INDEX 



971 



Proterzoic continued 



era, 435, 448-475 



fossils in Montana, 474 



Lake Superior, 456, 467 



life of ,473 



metamorphism of, 469 



outcr.ops, 456 



outside America, 473 



relations to Archean, 456 



rocks, 453 



rocks, thickness of, 460 



rocks in the west, 472 



sedimentation, 450 



sediments, sources of, 458 



systems, unconformities between, 



457 



Protocardia levis, 797 

 Protoceras, 803, 820 

 Protohippus, 821 

 Protowarthia cancellata, 526 

 Protozoans, Cambrian, 500 



Cretaceous, 768 



Eocene, 794 



Gene vie ve, 615 



Pennsylvanian, 657 

 Provincial features of Ordovician 



life, 522 

 Pseudomonotis curta, 715 



hawni, 675 

 Pseudomorphs, 44 

 Pteridophytes of Pennsylvanian, 



643 

 Pterinea demissa, 527 



emacerata, 551 



flabella, 585 



Pterodactyls, Cretaceous, 765 

 Pterodactylus spectabilis, 724 

 Pterogptus, 556 



anglicus, 556 

 Pteropod oozes, 329 

 Pteropods, Osage, 610 

 Pterosaurs, Cretaceous, 765 



Jurassic, 723 



Pterygometopus callicephalus, 524 

 Pterygotus, 592 

 Ptychoceras crassum, 770 

 Ptycoparia kingi, 496 

 Puddingstone, 83 

 Puerco beds, 777 

 Pugnax uta, 658 

 Pulaski formation, 779 

 "Pulpit-rocks," 306 

 Pumice, 20, 61, 86, 328, 379 

 Pumpelly, R., 890 

 Pupa vermilionensis, 655 



Purbeck beds, 710 

 Purington, C. W., 777, 778 

 Putnam, G. R., 481 

 Putorius, 823 

 Pyrite, 80 



Pyroclastic material, 370, 377 

 Pyroclastic rock, 15, 20, 86 

 Pyropsis bairdi, 768 

 Pyroxenes, 26, 80 

 Pyroxenite, 60, 86 



Quadrumana, Eocene, 787 

 Quartz, 21, 26, 80 



secondary enlargement of, 43 

 Quartz-andesite, 83 

 Quartzite, 43, 52, 86 

 Quartz-leucophyre, 61 

 Quartz-melaphyre, 61 

 Quartzophyres, 60 

 Quartz-porphyry, 60, 61 

 Quaternary period, 772, 846-943 

 Quercus suspecta, 760 



Radiolarian ooze, 38, 329 

 Rafinesquina alternata, 528 

 Rain, mechanical work of, 108 

 Raindrop impressions, 397 

 Ramsey, A. C., 663 

 Rancocas formation, 744 

 Ransome, F. L., 568, 735 

 Raphistomina lapicida, 526 

 Rapids, 153, 154 

 Ravine, 115 



Reade, T. M., 204, 315, 366 

 Reagan, A. B., 568 

 Recent period, 772 

 Receptaculites, 553 



occidentalis, 533 



oweni, 554 



Recessional moraine, 869 

 Reconstructed glacier, 236 

 Red Beds, 661, 684 

 Red clay, 329, 330 

 Red muds, 327 

 Red Sea, 840 

 Regolith, 86 

 Reid, H. F., 239 

 Reindeer, Pleistocene, 920 

 Reineckia brancoi, 712 

 Re jun venation of streams, 170 

 Relief of lithosphere, 358 

 Relief of ocean basins, 9 

 Renault, B., 594 

 Rendu, L. C., 287 



