316; iii, 549 

 Sewell formation, ii, 559 

 Seward, A. C, cited, i, 652; ii, 



598 

 Shakopee limestone, iii, 559 

 Shale, i, 422, 434, 473 



