INDEX. 



493 



Page. 

 Cambrian sandstone, relations to Upper Huronian xxiv, 



. 161, 162 



155.: 



Carbon of Mansfield slate 



Carbonate developed by dynamic action 



Carbonation of metabasalt 117, 130, 132, 



Carboniferous clays, analyses of 



Cataclastic structure in feldspar 



in granite 



in quartz 



Cellular texture in hornblende 



Channing, J. Park, figure by 



on Mansfield mine 



referred to 



Channing (town) 



Chert fragments in conglomerate 



of Mansfield formation described 



of Upper Huronian 



pressure effects in 



relations to ore deposits 



road material 



Cherty carbonate from organic matter 



in conglomerate 



Chester, F.D., (?) on gabbros 



Chicago, Milwaukee, and St. Paul Railway 95, 



Chicago and Northwestern Railway 156, 



Chlorite altering to epidote 



banding with biotite 



calcification of 



from biotite 43, 47, 192, 193, 215, 216, 225, 248, 



from feldspar 82,99,111, 



from hornblende 100, 203, 214, 



included in quartz 403, 



including epidote 



including ilmenite 



including iron ore 



including sagenite 



including titanite 



of adinole 



of altered slate 



of amygdules 



plate of 



of arltose 



of basic dikes 



of biotite-granite 



of biotite-schist 



of Bone Lake schist 



of dolomite 



of graywacke 



of metabasalt 



101, 117, 118, 127, 128, 129, 131, 132, 



of mica-schist 



of phyllite 



of picrite-porphyry 213, 



of pyroclastics 



of spilosite 



plate of 



of spilosite-desmosite, plate of 



of slate 



of tuff 



of volcanic conglomerate 143, 



orientation of 118, 127, 



pseudomorphs after biotite 



after garnet 



replaced by calcite 



Chlorite-schist from basic volcanics 



from graywacke 



143, 175 

 175, 423 



225 

 132 

 403, 425 

 131, 201 

 215, 237 

 419, 420 

 248 

 146, 216 



124, 125 

 280, 284 



98, 99, 

 133, 134 



302, 304 



306 



205, 209 



141, 142 



144. 145 



133. 146 

 217, 228 



403 

 132 



Page. 

 Chlorite-schiat intrusive in ^.Igonkian of Sturgeon 



River 482 



of Hemlock formation 442 



of Upper Huronian 166,174 



Cbloritization of metabasalt 117 



Chrustachoff, C. von, on relations of pyroxene and 



amphibole 258 



Claire mine, location of 178, op. 186 



table of shipments from op. 186 



Claire Mining Company. {See Claire mine.) 



Clarke, F.W., analysis by 61 



Clarksburg volcanics 132,165 



comparison with banded greenstones of Sturgeon 



River tongue ^. ... 487 



replacing Michigamme and Ishpeming forma- 

 tions „ XXVI 



Clastic volcanic, plate of 284 



Clay slates, analyses of 59,61 



analyses of, compared with altered clay slates . . 209, 211 



composition of 58, 60 



from granite 58 



of Mansfield formation described 57-62 



origin of 58 



relations to ferruginous chert 63 



relations to ore bodies 63 



relations to siderite-slate 63 



Cleavage of acid lavas 88-89 



ofaugite 250 



of biotite-schist 467 



of Hemlock schist 443, 445 



of hornblende 251 



of phyllite 439,440 



of pyroxene 237 



Clements, J. Morgan, ou ellipsoidal structure, 



referred to 118 



on Hemlock volcanics 446 



on Sturgeon River sandstone 481 



on volcanics of Crystal Palls district 20 



referred to xxvi, 437, 447 



Cole, G. A. J., on ellipsoidal structure 118, 119 



Columbia mine, description of ore bodies 182 



location of 179, op. 186 



table of shipments from op. 186 



referred to 161 



Commonwealth 385 



iron ores at xxvi 



Compass, dial, use of 24,341,342,344 



Concentration of ore in synclinal troughs (sec Iron 



ore deposits, origin of ) 183, 184 



Conglomerate altering to sericite-schist 475 



basalt of Upper Huronian 163 



of Hemlock formation 76, 152,153 



intruded by diabase 476 



of Mansfield ore deposit 63-64,68 



intruded by greenstone 475-47G 



of Sturgeon River xviii, xxiv, 461,462, 481 



described 472-479 



of Upper Huronian xxir, 166 



pressure effects in 474, xviii 



volcanic, described 143-145 



plate of 284 



use of term 136 



Copper, absence of, in Huronian volcanics 1 25 



Corrigan, McKinney & Co. {See Crystal Falls mine.) 

 Cortlandt series, comparison with Crystal Falls in- 



trusives 222 



