972 



INDEX 



Rensselseria aequiradiata, 576 



ovoides, 578 

 Replacements, 44 

 Repressive evolution, Silurian, 546 

 Reptiles, ancestors of mammals, 

 672 



Cretaceous, 762, 765 



Eocene, 794 



mammalian branch of, 672 



Permian, 672 



Triassic, 692, 701 

 Reservoirs of ground-water, 200, 



220 



Reteograptus eucharis, 531 

 Reticularia pseudolineata, 610 

 Retusa canulus, 826 

 Reusch, H., 475, 492 

 Rhaetic formation, 688 

 Rhamphorynchus phyllurus, 723 

 Rhinidictya mutabilis, 529 

 Rhinoceros, 790, 802 

 Rhinoceroses, Miocene, 823 

 Rhipidomella burlingtonensis, 610 



oblata, 576 



vanuxemi, 585 

 Rhizopods, Cretaceous, 768 

 Rhone River, 250 

 Rhynchonella, 700 



sequiplicata, 700 



gnathophora, 715 



whitneyi, 741 

 Rhynchotrema capax, 528 

 Rhyolite, 86 

 Rhytimya radiata, 527 

 Rice, W. N., 683 

 Richmond beds, 509, 537 

 Richmond coal-beds, flora of, 691 

 Richthofen, Baron von, 90, 887 

 Ries, H., 884 

 Rifts, 840 

 Riggs, E. S., 721 

 Rill-marks, 320, 397 

 Rings in wood, earliest, 619 

 Ripley formation, 745, 749 

 Ripple-marks, 319, 396 

 Rivers, amount of water in, 110 

 Roches moutonne'es, 268, 857 

 Rochester shale, 537 

 Rock breaking, effected by temper- 

 ature, 103 

 "Rock flour," 859 

 Rock-salt, 38 

 Rock terraces, 157 

 Rock-waste, 34, 42 

 Rocks, classification of, 58 



Rocky Mountains, Proterozoic rocks 



in, 472 

 Rodents, Eocene, 787, 792 



Miocene, 823 



Pliocene, 843 

 Rogers, A. W., 737 

 Rondout wfiteriime, 5:; 7 

 Rose-quartz, 80 

 Roslyn formation, 778 

 Rotation and deformation, 365 

 Rothliegende, 663 

 Ruminants, Miocene, 820 

 Russia, coal of, 642 



Devonian in, 574 



Permian of, 663, 665 

 Russell, I. C., 177, 209, 236, 33 1. 335, 

 393, 680, 866, 908, 911 



Safford, J. M., 745, 829 

 St. Anthony Falls, 155 



age of, 892 



St. Gene vie ve limestone, 59X 

 St. Louis fauna, 613 



limestone, 598 

 St. Peters sandstone, 510 

 Salmanders, Cretaceous, 764 

 Salem formation, 598 

 Salenia tumidula, 768 

 Salina beds, 537, 542 



fauna, 556 

 Salt, 542 ^ 



in Michigan, 598 

 New York, 542 

 Ohio, 542 

 Salina series, 542 

 Salt lakes, 335 



Salt of Mississippian system, 606 

 Permian system, 661, 665 

 Triassic system, 684 

 Sand, eolian, 92 

 Sandstone, 36, 86 



bedding of, 395 



dikes, 409 



Sangamon interglacial interval, NI I 

 Sankpty Head, 845 

 Sapping, 154 

 Sarle, C. J., 538 

 Sassafras subintegrifolium, 760 

 Sauropoda, 720 

 Saussure, B. de, 287 

 Savage, T. E., 509 

 Savoy schist, 627 

 Sawatch quartzite, (>_". 

 Scala potomacensis, 796 



sayana, XJi; 



