INDEX. 



611 



Permian, South Africa, ii, 635 



South America, ii, 638 



system west of the Mississippi, 

 ii, 620 



Texas, ii, 623 



thickness of, ii, 625 

 Permiric rocks, i, 458 

 Permirlic rocks, i, 458 

 Permitic rocks, i, 457 

 Pernopecten cooperensis, ii. 520 

 Perolic rocks, i, 457 

 Perpolic rocks, i, 456 

 Perpotassic rocks, i, 458 

 Perpyric rocks, i, 457 

 Perquaric rocks, i, 456 

 Perrey, A., cited, i, 537 

 Perrine, C. D., cited, i, 538 

 Perry, J. H., cited, ii, 54Q 

 Persalane, i, 455. 459 

 Persalic rocks, i, 454 

 Persodic rocks, i, 458 

 Pertilic rocks, i, 457 

 Petalocrinus, ii, 411 



mirabilis, ii, 403 

 Petrifaction, i, 223 

 " Petrified turtles," i, 496 

 Petroleum, i, 465 



Miocene, iii, 279 



Tertiary, iii, 280 

 Petrology, i, 1, 393-485 

 Petrosilex, i, 472 

 Pfaff, F., cited, i, 537 

 Phacoides, iii, 295 



(pseudomiltha) foremani, iii, 

 292 

 Phacops logani, ii, 455 



rana, ii, 471 

 Phalen, W. C, cited, ii, 28 

 Phanerites, i, 451 

 Phanero-crystalline rocks, i, 412 

 Phenacodus, iii, 230 



primaevus, iii, 230 

 Phenocrysts, i, 412 

 Philippines, Miocene of, iii, 281 



Pliocene of, iii, 320 

 Phillips, J., cited, ii, 410 

 Phillipsia, ii, 618 



major, ii, 616 

 Philosophic geology, i, 1 

 Phinney, A. J., cited, ii, 336 

 Phlaocyon, iii, 253 

 Phlegethontia, ii, 608 

 Phobos, ii, 10 



revolution of, ii, 63 

 Pholidogaster, ii, 538 

 Pholodomya, iii, 91 

 Phonolite, i, 472 

 Phosphates, Devonian, ii, 440 



Florida, iii, 261 



Ordovician, of Tennessee, ii, 

 337 

 Photobathic fauna, i, 670 



life, ii, 292 



zone, i, 670 

 Phragmoceras nestor, ii, 403 

 Phyllite, i, 472 



Phyllocarids, Devonian, ii, 490 

 Phylloceras, iii, 134 



knoxvillensis, iii, 136 

 Phyllograptus, ii, 364 



Phyllograptus cambrensis, ii. 287 



ilicifolius, ii, 362 



typus, ii, 362 

 Phyllopods, Devonian, ii, 490 

 Phylloporina granistriata, ii, 358 

 Phyllotheca, ii, 646 



indica, ii, 645 

 Physa prisca, ii, 528 

 Physiographic geology, i, 1 

 Physiography, Newark Series, 



iii, 19 

 Phytosauria, iii, 42 

 Picayune andesite, iii, 572 

 Pickens sandstone, iii, 548 

 Picrolite, i, 465 

 Pictotite, i, 465 

 Piedmont glacier, i, 254 

 Piedmont plain, alluvial, i, 183 

 Piedmontite, i, 465 

 Pierre shale, iii, 151, 153, 154, 



155, 206, 564, 566, 570 

 Pilot Rock, iii, 340 

 Pinal schist, iii, 575 

 Pinna, iii, 91 



Pinyon conglomerate, iii, 210 

 Piracy, i, 160 



domestic, i, 104 



extent of, in Appalachians, i, 

 170 



foreign, i, 104 



of Kaaterskill Creek, i, 105 



of Plaaterskill Creek, i, 105 

 Pirsson, L. V., cited, i, 412, 451, 



573; (and Weed), iii, 120 

 Pismo formation, iii, 264, 310, 



577 

 Pisolite, i, 465, 496 

 Pitchstones, i, 408, 453, 472 

 Pithecanthropus erectus, iii, 325, 



326 

 Pitted plains, iii, 373 

 Pittsford shale, ii, 390 

 Plaatekill Creek, piracy of, i, 



105 

 Placentals, Eocene, iii, 228 



Pliocene, iii, 322 



possible origin in Africa, iii, 

 224 

 Placodontia, ii, 339 

 Plagioclase, i, 465 

 Plain, alluvial, i, 181, 184 



graded, i, 169 



outwash, i, 306 

 Plainfield, N. J., terminal mo- 

 raine near, iii, 364 

 Planation, i, 82 



glacial, iii, 346 

 Planetary nuclei, ii, 61 



growth of, ii, 64, 67, 78 

 Planetary orbits, shifting of, ii , 78 



rings and rotation, ii, 70 



rings, formation of, ii, 4 



rotation, ii, 70-75 



rotation, on accretion hypoth- 

 esis, ii, 70 



rotation, on Laplacian hypoth- 

 esis, ii, 70 

 Planetesimal collisions, ii, 66, 72 



condition, from gaseous spher- 

 oid, ii, 39 



Planetesimal condition, from 

 meteorites, ii, 40 



from original nebular disper- 

 sion, ii, 40 

 Planetesimal hypothesis, def- 

 ormations under, ii, 122 



early stages of earth under, 

 ii, 91 



sub-varieties of, ii, 38 

 Planetesimal infall, effect on 

 temperature, ii, 68 



motions, ii, 64 



nebulae, ii, 48 



orbits elliptical, ii, 72 

 Planets, eccentricities of, ii, 

 79 



origin of, ii, 60 



spacing out of, ii, 78 

 Planorbulina, iii, 294 

 Plant-growth, influence of car- 

 bon dioxide on, ii, 605 

 Plant kingdom, geologic con- 

 tributions of, i, 652-638 

 Plant life and carbon dioxide, i, 



665 

 Plant life, Cambrian, ii, 278 



Carboniferous, ii, 591 



Cretaceous, iii, 173 



Devonian, ii, 491 



Jurassic, iii, 94 



Mississippian, ii, 537 



Ordovician, ii, 346 



Pennsylvanian, ii, 591 



Permian, ii, 642 



Silurian, ii, 409 



Triassic, iii, 38 

 Plant societies, i, 667 

 Plants, contribution to deposits, 

 i, 652-658 



effect on erosion, i, 131, 644 



migration, in glaciated areas, 

 iii. 533 



reference table of, i, 653 



weathering influenced by, i, 

 112 

 Platanus, iii, 173 

 Plateaus, origin of, ii, 124 

 Platecarpus coryphaeus, iii, 180 

 Platephemera antiqua, ii, 494 

 Platte river, i, 187 

 Platyceras dumosum, ii, 462 



gibbosum, ii, 455 



nodosus, ii, 459 



primaevum, ii, 297 



sp'rale, ii, 455 

 Platycrinus, ii, 522 



gorbyi, ii, 525 



verrucosus, ii, 525 

 Platygonus compressus, iii, 230 

 Platyostoma broadheadi, ii, 524 

 Platysomus, ii, 652 



gibbosus, ii, 653 

 Platystrophia biforata, ii, 367 



lynx, ii, 356 

 Playas, iii, 458 

 Pleasonton shales, ii, 561 

 Plectambonites sericeus, ii, 356, 



367 

 Plectorthis newtonensis, ii, 299 

 Pleistocene armadillo, iii, 498 



