INDEX TO VOLUME 34 



755 



Page 



Oligocexe of west coast, New genus of 



Pelecvpoda from 118 



Ontario, Ellsworthite from Hybla. . . . 150 



— , Rock alteration at Sudbury 14G 



Ordovician formations in Kentucky 



and Tennessee 131 



— overlap in the Piedmont Province of 



Pennsylvania and Maryland ; G. W. 



Stose and Anna I. Jonas 67, 507 



Ore deposits, Effect of climatic change 



on 146 



in Australia 144 



— formation. Source of pressure of... 146 



Oregon, Stratigraphy of central 129 



Origin and formation of certain Appa- 

 lachian bauxite deposits ; W. A. 

 Nelson 97 



— • — history of extinct Lake Calvin, 



Iowa ; W. H. Schoewe 93 



Orogenic exigencies of a rotary earth ; 



Charles Keyes 62 



Orogeny, Kober's theory of 231 



OsTRACODERMS from Ohio, New 133 



Outlines of Appalachian structure ; 



Arthur Keith 309 



OzARKiAN and Canadian systems 134 



Paige, Sidney ; The Homestake orebody 144 



Palache, C. ; Diamond mines of South 



Africa 150 



— ; Geological map of the Bushveld 



complex. Transvaal, South Africa. 95 



— ; Vanadium deposits of the south- 

 west African protectorate 150 



Paleobotanical contributions to the 

 stratigraphv of central Oregon ; 

 E. W. Chaney 129 



Paleogeography, Quantitative criteria 



in 85 



Paleozoic reptiles 403 



— rocks found in deep w^ells in Wiscon- 



sin and northern Illinois ; F. T. 



Thwaite 73 



Parallel folds and boudinage ; T. T. 



Quirke 59 



Par I A River Valley, Physiography of . . 94 

 Parks. W. A. ; New species of crested 



trachodont dinosaur 130 



Parsons. A. L. ; Formation of kaolin at 



moderate depths 149 



— - and T. L. Walker ; Ellsworthite, 

 New hvdrous uranium columbate 

 from Hybla, Hastings County, On- 

 tario 150 



Patton. H. B. : Merging of the Carlile 

 shale and Timpas limestone forma- 

 tions in southeastern Colorado. 74,495 

 Pegmatites in northern Minnesota.... 146 



Pelecypoda, a new genus of 118 



Pennsylvania, Ordovician overlap in 



Piedmont of southern 67, 507 



Permian conditions in West Virginia. . 72 

 — • faunas of Texas and South Africa . . 403 



Petroleum. Mother plants of 145 



Philippine Islands, Tertiary and Qua- 

 ternary diastrophism in 59 



Phillips, A. H. : Possible source of 



metallic sulphides in limestone. . . . 149 

 Phylogeny of the genus Agasoma ; 



H. V. Howe 118 



Physical historv of the Colorado Front 

 Range : F. M. Van Tuyl and G. W. 



Machamer 87 



Physiography of the Paria River Val- 

 ley, southern Utah ; R. C. Moore. . 94 



Plains, Crystalline rocks of the 541 



Pleistocene concretions, Canadian 64, 609 



— • glaciation in Alberta 419 



■ — — . Certain effects of 82 



— of northwestern Illinois : A graphic 



presentation of some of the c^^ief 

 lines of evidence ; M. M. Leighton . 90 



Page 

 Pleistocene terrace plains of the mid- 

 dle Atlantic Coastal Plains , 91 



— vertebrates from an asphalt deposit 



near McKittrick, California ; J. C. 

 Merriam and C. Stock 119 



Pliocene mammals of southern China : 



W. D. Matthew and W. Granger.. 128 



Possible continental links ; Bailey 



Willis 120 



— • source of metallic sulphides in lime- 

 stone ; A. H. Phillips 149 



Post-glacial banded clay near Ncav 



York City 92 



Pottsville formation in western Penn- 

 sylvania 68 



PiED.MONT Province of Pennsylvania 

 and Maryland, Ordovician overlap 

 in the 507 



Precambrian folding in North Amer- 

 ica ; W. J. Miller 66, 679 



Precipitants and solvents in Michigan 



copper lodes 100 



Prediction of earthquakes ; A. C. Law- 

 son 119 



Preliminary report concerning some 

 new ostracoderms from Ohio ; J. E. 

 Carman 1.3.3 



Present status of the geodetic work in 

 the United States and the value to 

 geology : William BoAvie 74 



— ■ — • — — ■ Ozarkian nad Canadian sys- 

 tems : E. O. Ulrich 134 



Presidential address by W. Lindgren. 

 of the Society of Economic Geol- 

 ogists 144 



— ■ — • — ■ W. D. Matthew : Recent prog- 

 ress and trends in vertebrate pale- 

 ontology 130, 401 



— — — -Charles Schucbert : Sites and 



nature of the North American geo- 

 syncline 151 



T. L. Walker, of the Mineral- 



ogical Society 149 



Primary chalcocite. Bristol copper 



mine, Connecticut: A. M. Bateman 146 



P'u.\fATFS and man 410 



PRO.JECTTON apparatus in teaching min- 

 eralogy. Use of 150 



Proceedings of the Thirty-fifth Annual 

 Meeting of the Geological Society 

 of America, held at Ann Arbor. 

 Michigan. Thursdav-Saturdav, De- 

 cember 28-30. 1922 ; Charles P. 

 Berkey. Secretary 2 



— • — ■ — -Twenty-first Annual Meeting 

 of the Cordilleran Section of the 

 Geological Society of America, held 

 at Stanford T^niversitv. California. 

 Aoril 29, 1922 : A. F. Rogers. Sec- 

 retarn 117 



^ Third Annual Meeting of the 



Mineralogical Society of America, 

 held at Ann Arbor, Michigan. De- 

 cember 29, 1922 : F. R. Van Horn, 

 Ste'^rrtarp pro tempore 147 



■ — -Fourteenth Annual Meeting of 



the Paleoutological Society, held 

 at Ann Arbor. Michiaan. Decem- 

 ber 28, 1922 ; R. S. Bassler, Secre- 

 tory 121 



^ Second Annual INIeeting of the 



Society of Economic Geologists, 

 held at Ann Arbor. Michisran. De- 

 cember 28-30, 1922 ; Svdnev IT. 

 Ball. Serretary 143 



Progress of mineralogical methods : 

 Presidential address by T, L. Wal- 

 ker 149 



Problem of mild geological climates ; 



Ellsworth Huntington 81 



Pyorrhoea in the Cohoes mastodon ; 



J. M. Clarke 127 



