60i 



BULLETIX OF THE GEOLOGICAL SOCIETY OF AMERICA 



Page 

 Piedmont area of northern Maryland, Struc- 

 tural relations in 554-555 



Pilot knob, Leucite hills, Locaiion and to- 

 pograph}' of 330 



, Rocks of 33U-3al 



PiRSSox, L. v., cited on classes of pheno- 



crjsts 389 



texture of igneous rocks 386 



— , and others. Title of paper b)' 533 



Pittsburg, Pennsylvania, Pocono formation 



at 26 



, Section at 53 



— meeting, local committee of, Vote of 



thanks to 13 



, Proceedings of. 1-14 



, Register of 14 



— region, Economic and stratigraphic 

 geology of 3-4 



, Geological excursion in, Report on... 3-5 



, Glacial and phj'siographic geologv 



of .". 4 



PiTTSTox, Pennsj'lvania, Harrisburg pene- 

 plain remnants near 290 



—, Pocono formation near 18 



Placentia bay, ^'ewfoundland. Submerged 



channel extending from 211, 212 



Plaxetesimal hypothesis, origin of ocean 



ba.-:iins under 548 



, Outline of 548 



Platt, Fraxklix, cited on thickness of the 



Mauch Chunk series 48 



the Mississippian in Pennsyl- 

 vania "... 20 



Platt, W. G., cited on thickness of the 



Mauch Chunk series 49 



Plkistocexe time, Inauguration of 139 



— , See also Glacial period. 



Pocono formation, Age and equivalents of, 29, 39 



40, 42, 44 



.Character of 17,38-39 



, Coal in 18, 19, 27, 28, 29 



.Correlation of. . 25, 29 



, Distribution and characteristics of 



rocks of. 17-38 



— — , Fossils of 19, 25 



, Geological relations of 38-45 



in Alabama 36 



Kentucky, Features of 29 



Pennsvlvania, Anthracite strip of... 18 



, Sections of 18, 19, 23, 30, 31, 36, 37 



, Thickness of. 18, 19, 20 



Tennessee 35-36 



Virginia. Character and thickness 



of 27 



AVest Virginia, Features of 27-35 



, Nomenclature of 17 



. Sections of. 18, 19, 23, 30, 31, 36, 37 



, Striitigvaphic equivalents of, 37 



, Thickness of 18-44 



^ stage (earlier), Area of sedimentation 



during 87-88 



, Material deposited during, Character 



of 88 



Popf.AR mountain, Kentucky, Section at.. 80-81 

 PoRPHYRiTic appearance of rocUs; A. C. 



Lane 385-406 



Portage faunas, Investigation of, by New 



York paleontologists « 536 



-, Migration of 536 



PoTOM.*c valley, Somerville Peneplain rem- 

 nants in...'. 288-290 



PoTTSviLLE, Pennsvlvania, Pocono formation 



at, Section and thickness of IS, 19 



PouGHQUAG quartzite, Character and thick- 

 ness of. 423 



Powell, J. W,, cited on definition of Pacific 



mountains 117 



— , Death of, reported by Secretary 497 



Presidext, Annual address of. 133-152 



— , election of Samuel F. Emmons as 503 



Page 

 Prestwich, Joseph, quoted on sand-pipes in 



the Tertiary of the London district..2o6-257 

 Price mountain, Mauch Chunk formation at 28 



, Coal beds at 28 



Primitive characters of the Triassic Ichthy- 

 osaurus [abstract] ; John C. Merriam .'.. 536 

 Proceedixgs of the Fifteenth Annual Meet- 

 ing, held at Washington, D. C, Decem- 

 ber 30 and 31, 1902, and January 1 and 2, 

 1903, including proceedings of the 

 Fourth Annual Meeting of the Cordil- 

 leran Section, held at San Francisco, 

 December 30 and 31, 1902; Herman Le 



Roy Fairchild, Secretary 495-588 



Fourteenth Summer Meeting, held 



at Pittsburg. Pennsvlvania, July 1, 1902; 



H. L. Fairchild, Secretary 1-14 



Proteax formation. Correlation of 83 



, in Tennessee, Character of. 37 



West Virginia, equivalent to Po- 

 cono 29 



— — , Stratigraphic place of 42 



Protoicarthia rossi sp. nov., Description of.... 42U 



— tenuissima sp. nov., Description of 420 



PsEx-Do-DioRiTE, Aualysis of 447 



PrBLicATiox Committee authorized to hold 



belated papers for succeeding volume... 535 

 PuMPELLT, Raphael, cited on pre-Glacial 



surface conditions in North America.... 135 



Purdue, A. H., Record ot remarks by 521 



Ptrite, Chemistry of oxidation oi...'. 275 



— faunas, Depauperation in, Causes of. 537 



— , from Butte, Montana, Chemical compo- 

 sition and analysis of. 274 



Pyroxexic rocks, 3Ianhattan island, Ex- 

 posures of 428 



. Features of 428 



Quaxtitative distribntion of rock magmas 



[abstract]; H. S. Washington 533 



Quartz-diorite schist, Manhattan i.'*land, 

 N. Y., Fault breccia in quartz vein in... 431 



-. Microscopic description of 435 



, New Rochelle, New York, Microscopic 



features of 483 



QuEXEAU, A. L., cited on the Palisade trap.. 371 

 theory ot cooling of igneous rocks.. 393 



Rammelsberg, C. F., cited on chalcocite 271 



Raxd, T. D., cited on hornblende schists in 



Pennsylvania 485 



Raxdall, F. a., cited on conglomerates in 



the Olean-Salamanca region 526 



correlation of Devono-Carboniferous 



formations 530 



Raxsome, F. L., cited on clastic dikes in 



Colorado 266 



— , quoted on clastic dike near Oura\', Colo- 

 rado 266 



Ravexswood, West Virginia, Section at 65 



Rayleigh, Lord, cited on stream lines about 

 a discoid meteorite projected into the 



aeiosphere 112, 113 



Read. M. C, cited on the Pottsville con- 

 glomerate in Ohio 56 



Reading, Pennsylvania. Remnants of Somer- 

 ville and Harrisburg peneplains near... 286 

 Recext volcanic craters in Idaho and Ore- 

 gon [abstract] ; I. C. Russell 549 



Red beds, Age of, in northern Texas 196 



. Relationships of, in Texas, Oklahoma, 



Indian Territory, and Kansas 198 



Red Bluff, California. Clastic dikes near 262 



Reefs, Bryozoan. See Bryozoa reefs. 

 — , Coral. See Coral reefs. 



Register of the Cordilleran Section 566 



Pittsburg meeting 14 



Washington meeting 561-562 



Reid, H. F,, Record of reriiarks by 548 



