776 



BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



Page 

 Planation terraces. See Planation 



surfaces. 

 Platt, F., cited on the Allegheny for- 

 mation in Pennsylvania . 83 



Johnstown sub-basin, 



Pennsylvania 84 



— ■ Somerset county, Pa. . 85 



— ■ — ■ Tioga county, Pa 89 



— ■ — ■ — ■ Clinton County coal areas 81 



— ■ Conemaugh formation at Ben- 

 nington, Pennsylvania 1G6 



correlation and character of 



Conemaugh formation in the Salis- 

 bury sub-basin, Pennsylvania.. 166-167 



Gallitzin coal bed 160 



his method of grouping Penn- 

 sylvania coal measures 67, 68 



Lower Freeport coal bed 82 



Kittanning coal bed 72 



Mahoning sandstone 81 



— occurrence of limestone near 



Houtzdale, Pennsylvania 83 



Snowshoe coal field 81 



Upper Kittanning coal bed.... 71 



Platt, W. G., cited on Allegheny for- 

 mation in Armstrong county, 



Pennsylvania 100 



- — ■ Indiana 98 



— Jefferson county, Pa . . 97 



— ■ Johnstown sub-basin, 



Pennsylvania 84 



■ near Clearfield county, 



Pennsylvania 91 



Castlemans River section 85 



— coal beds in Westmoreland 



county, Pennsylvania 105, 106 



of the Barclay area 80 



Conemaugh formation in Arm- 

 strong county, Pennsylvania. . 175-176 



Indiana county, Pa... 173 



— — ■ Jefferson county, Penn- 

 sylvania 172-173 



— near Salzburg, Pa 173 



— correlation and character of 



Conemaugh formation in the Salis- 

 bury sub-basin, Pennsylvania. . 166-167 



of Upper Mahoning 173 



. — Johnstown cement limestone . . 72 



thickness of the Conemaugh 



formation 173 



section in Indiana county, 



Pennsylvania 169-170 



Lycoming area 80-81 



— , Coal areas of Tioga county meas- 

 ured by 88, 89 



Pleasants county, West Virginia, Sec- 

 tion at 205 



Pleistocene deposits in Arkansas val- 

 ley, Colorado, Character and corre- 

 lation of 271 



, Occurrence, character, thickness, 



and origin of 466-467 



of gold in 467 



— time, Climatic changes in 398 



Pliocene area of Oahu, Hawaii, Loca- 

 tion and extent of 479 



— , Illustration showing unconformity 



between the Miocene and 466 



— , Quinaielt formation of 465-466 



— , Thickness of 466 



Pocono formation, Character of non- 

 marine progressive overlap in. . 629-632 



Origin and character of 634-636 



, Section of 630 



, Thickness of 630, 631 



Point Funston, Elevation at 57 



— Latouche, Changes of level near .... 

 , Destruction by earthquake wave 



near 



, Earthquake avalanches near 



Page 

 Point Funston, Uplifted shorelines at.. 57 

 Pomeroy, Ohio, Oil-well record at.. 197-198 

 Pontegrande, Calabria, Character and 



thickness of torrential deposits at. 291 



.Section of cross-bedding near... 291 



Porphyrite in eastern Quebec, Occur- 

 rence and character of 510 



Porphyritic granite, Location and 



composition of Virginia 531-532 



Potchefstroom system, Location and 



character of 410 



Potholes, Occurrence of ........ 318, 319 



— , Origin and character of 319 



Potomac basin. See Georges Creek 



56 



Faults near 51 



Potsdam formation in Wisconsin, 



Character of 243 



— — , Occurrence of 232 



, Canada, Occurrence, character, 



and correlation of 584-585 



Potter county, Pennsylvania, Coal 



measures in 94 



Potts ville coal beds, Designation of. .65-67 

 ■ — formation, Diagram showing rela- 

 tionship of members of 636 



, Non-marine progressive overlap 



in 634-636 



Powell mountain, West Virginia, Sec- 

 tion at 134 



Pre-Cambrian, Bad Rocks Canyon sec- 

 tion of 12-13 



— , Dearborn River section of 8-9 



— , Erosion of Algonkian 16 



— formations of Belton, Montana... 12-13 



eastern Quebec 498, 499 



— Belt mountains, Montana 2 



■ — , Lewis and Clark Pass section of . . . 9-10 



- — -, Mission Range section of 2-8 



— , Nyack Creek section of 13-14 



— sediments in eastern Quebec, Char- 



acter and structure of 505-509 



, Order of deposition of . . 509 



— , Swan Range section of 10-12 



— volcariics, Correlation of 505 



Precipitation, Influence on cultures 



of 655, 656, 658, 659 



Pre-Dwyka formation. See Dwyka 



(Pre-). 

 President, Annual address of the So- 

 ciety's '. 637-670 



— , Election of I. C. Russell as 680 



Preston county, West Virginia, Section 



at 93-94 



Pretoria series, near Vereeniging, 



Transvaal 411 



Prichard series, Age of 26 



, Correlation of 20 



— slate, Character and formation of. 14, 15 

 Prieska, Cape Colony, Occurrence of 



striated quartzites near 412 



Primrose coal bed, Occurrence and 



thickness of 219 



Proceedings of the Eighteenth Annual 

 Meeting, held at Ottawa, Canada, 

 December 27, 28, and 29, including 

 proceedings of the Seventh Annual 

 Meeting of the Cordilleran Section, 

 held at Berkeley, California, De- 

 cember 29 and 30, 1905 ; Herman 

 Le Roy Fairchild, Secretary.. 671-754 

 Productive (Upper and Lower) coal 



measures, Use of term 68 



Progressive overlap, Diagram showing 



marine 628 



non-marine 628 



. relations between marine 



and non-marine 629 



, Examples of 593-615 



non-marine 629-636 



.Explanation of term non-marine. 



627-629 



