506 



INDEX. 



Pumpelly, Raplirel, ou pseudo-amygdules. 203 



with Brooks and Rominger, map of Upper Pe- 

 ninsula of ilicliigau 18 



Pyroclastics, acid, described 94,95,135-148 



of Hemlock formation described 135-148 



plate of 140 



intruded by dolerite 147 



road material 154 



Pyroxene altering to uralite 48 



crystallization of 258, 259 



included in hornblende 237, 241, 245, 251, 260 



plate of 312 



including olivine 255, 256 



including serpentine 245 



iutergrown with hornblende 251 



of ampbibole-peridotlte 258 



of bronzite-norite-porphyry 246 



of gabbro 237,238,241,245 



of metadolerite 201 



of peridotite 250,260 



of picrite-porphyry 213, 218 



of tuffs 138 



pseudomorphs 213,214,218 



zonal intergi owtb with feldspar, plate of 322 



zonal intergro,wth with, hornblende 260 



plate of.. r 320 



zonal intergrowth witli olivine, plate of 320, 322 



Q. 

 Quartz and magnetite, oval structure in Groveland 



formation 420-423 



augen of conglomerate 475 



cataclastic structure in 41 , 44 



enlargement of 57, 85, 404, 405 



from feldspar . . 42, 52, DO, 111, 131, 151, 169, 170, 171, 201, 248 



from granite 52 



globular texture in 86 



granulation of 51, 90 



included in feldspar 40,191,394,403,468 



included in horn blende 47 



included in ilmenite 444 



including apatite 194,419,420 



including biotite 47,171,394,403,466 



including chlorite 403,419,420 



including epidote 47 



including hornblende 466 



including iron oxide 394, 419 



including muscovite 171, 394, 403 



including rutile 394,420 



^ including sericite 51 



including tourmaline 420 



inclusions in . . 41, 82, 191. 261, 388, 393, 396, 403, 404, 425, 466 



lenticules in greenstone 485, 486 



micropoikilitic zones about, plate of 270 



of acid lavas 89,91,93 



of amphibolite 296,466 



of amygdiiles 125,126 



plate of 280,284 



of basic dikes 47 



of biotite-schist 443,468,484 



of Bone Lake scbists 151 



of conglomerate 477, 478 



of diorite 225 



of dolomite 410,436 



of granite , 191,193,194,198,388,464 



plate of ' 298 



Quartz and magnetite of graywacke 56, 57, 169, 431 



of greenstone 470, 483, 486 



of Groveland formation 419, 421, 449, 450 



of Hemlock schist 444 



of marble 481 



of metabasalt 117, 118, 127, 129, 132, 133 



of metadolerite 201 



of mica-schist 393,414 



of peridotite 261 



of pbyllite 440 



of py roclastics 147 



of quartz-mica-diorite-porphyry, plate of 310 



of quartzite 52, 402, 404, 425, 450 



of rhyolite-porphyry 81, 83, 84, 85, 86 



pressure effects in, plate of 278 



of rock intermediatebetweengraniteand quartz- 



ite. 



51 



of sedimentary inclusion in granite 197 



of sericite-schist 443 



of tuff 142 



orientation of 51, 84, 118, 132, 133, 171, 402, 404, 475 



penetrated by tourmaline 57 



phenocrysts, aureoled, of rhyolite-porphyry, 



plate of 272 



pressure effects in 41 , 



51, 53, 57,81, 82, 90, 91, 93, 133, 159, 225, 

 278,388, 402, 404, 426, 464, 468, 477, 484 



plate of 268,276 



rhomboebdral parting in 82 



veins in greenstone 14 



Groveland formation 449 



in ore deposits 185 



in Eandville formation 435 



Quartz-biotite-granite 40 



Quartz-diorite 230 



Quartz-mica diorite 227, 230 



Quartz-mica-diorite-porphyry, plate of 310 



Quartz-porphyry 429 



Quartz rock 134 



of Mansfield ore deposit 63,67,69,70 



Quartz-schist of Kandville formation 52 



of Sturgeon formation 401 



of Upper Huronian 173 



Quartzite, apparent gradation Into granite 39, 51, 52 



correlation of xxv, xsvi 



current bedding in 53 



metamorpbism of 425, 426 



of Felch Mountain Range described 398-405,423-426 



of Randville formation 51-53 



of Upper Huronian xxii, 425 



pressure effects in 52 



relations to dolomite 51, 376 



relations to granite 3>76 



relations to ore deposits 182 



{See Sturgeon quartzite.) 



E. 



Railways: Chicago, Milwaukee and St. Paul 95,143,175 



Chicago and Northwestern 156,175,423 



Milwaukee and Korthern 406 



Raisin, C, on alteration of olivine 218 



on elUpaoidal structure 118 



Randville dolomite described . . xix, 27, 50-53, 406-411, 431-437 



analyses of 409, 435 



correlation of xxv, xsvi 



distribution of 26, 50, 406-408, 431, 432 



