INDEX TO VOLUME 2.7 



733 



Page 



Pleistocene, Arid zones of 180 



— ■ deformation of Ontario basin, Table 



showing 244 



— deposits of Minnesota and adjacent 



districts ; Prank Leverett '. 6S 



— drainage changes in western North 



Dakota ; Arthur G. Leonard 80, 295 



— features in the Schenectady - Sara- 



toga-Glens Falls section of the Hud- 

 son Valley ; Herman L. Fairchild. . 65 



— ice age 183 



— ■ isobases 253 



— mammal fauna of Hawver Cave, a 



Assure deposit near Auburn, Cali- 

 fornia ; Chester Stock 169 



■ — map 253 



— rodeo. Fauna of 1«Q 



— species, Paro californirvs 171 



— uplift in New York, BibHography of. 255 

 — ■ — of New York and adjacent terri- 

 tory ; Herman L. Fairchild 66, 235 



— valley of Missouri and Yellowstone 



rivers 299 



— val'eys in western North Dakota, 



Photographs of 299 



of western North Dakota, Outline 



map of 297 



Pliocene Jacalitos formations, Verte- 

 brate faunal zones of 172 



— monodactylons horse 151 



— of Pacific coast 172 



Pogue, Joseph E. : Emerald deposits of 



Muzo, Colombia 63 



Porto Rico, Geologic history of 83 



Position of the New England upland 

 in the White Mountains ; Armin K. 



Lobeck 108 



Posn.tak, Eugen, and H. E. Merwtn ; 

 Definition and determination of the 



mineral hydroxides of iron 61 



Postglacial age of lower Little Mis- 

 souri Valley, Evidpnce of 302 



Post-Lacustrine deformation 668 



Powell, J. W., cited on monoclinal 



fold 90 



Powras. S t dnf.y : Tectonic lines in the 



Hawaiian Islands 109 



Pratt, Joseph Hyde ; Memorial of 



Josenh Austin Holmes 22 



Precambrian deserts. Late 182 



— granite. Intrusion of Black Hills. . . . 104 



— ice age. Late 18G 



— rocks. Origin of foliation in New 



York of 57 



— structure of the Black Hills, South 



Dakota ; Sidney Paisre 106 



Preglactal valley of the Little Mis- 

 souri River 300 



Pre-Hurontan land conditions 18S 



Preliminary geologic map of the Wa- 

 yan quadrangle, Idaho- Wyoming ; 

 George R. Mansfield 65 



— report of the committee on the 



nomenclature of the skull elements 

 in the Tetrapoda ; W. K. Gregory. . 152 

 Pre-Onondaga jointing at Amherstburg, 



Ontario, Photograph of 74 



Presence of a median eye in trilobites ; 



Rudolph Ruedemann 146 



Presidential address by A. P. Coleman. 175 



, Reference to 82 



— E. O. Ulrich, "The use of fos- 

 sils in correlation" 149 



Prestwich, , cited on monoclines. 91 



Pre-Triassic basement. Character of.. 688 

 Principles governing the use of fossil 

 plants in geologic correlation ; F. 



H. Knowlton 525 



Proceedings of the seventh annual 

 meeting of the Paleontological So- 

 ciety, held at Washington, District 



LIII — Bull. Geol. Soc. Am., Vol. 27, 1915 



Tage 



of Columbia, December 29, 30, and 

 31, 1915: R. S. Bassler, Secretary. 139 



— ■ twenty-eighth annual meeting 



of the Geological Society of Amer- 

 ica, held at Washington, District 

 of Columbia, December 28, 29, and 

 30, 1915; Charles P. Berkey, Sec- 

 retary pro tern l 



Prosser, , cited on article on 



Tipper Siluric strata 72 



Prodty.W. F., and C. K. Swartz; Silu- 

 rian system of Maryland 89 



— ; Crystalline marbles of Alabama. 63, 437 

 Pumpelly, R., cited on Keweenaw series 94 

 Pyroxene syenite, Hypersthene syenite 



compared with 212 



of Adirondacks compared with 



hypersthene svenite 212 



Pyroxenite, Analyses of 232 



— •, Character of . . 231 



— , Composition and classification of. . . . 232 

 — , Reference by Watson and Cline to . . 231 



Quarry methods 448 



Quartz - bearing hypersthene - andesine 



syenite 197 



igneous rocks 331 



— ■ monzonite compared with hypers- 

 thene syenite 204 



— - monzonites, Analyses of 205 



Quaternary - tertiary orogenic history 



ot the Sierra Nevada 46 



Quereau, E. C, cited on glacial lakes 



in the Adirondacks 660 



Quirke. T. T., cited on topography of 



Kildeer Mountains 304 



Radium referred to by Van H. Manning 25 



Ramsay, , cited on English boulder 



conglomerates 184 



— — - — Lower Silurian. 558 



Old Red Sandstone 379 



Rancho La Brea, Bison of 170 



, Mylodont sloths of 170 



Raymond, P. E., cited on "Linsen" .... 599 



Orthoceras limestone 601 



proposed name "Walchoic for- 

 mation" 598 



— , Reference to "The correlation of the 

 Ordovician strata of the Baltic 

 basin with those of eastern North 



America" of 590 



Recent studies on skull structure of 

 Thalattosaurus ; John C. Merriam 



and Charles L. Camp 171 



Recession of Niagara Falls remeas- 



ured in 1914 ; J. W. Spencer 78 



Reconstruction of extinct animals. . . . 153 

 Rectilinear features in the eastern 



Catskills ; George H. Chadwick. ... 107 

 Red beds of Wyoming, Lithogenesis and 



stratigraphy of 120 



Reeds, Chester A. ; Stages in the geo- 

 logic history of Porto Rico 83 



Reef deposits and the formation of 



Paleozoic limestones 147 



Register of the Washington meeting, 



1915 '. 125 



of Paleontological Society, 



1915 162 



Regolith, Relations to maximum epi- 



rotic deposition of desert 57 



Reid, H. P., cited on Old Red Sand- 

 stone 349 



Relationships of the invertebrates to 

 the vertebrate faunal zones of tne 

 Pliocene Jacalitos and Etchegoin 

 formations at Coalinga, California ; 

 J. O. Nomland 172 



