814 



BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



I'age 

 Natural bridge of Jackson county, 



Iowa. Description of 332 



North America ; Herdman F. 



Cleland 22, 314-338, 765 



San Juan county, Utali, De- 

 scription of and views showing, 



plate 19 317-321 



southeastern Utah, Directions 



for reaching 317 



the Tamina valley, Switzerland 333 



, Travertine-cemented 323 



— gas. See Gas, natural. 

 Nebraska and Iowa fossiliferous sand 



and gravel beds, Evidence they are 

 Aftonian 31 



Nebraskan drift, Name given to the 



pre-Kansan or sub- Aftonian 128 



Nelson, E. W., cited on geology of the 



Bahamas and coral formations .... 646 



Nelsonite : A new rock type, its oc- 

 currence, association, and compo- 

 sition ; T. L. Watson and S. Taber. 33 



Nephelite syenite. Areas of 90 



New Mexico, Deposit of gypsum sand 



near Almogordo 647 



, (southeast) and western Texas, 



Notes on the upper carboniferous 



in 76 



New York, Columbia county, Richmond 



boulder train in 747 



, Natural bridges of Jefferson 



county 332 



, Preglacial drainage of central 



western 31 



-— Zealand, Average elevation of moun- 

 tain uplands in 720 



Niagara district. Forest glen and older 



epochs of 437 



— falls, Fluctuations of 447, 448 



, Partial drainage of, in February, 



1909 ; J. W. Spencer 26, 447-448 



, Rate of recession of American . . 



441-443 

 "Niagara period," J. D. Dana extended 



term "Niagara group" to 680 



Niagara, Relative work of the two falls 



of (extempore) ; J. W. Spencer. 22, 763 



— river, Relationship to the glacial 



period of the; J. W. Spencer 26, 



433-440, 763 



— — , Studies of the Whirlpool-Saint 



Davids valley 433 



NiAGARAN (Anticostian) series, Anti- 



costi island 704-716 



NoNNEZosHi natural bridge, Utah, Dis- 

 covered by Utah archaeological ex- 

 pedition 318 



North Adams, Massachusetts, Marble 



natural bridge in 328 



— America, Map showing locality of 



five great earthquakes of 342 



— -American natural bridges, Catalog 



of 337, 338 



— America, Natural bridges of 22, 



314-338, 765 



.Relation of, to Eurasia 201-205 



Norton, W. H., cited on natural bridges 329 

 Nova Scotia, Barite deposits of Five 



Islands 33, 786 



Oahu, Nephelite and feldspar basalts 



of 89 



Oak hummock and Moose nose, Winni- 

 peg, Esker and kame deposits of. . 



424-427 



Oberlin quadrangle, Ohio, Shorelines 



of the glacial lakes in the 21,762 



Observatory mountain, Ogden peak, 



synonymous with 537 



Page 

 Obsidian from Hrafntinnuhryggur, Ice- 

 land ; Fred E. Wright 32, 784 



Oceanic deeps, Frontal 200, 201 



Ocean, Present figure of 222 



Officers and members of the Paleon- 



tological Society 83-86 



— , Correspondents, and Fellows, List. . 



of 53-68 



— , Election of 2 



— of Cordilleran Section, Election of.. 790 

 Ogden peak, "Observatory mountain" 



synonymous with 537 



— quartzite. Age and classification of. . 526 

 — , Utah, Geologic map of vicinity of. . 535 

 Ohio, Chagrin shales, local anticlines 



in, at Cleveland 24, 771 



— , Shorelines of the glacial lakes in 



the Oberlin quadrangle 21,762 



Oklahoma, A progress geologic map of 



29, 777 



— , Natural bridge near McAlester 327 



bridges in western 333 



Okoboji, Location of lake 122 



Olenellus fauna of the Wasatch re- 

 gion, Appearance of 520 



Oldham, D. W., quoted on use of seis- 

 mograph 386 



— , Time of Yakutat Bay earthquake 



computed from seismograms by . . . 386 



Oldham, R. D., Acknowledgment to... 339 



— , Origin of Alaskan earthquakes 1899 



located from seismograph by 376 



— , Reference to seismographic studies 



on Alaskan earthquakes 375 



Omori, F., Origin of Alaskan earth- 

 quakes 1899 located from seismo- 

 graph by 376 



— , Reference to seismographic studies 



on Alaskan earthquakes 375 



Oncoceras fume beds, Anticosti island. 714 



Ontario division, Clarke and Schu- 



chert. Use of term 680 



, Medina, Clinton, and Niagara 



group termed 680 



— , New Cystid from the Clinton forma- 

 tion of 76 



Ontogeny and paleontology ; F. B. 



Loomis and Amadeus W. Grabau. . 74 



Oolite (great) formation (Jurassic) of 



England, Origin of 647 



Oolites, Origin of Monroe 645 



Oolitic sand, Great Salt lake, Utah. . . 645 



Ordovicic-Sildric section of the Min- 

 gan and Anticosti islands ; Charles 

 Schuchert and W. H. Twenhofel . . 



75, 677-716 



Ordovicic system, Anticosti island. . . . 693 



Oregon, Contribution to the geology of 



eastern 791 



Organic sand type. Description of. 643-647 



Organisms, Anatomy and physiology 



in extinct 74 



Ordovicic-Sildric section, Anticosti 



and Mingan islands 677-716 



"Origin of beach cusps ;" J. C. Bran- 



ner. Reference to 601 



the alkaline rocks ; Reginald A. 



Daly 87-118 



earth's plan. Bearing of the 



Tertiary mountain belt on 179-226 



Great Basin ranges. Views of 



geologists on 545 



Orthis sp.. Fossil of the quartzite at 



Geneva 527 



Orthoclase fragment bent at 1200 de- 

 grees under load, plate 3 147 



— , Melting curves of, figure 5, showing 160 



Orton, Edward, Jr., elected Fellow... 4 



