INDEX TO VOLUME 30 



643 



Page 

 Silurian- formations of Hudson Bay 



region. Correlation of 3<i ' 



— fossils of Hudson Bay region 353-370 



— of Brazil 207 



— rocks of Hudson Bay region 656 



— , Stromatopora from the 157 



SiNGEWALD, J. T., Jr. ; Sand-chrome de- 



posits of Maryland Ill 



SiNNOTT, E. W., cited on evolution of 



herbs • 528 



Smith, G. O. ; Military contribution of 



civilian engineers 79, 399 



— ; The economic limits to domestic in- 

 dependence in minerals 98 



Smith, G. S. ; American mapping in 



France HO 



Smith, P. S., Reference to war work 



of 176-181 



Smith, W. D. ; Geology as a synthetic ' 



science '^'^ 



— ; War work of the Department of 

 Geology at the University of Ore- 

 gon 83 



SocifiTfi Geologique de France. Cable- 

 gram of congratulations to 116 



Solomon. , cited on war geology. . 169 



Some problems of the Adirondack Pre- 



cambrian ; H. L. Ailing 155 



international readjustment of 



mineral supplies as indicated in re- 

 cent foreign literature ; E. F. Bliss 101 

 Sources and tendencies in American 



geology : T. Barrell 77 



South America, Age of plant-bearing 

 beds and associated marine forma- 

 tions in 153 



Spurr. J. E. ; Commercial control of the 



mineral resources of the world. . . 108 



— , Reference to war work of 177 



Stanton, T. W.. cited on .Turassic faunas 520 

 Stoller. .T. H. ; Topographic features 

 of the Hudson Valley and the ques- 

 tion of postglacial marine waters 

 in the Hudson-Champlain Valley . . 



90. 415 



Stone, R. W. ; Magnesite industry 115 



— ; Phosphate rock an economic army . 104 



Stratigraphic geology of Brazil 203 



Stratigraphy and correlation of the 

 Coal Measures of Maryland ; C. K. 

 Swartz. W. A. Price. .Jr.. and Har- 

 vey Bassler 154 



— — structure of the Newark system in 



Maryland and its relation to the 

 Newark system of eastern North 

 America ; G. E. Dorsey 155 



— of Coal Measures of Maryland ...... 570 



Paleozoic rocks of Hudson and 



.Tames bays 339 



— , Significance of Sherburne sandstone 



in Devonic 423 



Structure of the Pacific ranges, Cali- 

 fornia ; B. Willis 84 



Stromatopora growth on edge-on con- 

 glomerate from the Silurian ; .T. M. 

 Clark 157 



Subterranean "chalk streams" of north- 

 ern France ; E. M. Burwash 91 



Supai fauna 491-492 



Swartz, C. K.. W. A. Price, Jr., and 

 H. Bassler ; Coal Measures of 

 Maryland 567 



— : Stratigraphy and correla- 

 tion of the Coal Measures of Marv- 

 land .■ . 154 



— and Harvey Bassler ; Typical sec- 



tion of the Allegheny formation. . . 153 



Taber. S.. and H. F. Reid ; Recent earth- 

 quakes of Porto Rico 83 



Page 

 Tarr, R. S., cited on Cape Ann gravel 



bars 609 



Tarr, W. A., Contribution to the origin 



of dolomite 114 



Tertiary floras 528 



— of Brazil 221 



The American topographer in the role 



of artillerv orientation officer ; 



F. E. Mattlies HO 



— economic limits to domestic independ- 



ence in minerals ; G. O. Smith. ... 98 

 Thin horizons. Remarkable persistence 



of 157 



Trinidade, Geology of 299 



Topographic features of the Hudson 

 Valley and the question of post- 

 glacial marine waters in the Hud- 

 son-Champlain Valley ; J. H. Stol- 

 ler 90,415 



, Bibliography of 421 



— mapping 110 



Treasurer-'s report 7 



Triassic and early Jurassic time. Earth 



movements in 516 



— floras 515 



— of Brazil 220 



Tyndall, , cited on cause of gla- 



ciation 557 



Typical section of the Allegheny for- 

 mation ; C. K. Swartz and Harvey 



Bassler 153 



Tyrrell. .7. B.. cited on Hudson Bay 



limestones 355 



— — — Ordovician 343 



Udden, J. A. ; Anticlinal theory as ap- 

 plied to some quicksilver deposits. 112 

 Uhler, R. R., cited on Sankatay Head 



sands 608 



Ulrich, E. O., cited on argillites 552 



geologic climates 545, 560 



Umpleby, J. B. ; World view of mineral 



wealth 107 



United States, Clays of the 95 



Geological Survey as a civic insti- 

 tution during the war : S. Paige . . 78 

 University of Oregon, War work of... 83 

 Upper Cretaceous time. Climate of . . . 525 

 floras 524 



Van Tuyl, F. M., cited on Chemung 



fauna 465 



— and R. C. Moore ; Late Mississippian 



organic movements in North Amer- 

 ica 88 



T. E. Savage ; Geology and stra- 

 tigraphy of the area of Paleozoic 

 rocks in the vicinity of Hudson and 

 .Tames bays 339 



Vanuxem, , cited on Sherburne 



sandstone 423 



Vaughan. T. W. ; Presentation of geo- 

 logic information for engineering 

 purposes 79 



Walcott, C. D., cited on Algonkian 



algal flora 506 



Walther, ■, cited on geologic cli- 

 mates 553 



War geology. Review of 165 



— work by the Department of Geologv 



at the Universitv of Oregon ; W. D. 

 • Smith 83 



— time development of the optical in- 



dustry ; F. E. Wright 103 



Watson. T. U.. Reference to war work 



„ of 177 



\\ iiiTE. C. A., cited on I'ermo-Triassic 



fossils 489 



