400 



INDEX. 



O. I'age. 



Obolella atlantica, occurrence of 390 



Oboiella crassa, occurrence of 390, 392 



Obolus, occurrence of . . . 109, 110, 111, 112, U6, 314, 366, 382, 384 



Obolus { Lingulella) rogersi, occurrence of 113 



Obolus (Lingulobulus) affinis, occurrence of 113, 382 



Obolus (Lingulobolus) rogersi, occurrence of 382 



Obolus (Lingulobulus) spissus, occurrence of 113, 382 



Ocbro Point, conglomerate of. 311-312 



Odontopteris, occurrence of 170, 203-204 



Odontopteris bairdii, occurrence of 204 



Odontopteris cornuta, occurrence of... , 204 



Odontopteris neuropteroides, occurrence of 204 



Odontopteris obtusiloba, occurrence of 204 



Odontopteris reicbiana, occurrence of ? 204 



Odontopteris reicMana var. latifolia, occurrence of . . 204 



Odontopteris stiebleriana, occurrence of 204 



Olenellus waleotti, occurrence of 390 



Olenellus isone, occurrence and character of rocks of. 8, 105, 



380-393 



Oligocarpia gutbieri, occurrence of . . * 204 



Organic geology, features of 202-210 



Orogenic action, features and results of 20-25, 32-36 



Orogenio Mstory, features of 7,8,9-10 



Ortbop teroidea, occurrence of 202-203 



Overtbmst pbenomena, character of — , , 25-27 



OP. 



Fadiet Brook, granite near ..- 275 



slates aaid shales near - 281 



Packard, A. S., acknowledgments to 211 



cited on fossils of Pa wtacket shales . « 202 



PalaoblattarisB, oocurreno© of 202 



Paradise Kooks, conglomerates of 295-298 



Paralogus seschnoides, occurrence of 203 



Parsons^ W. E., acknowledgments to 211 



Passamaquoddy Basin, geologic history of 13-15 



Pattaq^uamscott Mrer, Carboniferous rocks near 246-247 



Pawtuxsketj Bm 1., coal beds at 79 



oonglom«nkte in, — - 141 



Cranston, beds at and near 159-162 



expcwaiire of red rocks of "Wamsutta group at. . - . 148 



fossil insects from 202,203,204 



Pawtuckefc shales, exposures of. , 162 



fossils of ..-.,,..,. 202 



table showing geologic place and equivalents of. 134 



Pawtuxet Eiver, Carboniferous beds near 259 



Pebbles, condiiaons of making of 56-58 



compressive distortion of.- - 18 



Pecopteris,oocurrenoeof.»--*. 168,170,191 



Pecopteris abbreviata, occurrence of 204 



Peoopteris arborescens, occurrence of 204 



Pecopteris borealis, occurrence of 191 



Pecopteris dentata, occurrence of 204 



Peoopteris gigantea, occurrence of 191 



PewptiKris bemiteloides, occurrence of 204 



Peoopteris lepidowtoMs, occurrence of 204 



Pecopt«ris loschli, occurrence 5>f 191 



Peoopteris miXtoni, occurrence of. , 204 



Pecopteris unita, occurrence of 170 



Pegmatite dikes, view of 376 



P^matit««,TiewaoJr 244 



Pembroke, Ka»s.. Carboniferous and other rocks n ear 194 



Perrins, anticlinal exposure of low beds at. , . 169-170 



Perry, J. Hn cited 126 



Page. 

 Pierces Pasture, near Pondville Station, Mass., sec- 

 tion at 135-136 



Plainville, Mass., section in 183 



view of Carboniferous sandstones at 186 



Plainville Valley, Wrentham, Mass., view of 180 



Plants, fossil, occurrence of — 170, 



181, 204, 260, 261, 268, 275, 276, 285, 289, 293, 



314, 320, 321, 326, 347, 363, 372, 374, 378, 387 



Plastic movement of rock, regional distribution of . . 18-19 



Platyceras primsevum, occurrence of 390 



Pleurotomaria (Baphistoma) attleboroensis, occur- 

 rence of 389 



Ply tnpton felsites, occurrence and character of 116 



Pondville, Mass., section in 135-136 



Pondville group, features of beds of 135-141 



table showing geologic place and equivalents of. 134 



Pontiac, Carboniferous rocks near 256 



Popasquash Keck, Carboniferous sandstone on 261 



Portsmouth, E. I., analyses of coal from 83 



Carboniferous rooks near 288-289 



conglomerate in 373 



coal beds at 81,321 



record of boring in 321-325 



value of coal from 83-85 



Portsmouth coal mine, operations at 206-207 



Portsmouth Grove Station, rocks near 328-329 



Poto womut Eiver, Carboniferous rocks near 251-252 



Potsdam sandstone, pebbles and fossils of 109-113 



Pre-Cambrian rooks, occurrence, character, and re- 

 lations of - 104-109 



Pre-Carboniferous rocks, fossils of 381, 382, 383, 384 



occurrence and character of. 104-113, 381-385 



Prices I^eok, rooks near 316 



Protophasmida, occurrence of ,.. 203 



Providence, E. I., coal bed at - 206 



Cranston beds at and near 159-164 



hypothetical geologic section through 160 



record of wellsunkat 161 



view of glaciated Carboniferous ridge at 162 



view of pre-Carboniferous rocka near 126 



Providence Eiver, Carboniferous beds near 259-260 



synclinal fold in Kingstown series near 345 



Prudence Island, B. I., rocks and geologic features 



of 237-241,342-343,345,350-351 



Prudence Island, Kingstown series on 342-343 



views on 350,352,362 



Pseudopecopteris dimorpha, occurrence of 204 



Pseudopecopteris irregularis, occurrence of 191 



Ptychoparia attleboroensis, occurrence of 390 



Purgatory chasm, typical conglomerate at 365-366 



Purgatory conglomerate, occurrence and character of 364-374 



table showing geologic place and equivalents of. 134 



Putnam, B. T., analyses by 83 



Q. 



Quaker HiU, A.quidneck shales near 356 



Quartz, occurrenceof 155 



Quartzites, occurrence of- , 382, 383-384 



Quartz-porphyries, occurrence of . , - 153, 155 



Baindrop imprints, view of 178 



Bainfall and arkose, relations of 55-57 



Baynham, coal bed in 205 



