INDEX TO VOLUME 13 



581 



Page 

 Spirifer mucronatus var. arkonensis var. nov., 



Description of. 17U-171 



thedfordensis var. nov., Description 



of. 171-176 



Spring deposits, Photographs of, Catalog 



of. 470-471 



Springs, Photographs of, Catalog of 470 



Split-six coal, Allegheny formation of Mary- 

 land, Character, position and thickness 



of. 221 



Spurr, J. E., cited on geology of south- 

 eastern Alaska 254 



Stadling, J., cited on gravel deposits in 



Asia 137 



Stanley-Brown, Joseph, Editor's report by 



483-485 



— , elected Editor 487 



— , Photographs by, Catalog of 383 



Stanton, T. W., Fossils identified by 248 



— , quoted on Cretaceous fossils from Mon- 

 tana 327 



— , Work of 110 



Stanton, mount, Diagram of. 330 



Steiger, George, Analysis by 364 



Stevenson, J. J., cited on limestone of 



Glacier bay, Alaska 258 



— , quoted on fossil coral from the moraine 



of Dirt glacier 259 



— , Record of remarks by 521, 530 



Stevenson, W. C, Photographs by, Catalog 



of 429 



Still rivers of western Connecticut; William 



Herbert Hobbs 17-26 



Stillman, J. M., quoted on borra 74 



Stoddard, S. R., Photographs by, Catalog 



of 395, 407, 409, 414, 422 



Stoiber, G. H., Acknowledgment to 5 



Stokes, H. N., Analysis by 365 



Stones River group, Definition of. 12 



Stose, G. W., Work of. 104 



Stratigraphy and structure, Lewis and 

 Livingston ranges, Montana ; Bailey 



Willis 305-352 



Streams of South Dakota, Characters and 



courses of.... 30-40 



Strije, Photographs of, Catalog ol 453 



Structure, Columnar, Catalog of photo- 

 graphs of 452 



Stuver series, Alaska, Age of..... 241 



, Character and occurrence of. 240 



, Structure of 240 



Sumner, H. G., cited on geology of Parahyba 56 



— , Fossils found by 42 



Superior, Lake, Origin of basin of. 295 



Sutton, W. J., elected Fellow 2 



Swallow, G. C, cited on fauna of the Ozark 



region 287 



the geologic succession in Missouri. 276 



Swan Creek formation, Tennessee, Occur- 

 rence and character of 14 



— — phosphate, Geologic place of 11, 13 



Sweet, E. T., cited on junction of Lake Su- 

 perior sandstone and Keweenawan traps 7 

 Sweetland beds, Iowa, Stratigraphic place 



ot 272, 280 



, Thickness of. 281 



Swift Current pass, Lewis range, Montana, 



Views at 330 



valley, Views in 311 



Sylamore sandstone, Arkansas, Age of.. 288, 289 

 , Position and thickness of. 274 



Taff, J. E., Photographs by, Catalog of. 404 



— , Work of. 106 



Taylor, F. B., Work of. 104,105 



Taxonomic table of the Potomac group 190 



Tejon formation, California, Character and 



thickness of. 545 



Tennessee, Geological formations in, Classi- 

 fication of 10-14 



Page 

 Tennessee, Geological formations in, Table 



of 10-11 



work in 105, 108 



— , Phosphate rock in, Horizons of 14-15 



— , Photographs from, Catalog of. 433 



Tepee buttes, Photographs of. Catalog of..... 471 

 Tertiary lake beds, Montana, Occurrence 



of 3^7-328 



— rocks, Alaska, northern, Occurrence 



of 248-249 



, southeastern, Occurrence of 260-261 



, Brazil, near Pernambuco, View show- 

 ing 86 



, Montana, Character and occurrence 



of...... 315 



Texas, Geological work in 101, 107, 108 



— , Photographs from, Catalog of. 433 



— Geological Survey, Photographs by, Cata- 



log of 433 



Thi dford region, Canada, Fossils from.. 151-159, 



166, 167-185 



, Hamilton group of. 149-186 



, Sections of Hamilton group in 150-159 



, Table showing distribution of species 



in a 179-185 



— section of Hamilton group, Fossils 



from 150-152 



Third annual meeting of Cordilleran sec- 

 tion, Proceedings of. 539-546 



Thirteenth summer meeting, Proceedings 



of. : i-i6 



Tilghmans island, Maryland, Record of well 



at 211 



Todd, J. E., Hydrographic history of South 



Dakota 27-40 



— , Record of discussion by ., 2 



— , Title of paper by 2 



— , Work of 106 



Totsen series, Alaska, Age of. 240 



, Character and occurrence of. 239 



, Structure of 240 



Trachytes, in Pernambuco, Brazil, Char- 

 acter of. 59-60 



Tracy City formation, Tennessee, Geologic 



place of 10,13, 14 



Traverse group of Michigan [abstractj ; 



A. W. Grabau 519 



Treasurer, Election of 487 



— , Report of. 481-482 



Trenton formation in Canada, Position and 



character of. 518 



Triassic period, Orogenic movements dur- 

 ing, in South Dakota 28 



— rocks, Alaska, southeastern, Occurrence 



of 260 



, Montana, Occurrence of 325-326 



Tullahoma limestone, Character and thick- 

 ness of. 13 



Tufaceous lake-beds, Photograph of cata- 

 logued 471 



Tunis Mills, Md., Record of well at 211 



Turkestan, Loess plains in 135 



Turner, H. W., elected chairman of Cordil- 

 leran section 541 



— , quoted on granite from cape Santo 



Agostinho 61-62 



mouth of Riacho Doce 64 



Pedra do Porto 63 



rocks of Santo Aleixo 62 



— , Photographs by, Catalog of 387, 392-393, 



413-414 



— ; Post-Tertiary elevation of the Sierra 



Nevada 540-541 



— , Title of paper by 540 



Tyrrell, J. B., Photographs by, Catalog 



of 393-394 



Tyson, P. T., cited on taxonomy of the Poto- 

 mac group 190 



Tyson (Upper Sewickley) coal, Monongahela 

 formation of Maryland, Character and 

 occurrence of 229 



