INDEX TO VOLUME 32 



485 



Page 



Oregon, Physical and economic geogra- 

 phy of 146 



Oredonts, Lower Harrison 137 



Orientite from Cuba 165 



Origin and composition of certain oil 



shales ; R. Thlessen 72 



— • — distribution of the loess; G. F. 



Wright 48 



■ history of Lake Chelan ; J. J. Run- 

 ner 87 



— • of Adirondack magnetite deposits. 



W. J. Miller 63 



-South American faunas; Presiden- 

 tial address by F. B. Loomis. . 131, 187 



— — the colemanite deposits of Califor- 



nia ; N. F. Foshag 165 



Orogenic forces ; H. F. Reid 83 



— movements in Oklahoma 48 



Ortiioclase from Penticton, British 



Columbia 165 



OSBORN, H. F. ; Evolution, phylogeny, 

 and classification of the Mastodon- 



toidea 327 



— ; Evolution, phylogeny, and classifica- 

 tion of the Proboscidea 136 



Osceola, lovs'a. Proboscidean remains 



near 80 



Packard, E. L, ; An addition to the ma- 

 rine mammalian fauna of Newport, 

 Oregon 148 



— ; Trigoninte of the Pacific coast of 



North America 148 



— and R. N. Nelson ; Geologic occur- 



rence of the Hardgrave .Jurassic 

 fauna of Burns. Oregon 148 



Pacific coast of North America. Trigo- 



ninse of the 148 



— ■ regions, Crustal deformations in ... . 32 



Palachb, C. ; Holdenite and cahnite : 

 Two new minerals from Franklin 

 Furnace, New .Jersey 166 



Paleogeography and correlation of the 

 marine Tertiary deposits of the 

 west coast ; B. L. Clark 90 



Paleontological exhibits of the U. S. 



National Museum; R. S. Bassler. .. 126 



— Society, Proceedings of 119 



I-*alestine, Geology of 70, 146 



Parsons, A. L. ; Calcite from Shango- 



inah Island, Lake Superior 165 



— and E. Thomson; Mineralographic 



study of animikite and macfarlanite 

 from Silver Islet, Lake Superior. . . 165 



Pathology of Mesozoic animals 130 



reptiles 321 



Pebbles, Field study of shapes of 89 



— , Method of measuring and plotting 



shapes of 89 



Peccary from Rancho La Brea ; J. C. 



Merriam and C. Stock 149 



. Peneplainal affinities of high plateaux 



of Utah ; C. R. Keyes 56 



Pennsylvaniax glaciation in Arbuckle 



and Wichita Mountain regions .... 91 

 Penrose, R. A. F., Jr. ; Relation of eco- 

 nomic geology to the general prin- 

 ciples of geology 158 



Pentictox orthoclase 165 



Permian of Texas 134 



Petroleum. Important epochs in the 



history of 42, 171 



Petrographic unconformity, A signifi- 

 cant 58 



Petrography of the rocks of Kohala 



and Kea, Hawaii 58 



Sweet Grass Hills, Montana... 443 



Page 



Petrology : Igneous geology of south- 

 eastern Idaho 249-266 



— : Pre-Cambrian rocks of Manitoba 267-292 



— , True sphere of 72 



Phylogeny of the Mastodontoidea. . . . 327 

 Physical and economic geography of 



Oregon ; W. Du Pre Smith 146 



Physiographic diagram of the United 



States ; A. K. Lobeck 71 



Pleistocene Champlain Sea 132 



— • fauna of the Hudson Valley 132 



— formations of Sweet Grass' Hills. .. . 466 

 — - readvance of ice-sheets in British Co- 

 lumbia 51 



Point Pelee, Lake Erie, Shoreline mi- 

 gration at 57 



PoRPHYRiTic granitic gneisses, inter- 

 preted as lit-par-lit injections in 

 schists ; .J. F. Kemp 63 



Postglacial changes of level in New- 

 foundland and Labrador ; R. A. 

 Daly 53 



— faulting about Mount Toby, Massa- 



chusetts ; F. B. Loomis. . .' 75 



Post-Illinoisan drift in northern Illi- 

 nois west of the mapped Wisconsin 



moraine ; M. M. Leighton 86 



Powers, S. ; Solitario uplift. Presidio- 

 Brewster counties, Texas 46, 417 



Pre-Cambrian problems ; J. J. Seder- 

 holm 44 



— rocks of Manitoba ; F. J. Alcock and 



E. L. Bruce 40, 267 



— • unconformity in the Black Hills of' 



South Dakota 37 



Preglacial slope and crest of the Ni- 

 agara escarpment; J. W. Spencer.. 55 

 I'RELiMiNARY notes On recent Tertiary 

 collections in the West ; R. W. 

 Chaney 137 



— sketch of the history of the lower 



Missouri ; F. C. Greene 83 



Preparation of a treatise on sedimen- 

 tation ; W. H. Twenhofel 24 



Presidential address by F. B. Loomis 

 before the Paleontological Society. 



131, 187 



■ — I. C. White 42, 171 



Presidio- Brewster counties. Texas,' 



Solitario uplift of 46, 417 



Probability of Pennsylvanian glacia- 

 tion of the Arbuckle and Wichita 

 Mountain regions ; S. Weidman ... 91 



I'ROBABLE cause of the localization of 

 the ma.ior geosynclines ; W. H. 

 Bucher 75 



I'ROBOSCiDEAN remains in Iowa 80 



Proceedings of the First Annual Meet- 

 ing of the Mineralogical Society of 

 America, held at Chicago. Hlinois. 

 December 29, 1920; H. I'. Whit- 

 LOCK, Secretary 163 



■ — Society of Eco- 

 nomic Geologists, held at Chicago. 

 Illinois, December 28-29. 1920 ; .1. 

 Volxev Lewis, Secretary 157 



Thirty-third Annual Meeting of 



the Geological Society of America, 

 held at Chicago, Illinois, I^ocember 

 28-30. 1920; Edmund Otis Hovey, 

 Secretary 1 



Twelfth Annual Meeting of the 



Paleontological Society, held at Chi- 

 cago, Illinois, December 28-30, 1920 ; 

 R. S. Bassler, Secretary 119 



Publication Rules, Changes in 16, 101 



