562 



INDEX. 



444 

 59 



Page. 



Rhyolite-pumice 277,284 



Rhytophorus meekii 444 



priscu* 



Ribs of Hespfrornis 



Richmond Mine, Cambrian fossils inlime- 



stoneof 258 



Mount, Altitudeof 246 



, Augite-andesito of 278, 282 



Rickard, R. , Aid rendered by 243 



Rise and fall of Lake Lahontan, Curre ex- 

 hibiting the (Fig. 51) 221 



Riseoidse 465 



Roberts Teak Mountains, Devonian lime- 

 stone of 267 



Romiuger, Carl, cited 329 



, referred to 147,148 



Ruby Hill, Magnesiau limestone of 255 



.Mines of 247 



, Prospect Mountain, quartzite of 254 



, Rhyoliteof 282 



Russell, I. C., Sketch of the geologic his- 

 tory of Lake Lahoutan, by 195 



, , Work of xvi 



Saganaga Lake, Crystalline schists of. ... 169 



Sapinaw glacier 327 



Saint Croix River, Wis 174,177 



- , Kewe-nawan rocks of. .123, 133, 137. 156 



Valley, Wis 187 



, , Copper in 187 



Ignace Island, Lake Superior 126, 176 



John's ridge 332,338 



Louis Rirer.Minn 105, 137, 141, 144, 



162, 175 



, , Animikie group on 162 



,, Coarse gab bro of 142,144 



, , Gabbro dikrs in slate of 162 



, , Red porphyries of 144 



, , Relations of Keweenawan and 



Huronian rocks on 142 



, .Slates of 137,141,175 



Mary'sridge 336 



River, Minn 103 



Saline deposits of Lake Lahontan 224, 230 



Salinity of Great Salt Lake 212 



theDeadSea 212 



Salisbury, R. I)., cited 350, 357, 360, 375 



Salt-works in Lake Lahontan Basin 225, 228 



Salts in Lake Lahoutau Basin 224, 230 



Sand Spring Salt Works 227 



Sandstones of Keweenasv Series 98 



Sault Ste. Marie 140,176 



Scapular arch of Hesperornis 57 



Ichthyornis 73 



Sccnrlla conica 257 



Schell Creek Range, Pogonip limestone of. 261 



Schizodiis cuneatus 269 



Scioto glacier 338 



Secret Cafion shale 255 



Section, Generalized, of bank of Truckeo 



River near Indian Agency ... 223 

 , , a tufa dome of Lake Lahontan 



Basin (Fig. 50) 219 



, Ideal, 'illustrating canons of Coraon 



River (Fig. 53) 224 



, , of a spring deposit (Fig. 49) , , . 219 



Page. 

 Section, Ideal, of Basin Range Structure 



(Fig. 44) 202 



illustrating the relations of the Lahon- 



tan tufas (Fig. 48) 216 



of Quaternary strata at Mill City, Nov. 



(Fig. 52) 222 



reservoir and vats ar Eagle Salt 



Works, Nev. (Fi-. 54) 227 



Sedimentary deposits in Lake Lahontan . 221, 224 



Selwyn; A. R. C. , referred to 124 



Shells of fresh-water gasteropods in Lake 



Lahontan deposits 213,221,223 



Shore currents, W ork of . 207 



drift, Nature of 207 



embankments, Ideal plat illustrating 



(Fig. 46) 207 



, T he formation of 206 



SierraCanon, Dacite of WB 



Silica in augite-andesite, Percentage of . . 287 



Silurian rocks, Eureka District 260 



Silver Creek, Minn 110 



Islet Landing, Canada 160 



Mine, Canada 161 



Mountain, Mich 139 



Silverado and County Peak group 250 



Size of Hesperornis 65 



Sketch of the geologic history of Lake 



Lahontan, by I. C. Russell 189 



Skull of Ichthyornis 70 



Smock, J. C., cited 302, 345, 346, 369, 377 



Snake River, Minn 187 



Soils near Denver studied xvi 



South copper range, Mich 122, 147, 152, 155 



shore of Lake Superior, Keweenawan 



rocksof 139 



, Scenic characteristics of ... 140 



Sphcerium formosum 439 



idahoense 440 



planum 439 



recticardinale 439 



rugosum 440 



subellipticum 439 



Spirifera camerata 269 



maid ^ 266 



pinonensis 266 



subumbona 266 



Split Rock Rivor, Minn I0r, 116, 143, 145, 177 



Spring deposit, Ideal section of a ( Fig. 49) 219 



Hill, Carboniferous fauna of 269 



Spurious and doubtful species 



Stannard's Rock, Lake Superior .113, 139, 177, 179 



, Quartzloss porphyry of 139 



Stenotheca elongate, 258 



Stevenson, J.J., cited 343 



Stratiform amygdaloids of Koweeuaw 



Series described 118 



Mrcptorhynchus chemunjensis 266 



crenutria 269 



Striation, Glacial, in Dakota 399 



, , - Finger Luke i\v !an 358 



, Grand Rivn-ivgion 342 



, , Green Bay region 318 



, , Hudson (western) region 374 



, , Lake Michigan region 325 



f , Superior region 387 



