INDEX TO VOLUME 17 



775 



Page 

 Ouray quadrangle, Evidence of glacia- 



tion in 252 



Ovando quadrangle, Montana, Reference 



to 3 



Overlap,, Application of principal of 



transgressive 571-503 



— , Classification of types of 501) 



— , Character of irregular 569 



— , Description of formation of trans- 

 gressive 570-571 



— , Diagrams showing compound GIG 



— , Examples of compound regressive 



and transgressive 615-G27 



non-marine progressive... 629-636 



progressive 593-G15 



— , Basal Paleozoic series, Character 



and examples of transgressive. 571-580 

 Mesozoic series. Character and ex- 

 amples of transgressive 589-593 



— . Statement of principles of com- 

 pound regressive and transgress- 

 ive 615-61G 



— ■ regressive 613-615 



— , Types of progressive 560-570 



sedimentary 567-636 



Owen, D. D., Acknowledgments to.... 230 



— cited on origin of Saint Peter sand- 



stone 237 



trilohite beds of the upper 



[Mississippi area 581 



Owl Creek canyon. Wyoming, View 

 showing Bighorn limestone in, 

 plate 76 552 



— ■ — mountains, Wyoming, Ordovician 



in 552-553 



Owls head, Quebec, Character and 



composition of 511 



Ozette lake, Ovlmpic peninsula, Loca- 

 tion of 457 



Packard, , Name "lunoid furrow" 



used by 314 



Paleogeography of Saint Peter time, 



by C. P. Berkey ' 220-250 



Paleozoic basal beds of Rocky Moun- 

 tain region. Age of 586-587 



— ■ — rocks of the Ozark region .... 579-580 



— formations, Discussion of compara- 



tive thickness of 235-236 



— — . Table showing thickness of 233 



Paris basin, Character of Tertiary de- 

 posits in 204 



Park granite stock. Correlation of 356 



, Occurrence, extent, and char- 

 acter of 356 



.Specific gravity of 356 



Pasaytex Cretaceous beds 350 



— formation. Plan showing relations of 



Castle Peak granodiorite to 364 



Passarge, S., cited on arid erosion. . . . 440 



Mesozoic graben 380 



origin of peneplains 435-436 



peneplains of South Africa. . . . 430 



uplifts in pre-Dwyka time.... 475 



— ■, Title of paper by 294 



Peach Orchard coal bed. Occurrence, 



character, and thickness of 220 



Peale. A. C, cited on occurrence of 



Pseiiflomotis pealel 591 



— section on Camp creek. Glen 



Eyrie 565 



— , Title of paper by 565 



Pearl River series, Age, character, and 



thickness of 479 



Pegmatite. Blue granite intersected by 



faulted 538 



— ■ dikes and veins, View showing, 



plate 71 . 538 

 Pegmatites of Richmond-Fredericks- 

 burg areas, Virginia, Intrusion 

 and character of 536-539 



Page 



Pegmatites of Richmond-Fredericks- 

 burg areas, Virginia, Occurrence 

 and composition of 536 



— , Relative periods of 



formation of 538-539 



Penck, , Excursions in South 



Africa planned by 409, 411 



— , Member of geological excursions in 



South Africa 406-407, 421 



— , Term "til lite'' used and introduced 



by 401, 410 



Pexeplaixs, Occurrence in South 



Africa of 420-430 



— , Undissected character of South 



African 431 



Pennsylvania Allegheny formation.. 94-109 



— basin, Allegheny formation of first. 80-88 

 — , Conemaugh formation of first bi- 

 tuminous coal basin of 165-168 



second bituminous coal 



basin of 168-172 



— ■ — • - — ■ — ■ western bituminous basins 



172-182 



— , Dike of mica-peridotite from Fay- 

 ette county, southwestern, by J. F. 

 Kemp 691 



— , First bituminous coal basin of . . . 80-88 



— , Second bituminous coal basin of. . 88-94 



— , Summary of conditions in coal beds of 86 



intervals between Upper Free- 

 port and Lower Kittanning in ... . 93 



— , Table showing intervals between 

 Upper Freeport and Lower Kittan- 

 ning in 86 



Percival, J. G., Reference to geological 



map of Connecticut by 727 



Perkins,, G. H., cited on crustacean 



remains in Diamond head, Oahu. . 482 



Permanent Publication Fund 675 



Permian glaciation, Peculiarity of 



South African 408 



Perry county, Ohio, Section in 121 



— park, Colorado, Occurrence of lime- 



stone in 5G5 



Petersburg granite. See Richmond- 

 Petersburg. 

 Fetroleum in southern Alberta, Dis- 

 covery of 295 



— , Occurrence of 459, 460 



'Phalbx, W. C, Unakite granite ana- 

 lyzed by 530-531 



— •, Reference to work in Elliott county, 



Kentucky, by 694 



Phillippi, West Virginia, Section near. 133 

 Phlox mountain, Occurrence of Big- 

 horn limestone in 552 



Photographs., Report of Committee on. 



700-701 

 Pictured rocks, Colorado. Reference to. 269 

 Piedmont region of Virginia, Distribu- 

 tion and character of rocks in. 524-525 



— , Extent of 524 



. Geology of 524 



Pierre formation, Character and thick- 

 ness of 301-302 



— shales. Thickness of 626 



Pillar point, Olympic peninsula, View 



showing wave-cut niche on, plate 



56 456 



Pillsbry, , cited on origin of the 



Achatinella 483 



Pirsson, L. V., cited on progression of 



rock types 521 



Pittsburg limestone, Occurrence of. 154-155 



— reds, Occurrence and character... 



of 161-162 



, Term used by Doctor White 161 



Plaxation surfaces, Effect of climate 



on 397-398 



in the Karroo, Character and ex- 

 planation of 397-399 



