950 



INDEX 



Bozeman formation, 812 

 Bowlder clay, 87, 852 

 Bowlders, 82 

 Brachiopods, Cambrian, 497 



Chemung, 588 



Hamilton, 584 



Helderbergian, 577 



Jurassic, 715 



Kinderhook, 607 



Onondagan, 580 



Ordovician, 528 



Oriskany, 578 



Osage, 610 



Pennsylvanian, 657 

 Brachiopods, Permian, 676 



Silurian, 548, 550 



Spergen Hill, 615 



Triassic, 700 



Waverly, 611 

 Brachiosaurus, 721 

 Brachiospongia digitata, 533 

 Branchiosaurs, 653 

 Branner, J. C., 397, 516, 783 

 Brazil, coal in, 643 (see also South 



America) 

 Breakers, 298 

 Breccia, 36, 82 

 Bridger Range, 472 

 Bridger stage of Eocene, 777 

 Bridgeton formation, 901 

 British Columbia, Triassic fauna of, 



699 



Brongiart, C. H., 654 

 Brontosaurus, 720, 721 

 "Bronze age," 924 

 Brooks, A. H., 569, 629 

 Brooksella alternata, 500 

 Broom, R., 673 

 Brown coal, 84, 635 

 Brown hematite, 78 

 Brown Jura, 709 

 Brule formation, 797 

 Bryozoan reefs, 538 

 Bryozoa, Ordovician, 529, 530 



Osage, 610 



Pennsylvanian, 657 



St. Louis, 615 



Silurian, 550, 552 

 Buchanan, R., 330 

 Buchanan interglacial interval, 874 

 Buckley, E. R., 201, 226 

 Buffaloes, Pleistocene, 920 

 Buhrstone, 82 

 Bumastus trentonensis, 524 

 Bunter formation, 688 



Burlington limestone, 597 

 Burton, A. E., 393 

 Bysmaliths, 15, 367 

 Byssonychia radiata, 527 



Calamites, 594, 644, 646, 670 

 Calamites cistii, 647 

 Calc-sinter, 82 

 Calcareous tufa, 82 

 Calcite, 76 



Calhoun, F. H. H., 875 

 California earthquake, 350 

 Calliostoma philanthropes, 826 

 Callipteridium mansfieldi, 655 



membranaceum, 655 

 Callopora pulchella, 529 

 Calaveras formation, 629 

 Calvin, S., 517, 876, 890, 917 

 Calymene callicephala, 524 



niagarensis, 553 

 Camarotsechia barrandei, 578 

 Cambrian beds, position of, 490 



close of, 490, 491 



fauna, 482, 494 



abrupt appearance of, 505 



glacial formations, 492 



life, advancment of, 501 



of Europe, 491 



outcrops, 486 



period, 476-506 

 duration of, 493 



plants, 495 



sedimentation, 484 



subdivisions of, 476 



submergence during, 478 



trilobites, 482, 495 

 Camels, 791, 820 

 Campbell, M. R., 163, 624 

 Campeloma harlowtonensis, 739 

 Camptonectes bellistriatus, 715 

 Camptosaurus, 722 

 Canadian epoch, 509 

 Cancellaria alternata, 826 

 Canis, 823 

 Cannel coal, 82 

 Canoe-shaped valley, 169 

 Canyons, 136 

 Cape May formation, '.ML* 

 Carabocrinus vancortlandti, f>.'{() 

 Carbon dioxide, a factor in 



898 



Carbon in igneous rocks, 23 

 Carbonaceous slate in Proterozoi 



459 

 Carbonation, 33, 102 



