494 



INDEX. 



Coutchiching 380 



Credner, H., on Felch Mountain range 376 



on Menominee district 377 



on origin of iron ore 71 



Cretaceous subsidence xxiv 



Cross, Whitman, on metadolerite 97 



Crystal Falls area, ore deposits of 178 



comparison with output of Menominee mines... 18& 



comparison with output of region 186 



discovery of ore deposits 175 



Crystal Falls district, drainage of 31-36 



elevations in - 30, 31, 332 



folding of 26' 



geographical limits of 25 



physiography 13, 29-37, 329-335 



relations to Marquette district 11, 25, 329 



relations to Menominee district 11,25,329 



structure and stratigraphy of 25-29 



Crystal Falls mine, analysis of ore from 181 



location of 178, op. 186 



table of shipments of op. 186 



referred to 161 



Crystal Falls aeries, correlation with Marquette 



series xxv,xxvi 



correlation with Menominee series xxv, xxvr 



metamorphism of xxiv, xxv, xxvi 



Crystal Falls syncline xxnr, 2G, 178 



described 158-161 



Crystalline schist of Bone Lake described 148-152 



of Upper Huronian 166,167,171,172 



Crystallization of minerals of basic rock described . . 257-259 

 of minerals of intrusive series 262 



Culver, G.E., referred to 22 



Current bedding in quartzite 53 



D. 



Dakyns, J. K., on plutonic rocks 222 



Dalmer, X., on ellipsoidal structure 118, 119 



Dana. J. X>., on ellipsoidal structure 120, 121, 124 



sketch by 120 



on metadolerite 96 



on origin of volcanics 78 



referred to 95 



Dartou.N. H.,on ultrabasic iutrusives 219-220 



referred to 95 



Dathe,E., on ellipsoidal structure 118, 119 



Deer River 38, 75, 88, 333 



described 31,32-35,334 



development of 32-35 



topography of valley 29 



Delphic mine, location of op. 186 



table of shipments from op. 186 



Desmosite gradation to spilosite, plate of 306 



of Mansfield formation 04 



described 207 



De Soto Mining Co. {see Mansfield mine) 65 



Devitrification of aporbyolite 87 



of nietabasalt 102,103,126 



of tutfs 138 



Dewitt, N. T.,picrite-porphyry at 219 



Diabase, alteration of 469 



altering to greenstone 466-484 



altering to iiornblende-schist 466 



intruding conglomerate 476 



intruding granite 429 



intruding Felch Mountain series 426 



Diabase intruding Sturgeon River series 



((SeeMetadiabase.) 

 Dial compass, use of 



described 



Diamond-drill work at Hemlock mine, figure of 



insec.20.T.45N.,R.33"W 



Diflferentiation of magma 



Dike, associated with ore deposits at Paint River 

 mine 



in Monitor mine 



in Paint River mine 



acid, in Archeaii , described 



basic, in Archean, described 



effect on topography, sketch of 



{See Basic dikes, Acid dikes.) 

 Diller, J. S., on ultrabasic intrusives 



referred to 



Diopside of gabbro and norite 



Diorite, comparison with granodiorite 



crystallization of minerals of 



intruded by diorite-porphyry 



Intruded by granite 



intruded by hornblende-gabbro 



of intrusive series described - 



use of term 



Diorite-porphyry intruding diorite 



intruding hornblende-gabbro 



Diorite-schist associated with ore deposits 



Diorite. See Motadiorite. 



Dip needle, use of 



described 



Doane exploration 



Dolerite, contact with gxauite 



dikes associated with ore deposits 



grading into basalt 



including sedimentary rocks 



intruded by granite 



intruding Archean 



intruding Hemlock formation 



intruding pyroclastics 



intrusive, endomorpbic effects of 



metamorphism of Mansfield slate, described 



relations to intrusives of other districts 



relations to pic rite porphyry 



use of term 



(See Metadolerite, Basic intrusives.) 

 Dolomitedescribed 408-411, 431-437, 



analyses of 



containing foreign minerals 



metamorphism of 



of Michigamme Mountain and Fence River areas, 

 described 



of Randville formation, described 



of Sturgeon River tongue, described 



distribution of " 



relations to conglomerate 



relations to Felch Mountain fragmeutals . . . 

 relations to Lake Superior sandstone 



orientation of 



(See Randville dolomite.) 



Drainage of Crystal Falls district 31-36, 



Drift. (See Pleistocene.) 



Dunn Iron Mining Company. (See Dunn Mine.) 



Dunn mine, analysis of ore from 



depth of 



description of ore bodies 



24, 344 

 341-342 



222-232 

 22, 223 



24. 344 

 342-343 

 447, 449 



479-482 

 409, 435 



431-437 

 408-411 

 479^82 



