688 



INDEX 



Archean continued 



rocks, 316, 317 



schists, 318 

 Archaecyathus minganensis, 386 



rensselaericus, 362 

 Archaeocrinus desideratus, 384 

 Archeozoic eon, 308 

 Archeozoic era, 314 



climate of, 324 



duration of, 324 



life of, 324 

 Archimedes, 438 



swallovanus, 437 

 Archinacella cingulata, 381 

 Argillite, 292 



Arid regions, erosion in, 83 

 Aridity, Permian, 470 



Silurian, 392, 393 

 Arietidae, 508 

 Arikaree formation, 588 

 Aiistozoae rotundata, 359 

 Arkose, 266 

 Arnold, R., cited, 558, 574, 583, 604, 



611 



Artefac, 670 

 Artesian wells, 52 



Arthracantha punctobrachiata, 419 

 Arthrodirans, 418, 422 

 Arthrolycosa antiqua, 466 

 Artiodactyls, 568 

 Ashley, G. H., cited, 607, 661 

 Asia, Cambrian in, 356 



Carboniferous in, 457 



Cretaceous in, 527, 544 



Devonian in, 412 



Jurassic of, 507 



Miocene of, 590 



Ordovician in, 376 



Pennsylvanian in, 457 



Permian in, 474 



Triassic in, 492 

 Astarte calif ornica, 531 



thomasii, 595 

 Asteroids, 2 

 Astral eon, 307 

 Astresius liratus, 531 

 Athyris lamellosa, 435 

 Atlantic coast, submergence of, 171 

 Atmosphere, 4 



beginning of, 310 



composition of, 4 



thermal effects of, 28 



under nebular hypothesis, 309 



work of, 1 2-29 

 Atrypina imbricata, 414 



Aucella crassicollis, 531 



mosquensis, 510 



piochii var. orata, 531 

 Augite, 255 

 Augitite, 260 

 Augusta series, 426, 427 

 Aurochs, 675 

 Australia, Cambrian glacial beds in, 



357 



Carboniferous in, 457 



coal in, 457 



Cretaceous in, 527, 545 



glacial Permian in, 474 



Miocene of, 590 

 Autoclastic rocks, 295 

 Aviculopecten occidentalis, 469, 481 

 Azoic eon, 307 



Baculites, Cretaceous, 555 



grandis, 554 

 Bad lands, 83, 85, 576 

 Bain, H. F., cited, 429 

 Ball, Sir Roht., cited, 649 

 Barker, A. S., cited, 167 

 Barnacles, 418 

 Barrier, 184 

 Bars, 186, 187 

 Barus, Carl, cited, 33 

 Barycrinus hoveyi, 434 

 Basal conglomerate, 328 . 

 Basalt, 260, 262 

 Base-level, 66, 68, 69 

 Base-leveled plain, 68 

 Basement complex, 319 

 Basic rocks, 252 

 Bastin, E. S., cited, 642, 666 

 Batholiths, 228 

 Batocrinus, 434 

 Bays sandstone, 369 

 Beach, 184 



Beadnell, H. J. L., cited, 19 

 Becraft limestone, 402 

 Beekmantown limestone, 368 

 Belemnites, 509 



densus, 512 

 Bellerophon clausus, 381 



percarinatus, 469 



sublaevis, 437 

 Berry, E. W., cited, 611 

 Betulites westi, var. subintegrifolius, 



547 



Bifidaria armifera, 644 

 corticaria, 644 

 muscorum, 644 

 pentodon, 644 



