INDEX. 



507 



Page. 



Kamlville dolmite, folding of 432-434 



of Felch, Mountain tongue described 406-411 



of llichigamme Mountain and Fence River areas 



described 431-437 



pressure effects in 435, 437 



quartzite of 51-53 



relations to Archean xix, 51,53, 55, 407 



relations to Groveland formation xx 



relations to Hemlock formation xx, 75 



relations to intrusives 434 



relations to Mansfield formation xx, 55, 41 1, 438 



relations to mica-scbists 392 



relations to Sturgeon quartzite.. xix, 51,407, 430,4:11,434 



relations to Upper Huroniau 424 



relations to underlying formations 53 



tbickness of xvii, xix, 26, 53, 407, 408, 433 



topograpby of 50, 406-408 



Randrille station 406 



Range. [See Town.) 



Ransome, F. L.. on ellipsoidal basalt . 113, 114,118, 119, 122, 123 



on feldspar sheaves 99 



on ultrabasic intrusives 220 



on variolites 108 



Recom posed granite grading into quartzite 39 



of Marquette district 52 



Recryatallization of gneisses 390, 391 



of gray wacke 195, 198 



plate of 298 



of hornblende, plate of 316 



OfE 



171 



80, 190 



81-87 



86,87 

 83-86 



of quartz 404 



of Sturgeon river conglomerate xsiv 



Reibungsbreccia of Hemlock formation 136 



of Upper Huronian 161,166,177 



Republic (town) 333, 334 



Republic trough 26,452,453 



Resorption rim about olivine 258 



Reyar, E., referred to 142 



Rhombohedral parting in quartz 82 



Rbyolite-porphyry . . . : 



described 



banding of 



plate of 



microgranitic texture in described 



micropoikilitic texture in described 



plate of 270,272 



of Hemlock formation 80 



described 81-87 



phenocrysts of, plate of 268 



pressure effects in, plate of 276, 278 



Richardson, G. B., analysis by 408, 409 



Ridgway, J. L., indebtedness to 13, xvr 



Rieserferner, tonalite from 230, 231 



Ripple marks in arkose 473 



Road material of Hemlock formation 154 



Roberts, C. T. , indebtedness to 66, 182 



Romberg, J ., on augite of gabbro 255 



on olivine-gabbro 256 



on pyroxene zone about olivine 256 



Rominger, C, on correlation of Menominee rocks ... 19 



on correlation of dolerite dikes 189 



on correlation of Upper Huronian 164 



on Felch Mountain range 374,379,381 



on Menominee district 19 



on iron-bearing formation near Crystal Falls 179,180 



on j)rogre3sive metamorphism 52 



Kominger, C.,OD Sturgeon River tongue 461 



on Upper Peninsula of Michigan 20 



referred to xv 



with Brooks and Pumpelly, map of Upper Penin- 

 sula of Michigan 18 



Rosenbusch, H., analysis by 166 



on enstatite-porphyrite 247 



on peridoti te 249 



on picrite-porpbyry 220,221 



on spilosite 206 



referred to 193,105 



Roth, J., on transfer of material from basic intru- 

 sives to slate 211 



on weathering of granite 58 



Rothpletz, A.,on ellipsoidal structure 118.119 



Rutile from biotite 43, 192, 202, 225 



from ilraenite 202, 239 



from titanic iron 170, 192, 193, 239 



included in bronzite 238 



included in feldspar 234 



included in hornblende 236, 239, 248 



included in pinnite 410 



included in quartz 394,420 



of acid lavas 93 



of biotite-granite 192, 193 



of hiotite-schist 484 



of Bone Lake schist 151 



of gabbro 236, 239 



of gray wacke 56, 170 



of metabasalt 129 



of raetadolerite 202 



of metamorphosed Mansfield slate 205 



twinning of 205, 236 



S. 



Saalband in quartz-mica diorite 228 



Sagenite from biotite - 192, 193 



included in biotite 403 



included in chlorite 403 



of biotite-granite 192, 193 



Sand, volcanic, plate of 296 



Sandstone and slates of Sturgeon River dolomite 



formation described 481,482 



Sandstone, Lake Superior. (See Potsdam sandstone.) 



Sanford, S., indebtedness to 331 



Santorin, basalt from 1200 



Sohafer, R. W., on basic rocks 247 



Schistose acid lavas described 87-94 



dikes in Archean 46-48 



pyroclastics described 145-148 



Schistosity of acid lavas 91 



of basic dikes 47,48^ 



of gabbro 248 



plate of 316 



of granite 44,194 



of greenstone 470 



of hornblende-gneiss 175 



of hornblende-schist 465 



of metabasalt 127 



of mica-schist 114 



of pyroclastics 147 



of Sturgeon River conglomerate 474,475 



Schists. {See Crystalline schists.) 



Schlieren in metabasalt 98 



ScorifB of Hemlock: formation 76 



Section. {See Town.) 



