INDEX TO VOLUME 21 



813 



Page 

 Mineralogy, Note on a method in teach- 

 ing optical ; F. W. McNair 31 



MiNGAN and Anticosti islands, Fossils 



of 678-716 



, Ordovicic-Siluric section of. 75, 



677-716 

 , Paleozoic strata of 681 



— islands, Beekmantown deposits seen 



in 683 



, Comparative age of Fort Cassin 



beds, lake Champlain area, and 



Beekmantown strata of 688 



-^ formation. Correlations of 692 



, Thickness and general character- 

 istics of 688 



, Zones and description of . . . . 689-693 



— islands, Ordovicic system, Chazian 



and Mohawkian series 688 



, Stratigraphic sequence from Que- 

 bec shore to 682 



succession, Canadic system, Beek- 

 mantown series 686-688 



in 683-693 



Minneapolis meeting for considering 

 organization of a geological society. 



Final committee appointed at 744 



the advancement of science 



August, 1883, Report of committee 

 on establishment of a geological so- 

 ciety and a geological magazine to. 744 



, Geologists present at 744 



Minnesota, Red sandstones of south- 

 eastern 30 



Mississippi river. New development at 



the mouth of 791 



MississippiAN limestone of Wasatch 

 mountains, A non-marine member 

 in 528 



— rhynchonelloid shells. Internal char- 



acters of some 76, 498-516 



— shales, Wasatch mountains " show 



wide distribution of 529 



Missouri, Natural bridge in Miller 



county 332 



Green county 329 



MOLLUSKS, Aftonian 121, 132 



Monilipora prosseri, Fossil of Wasatch 



region 530 



Montana, Origin of Cliff lake 26, 764 



— , Stratigraphic relations of the Liv- 

 ingston beds of central 31, 781 



MoNTESSus DE^ F. DE Ballore, cited on 



Alaskan earthquakes 397 



date Alaskan earthquake 341 



Montreal meeting 1882, Oflacial report 



of the Cincinnati meeting at 743 



for considering question of organ- 

 izing an American Geological So- 

 ciety, List of persons present at. . . 743 



of the American Association for 



the Advancement of Science Au- 

 gust, 1882, at 743 



— river. Diversion of the 21, 762 



Moose nose and Oak hummock, Winni- 

 peg, Esker and kame deposits of . . . 



424-427 

 Morgan formation, Wasatch region, 



Composition and fossils of . . . . 529, 530 

 Morphology, Contributions from pale- 

 ontology to ; William Bullock Clark 74 



Mount Morgan, Red beds near 529 



, Utah, Location of 529 



Mountain glaciation, Iceland groups of. 718 

 Mountains^ Basin-range type of. . . 543, 544 



— of the desert region. Changed views 



of origin of 544 



MUCKERMANN^ HERMANN, cited on ant- 

 hills in western Wisconsin 451 



MuiR glacier. Reports of recession of. . 368 

 MuNN, John Malcolm, elected Fellow. 4 



Page 



Murray, Sir John, cited by Goodchild 

 on areas of "inland drainage" in 

 Britain 652 



— , Reference to his "Bathymetrical 



chart of the oceans" 200 



— and Renard. Reference to Challenger 



report on deep-sea deposits of 644 



Natural bridge and natural arch. Dif- 

 ference between 314 



across Kicking Horse river. Dia- 

 gram of, figure 6 322 



, near Field, British Co- 

 lumbia, Description of and view 

 showing, plate 20 321, 322 



Swifts Camp creek, Description 



of and diagram indicating origin of 315 



• — , View showing, plate 



18, figure 1 315 



at Attica, Indiana 317 



Natural Bridge station, Powell 



county, Kentucky, Description of 

 and views showing, plate 22 . . 324, 325 



, Big Bad Lands, South Dakota, 



Description of and view showing, 

 plate 23 325, 326 



, Definition of 314 



formed by gravity, Big Horn 



mountains, Wyoming, view show- 

 ing, plate 26 331 



, Diagram showing, figure 



10 333 



in Bad Lands, South Dakota, De- 

 scription of 315, 316 



— of South Dakota, View 



showing, plate 18, figure 2 315 



— North Adams, Massachusetts, 



Description of, view showing 328 



, Lookout mountain, Tennessee, De- 

 scription of and view showing. 327, 329 



, Miller county, Missouri, Descrip- 

 tion of 333 



near Pine, Arizona, Description of 



335 336 



of Buffalo Gap, South Dakota,' 



Description of 320 



Le Perle Creek, Wyoming, De- 

 scription of 320 



the Emme valley, Switzerland, 



Description of. View showing, fig- 

 ure 11 334 



over Lamoille river, Vermont, De- 

 scription of and view showing, 

 plate 20 321, 322 



, Perch river, Section of (after 



Ruedemann), figure 9 330 



, Petrified log 323-325 



, Powell county, Kentucky, Map 



indicating formation of, figure 7 . . . 325 



, Santa Cruz, California, Descrip- 

 tion of and view showing. . . . 326, 327 



■ station, Powell county, Kentucky, 



Natural bridge at 324, 325 



, The Oklahoma, Description of... 327 



, Virginia 327 



— — , Yellowstone national park 322 



— bridges bv stream erosion 314-326 



, Catalog of North American. . 337, 338 



, Formation of, from the "Re- 



. mains of a great cavern." Dia- 

 gram indicating (Shaler), figure 8. 330 



formed by pot-hole action 321 



. Green county, Missouri, Descrip- 

 tion of 329 



in western Oklahoma 333 



initiated by solution 327-333 



wave action 326, 327 



, Jefferson county, New York 332 



of Florida, Description of 331 



LVI— Bull. Geol. Soc. Am., Vol. 21, 1909 



