I^'DEX TO VOLUME l8 



ro7 



Pase 

 Newlaxd^ Davis Hale, elected Fellow. 570 



— , Title of paper by 644 



New Loxdox, Double glaciation at.... 509 

 New Madrid earthquake, The, by JI. L. 

 Fuller and E. M. Shephard (ab- 

 stract) 610 



'New Mexico, Afton craters of south- 

 ern 211-220 



. — , Volcanic necks of Mount Taylor re- 

 gion 303-324 



Newso.m. John F. ; Notes on the struc- 

 ture of the Santa Cruz range, Cali- 

 fornia (abstract) 657 



— (and Koderic Crandall) ; Notes on 



the geology of the Mount Hamil- 

 ton quadrangle (abstract) 661 



— ; Notes on the topography of the 

 Seward peninsula, Alaska (ab- 

 stract) 657 



Newton. Hexry, cited on his section 



at Wegee. Ohio 133 



in Belmont county, Ohio. 131 



— , Section at Knoxville, .Jefferson 



county, measured by 66 



Newton. New Hampshire, Old till ex- 

 posures at 516 



New VBitxoN, Correlation of trap ridge 



of lf)6 



— trap. Occurrence and character of.. 203 

 New York meeting. Record of Fellows 



attending 655-656 



— state, Calcite crystals in 644 



New Zealand, Former connection with 



Australia of 236 



'Nickel-Iron oxides. Character of. 499. 500 

 , Occurrence at Meteor crater, Ari- 

 zona, of 499-.500 



NiLES. W. H.. cited on interglacial 



soils at cape Breton 509 



— , Pleistocene fossils at Fort Warren. 



noted by 509 



NiNEVAH coal bed. Occurrence of.. 109, 119, 



122, 130, 133 



— limestone. Characteristics of... 107,163 

 . .Occurrence of 105,106,108,109, 



117, 119, 120, 123, 125, 

 127, 128, 138, 141, 163 

 , Variations between Upper Wash- 

 ington and 108 



— sandstone. Occurrence of 109. 119, 



122, 163 



Noble county. Ohio. Section in 42 



NoGROTOWN point. New Brunswick, Sec- 

 tion at 538 



, Stratified clay at 509 



Normal pressure faulting in the Alle- 

 gheny plateaus, by George H. Ash- 

 fey '. . ' 626 



North America. Analysis of the ge- 

 ologic structure of 393 



— . — . A' theory of continental structure 



applied io 389-412 



.Critical structural periods of... 393 



.Effects of erosion on 390 



. Explanation of geologic phenom- 

 ena in 412 



— . — . Hypothesis of continental struc- 

 ture of 390-393 



, Negative elements of 398-401 



, Positive elements of 393 



. Zones of intrusion in 408-411 



North A.merican continent. Area and 



depth of 389 



.Effect of compression on 412 



, Effects of stratification in.... 391 



. Heterogeneity of 389, 390 



■ — Atlantic, Theories of formation of.. 



238, 239 

 Northeastern New England, Complex- 

 ity of the Glacial period in . . . 507-555 



Page 

 Northern panhandle of West Virginia, 



Monongahela formation jn the . . . 64-65 

 NoRTHFioRD, Characteristics of ... 414,415 



— , Effects of glacial erosion in 426 



— , Glacial erosion in the 413-426 



— , Measurements of 414-415 



Norton. W. H., cited on geology of 



Mount Taylor region 804 



— , Reference to descriptions by 192' 



Norway. Sketch map of great fiords of. 414 



— (West), Presence of cross-fiords in.. 423 

 Norwegian streams. Evidence of ero- 

 sive activity of 42(> 



NovAcuLiTE area. Occurrence of 406 



Nova Scotia, Probable age of the Me- 



guma (gold-bearing) series of.. 636-637 



NuBi.\, Occurrence of strata of the Per- 

 mian age in 387 



Nuciikt eximnsa. Location of 522-523 



— tenuis, Location of 522-523 



NuNATAK glacier, Changes in 261 



Ocean basins. Arguments for antiquity 



of 233, 234 



, Deep sea deposits in 235 



. Faunal and floral distribution 



In 235, 236 



of the secondary era 241, 242 



, Origin of 233-250 



, Refutation of arguments for an- 

 tiquity of 234-236 



Ocea.nic revolutions of the Permian 



and Algonkian times 250 



Officers and Fellows, List of.... 681-692 



— . Election of 569-570 



Ogden quartzite. Correlation of 301 



— — , Uinta range, Age, character, and 



thickness of 432 



— • — , Wasatch section. Age, character, 



and thickness of 432 



Ogilvie, Ida Helen, elected Fellow... 570 

 O'Harra. C. C, cited on his measure- 

 ments in Allegany county 45 



Waynesburg coal bed 47 



Ohio coal area. Original character of.. 147 



— , Mississippi formation in 142 



— , Monongahela formation in.... 30,64-65 

 — , Occurrence of Benwood limestone 



in 38 



— Fishpot limestone in 35 



Little Waynesburg coal bed in. 42 



Lower Sewickley coal bed in.. 36 



Pittsburg coal bed in 32 



Pittsburg sandstone in 34 



Redstone coal bed in 35 



limestone in 34 



Rockcastle sandstone in 145 



— Sewickley sandstone in 36 



— Uniontown coal bed in 39,40 



limestone in ,39 



sandstone in 41 



^ Waynesburg coal bed in. 42.43,44 



limestone in 42 



— , Red beds in 110 



— .Upper Sewickley coal bed in 36.37 



Old tills. Descriptions of 514 



Olden lakes. Sketch map of the 415 



Oolitic limonite. Occurrence of 181 



Ophitic texture ; A. C. Lane (ab- 

 stract) 648 



Orange glacier. Condition of 265 



Ordonez, E.. cited on rocks of Mexico 



and Central America 397 



Ordoviciax Ogden quartzite. Descrip- 

 tion of 437 



, Nomenclature and correla- 

 tion of 436, 437 



— rocks, Composition of 251 



