G16 



BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



Page 

 Theresa quadrangle, Character of lime- 

 stones of 156, 157 



, Dolomite in 160 



.Generalized section of rocks of.. 159 



, Geological map of 158 



, Lowvllle limestone in 163 



— •— , Pamella limestone in 161 



, Potsdam sandstone in 158 



Thomas range, Utah, Topaz-hearing 



rhyolite of the 177-192 



Thomson creek, Plant beds of 371 



Thomson, J. J., quoted on electronic 



theory of matter 121, 122 



— , Reference to work by 114 



Thoridm, Characteristics of 117 



— , Origin of 120-127 



Tight, W. G., Address of welcome 



given by 514 



— differed from In regard to strati- 



graphy of interment plains 75 



— , Discussion by 537, 569 



— , Title of paper by 540-567 



TiLLiTE, Dwvka, Occurrence In South 



Africa of 351 



— , Early Cambrian, Occurrence of. 353-354 



— , Huronian, Occurrence of 355 



— , Permo-Carbonlferous, Occurrence in 



Australia of 350-351 



Todd, Aurelius, Discovery of fossil 



plants by 369 



Topaz-bearing rhyolite of the Thomas 



range. Thickness and character of. 180 

 — , Utah, by Horace B. 



Patton 177-192 



, Structure of 181 



Topaz crystals, Character of rhyolite 



surrounding 186-187 



, Distribution and frequency of . . . 189 



, Illustrations of 184 



of Thomas range, Utah, Location 



of 1'78 



, Weight of 189 



— mountain. Character of rocks of . . . . 180 



, Description of 179-180 



— - — , Occurrence of bixyite in 191 



garnet in 190 



— specular hematite in 189 



, Possible carboniferous age of . . . . 179 



— .Physical characteristics of 183-189 



— , rough opaque. Description of . . . 185-186 



— , smooth opaque. Analysis of 187 



. — , Description of 186, 187 



— , transparent. Description of 184 



Toronto harbor. Formation of . . . . 475-476 

 — , Interglacial formation of 357 



— island. Formation of 475, 476 



in 1793, Plan of 476 



, Map of 476 



Torridonian and Lewisian formations. 



Unconformity of -^' 2^ 



Transportation, Effect on river beds of 199 



TreasureEj Election of 521 



— , Report of ^I'^-^^O 



Trenton limestone, Character of 163 



— , Paleozoic rocks classified as 163 



Trilobit^:, Classification of 549, 552 



Trinity river. Conglomerate on 154 



TschernyscheWj Doctor, cited on gla- 



ciation of Russian conglomerate... 352 

 T0EKET point, location of 482 



Udden, J. A., Title of paper by . . . ." 55 



Uinta mountains. Glacial periods in... 358 

 Ulrich, E. O., Acknowledgments to... 158 

 — cited on fauna of Porcupine valley. 



323, 326 

 — , Fossils of Bighorn limestone class- 

 ified by '*'^^"?ii 



— , Reference to work by 176 



Page 

 Underground water conditions of the 



Jornado del Muerto 66 



— waters, Analvses of 504-505, 507 



.Chemical character of ..505-506,508 



, Classification of 503 



■, Tests made of 508-512 



Union Pacific "cut-o£E" at South Omaha, 



View showing 253 



railroad. Sections of Casper for- 

 mation along 427-428 



United States Geological Survey, Col- 

 lection of fossil plants by 369 



, Committee on pre-Cambrlan of 2 



Upham, Warren, Acknowledgments to. 31 



— cited on Potsdam quartzite 226 



redstone deposits 222 



— quoted on age of basal conglomerate. 229 

 granitic rocks of redstone re- 

 gion 223 



— , Reference to report by 34 



Upper Carboniferous limestone. Charac- 

 ter and thickness of 303 



— Laurentian formation. Discovery of. 2 

 • — Monroe series. Fauna of the. . . . 546-551 



— Yukon, Alaska, Geologic map of.... 278 

 .Paleozoic and associated rocks 



of the 255-314 



.Carboniferous rocks of the.. 291-304 



, Geology of 261-314 



, Ordovician age of rocks of . . . 271-272 



, Pre-Ordovician rocks. Composi- 

 tion of 266-271 



region. Devonian rocks of . . . . 277-291 



, Fossils of 259. 260 



, Geography of 255-256 



, Geological investigations in.. 



256-261 

 .Geologic history of 311-314 



— — — — map of 265 



, Mesozoic rocks of the 304-307 



, Quarternarv rocks of 309-310 



— — — , Structure of rocks of 310-311 



• , Tertiary rocks of 307-309 



, Works relating to 257-260, 266- 



268, 270-277, 281-287. 290-293, 

 295, 297-301, 303-312 



rocks. Correlations of 270 



. Pre-Ordovician age of .... 264-271 



.Silurian rocks of the 272-277 



. Table showing stratigraphlc suc- 

 cession of 262-263 



Uraninite, Discovery of radium in. . . . 114 

 Uranium minerals. Probable age of . . . . 135 



— . Origin of 120-127 



— . Probable life of 116-117 



— , Question of presence in stars of . . . . 126 



— , Weight of 116 



Utah rhyolite, Illustrations of 181 



Valleys of the Minnesota and Missis- 

 sippi rivers 31-33 



Van Htse, C. R., Acknowledgments to.. 501 



— , Address by 538 



— , Classification of pre-Cambrlan by. . . 14 



— , Discussion by 537-539 



— , Presidential address by 1-28 



— , Reference to report by 112 



— , References to work of 502-504 



— , Study of Huronian area by 5, 6 



— , Title" of paper by 3 



— , Vote of thanks seconded by 577 



Van Horn. Frank R., Occurrence of 

 proustite and argentlte at the Cali- 

 fornia mine, near Montezuma, Colo- 

 rado 93-98 



— . Title of paper by 537 



Vermilion Cliff sandstone. Distribution 



of fi2 



, Occurrence of 56 



