596 



IIv^DEX. 



Page. 



Lesley, J. P., on occurrence of iron ores 38 



Loncoxeneof biotito-granite 172 



of epidiorite 180,181 



of g^reeustone of Eastern fenobs 493 



of hornblende-syenito 1T7 



of Monascbista ir.5, 157,159 



Lberzolite 99 100,183 



Ligbt-House Point GO, UG, 187,518 



Limestone 134,242,254,559,500,577 



at Lake Superior mine 109 



of Menominee district 576 



origin of 103-104 



siliceous *^" 



{See Kona dolomite, Marble, Dolomite.) 



Limonite from magnetite 368 



of brecciated cbert 246 



of brecciated dolomite 250 



of ferruginous chert 3G1 



of ferruginous slate 344, 361, 369, 380 



of ferruginous rock 451 



of griinerite-magnetite-schist 342 



of iron ore 375,447,454 



of mica-gneiss 450 



of shattered slate 262 



of slate 266,452 



pseudomorpbs after siderite 340, 367 



Limonitic hematite 375 



Little Presque Isle 9,30 



Locke, J., on geology of the mineral lands in Michi- 

 gan 14-15,22,23 



referred to 6.15,16,21,72 



Logan, Sir "WiUiani. referred to 105,110,146 



Lessen, referred to 157 



Lower Felcb Mountain series 575 



Lower Huronian series 66, 130, 143 



characterization of 135 



contact with Basement complex 143 



(See Lower Marquette series.) 



Lower iron-bearing series 109-110 



{See Negaunee formation.) 



Lower Marquette series 136, 152, 507, 527, 541, 554 



and Arehean, apparent gradation between 559 



area of 3 



constitution of 141 , 145 



contact with Upper Marquette 546 



correlated with Lower Felch Mountain 574 



correlated with Lower Huronian 577 



correlated with Lower Menominee 574 



denudation of 311, 312, 387, 440, 531, 537, 564 



described 3, 221-407, 528-535, 556-557 



formations of 221,554 



proposal of name 127 



relations to Arehean 298, 532-535, 557 



relations to Goodrich quartzite 536 



relations to Upper Marquette 562-563 



of Republic trough, described 528-535 



summarized 576-577 



{See Lower Huronian.) 



Lower Menominee series 575 



summarized 576-577 



Lower Silurian 55 



Lowtbianmine 360,383,430,431,571 



(See "Winthrop mine.) 

 Lucy mine 148 



M. 

 Madison, Wis 141 



Magnesian rock at Presque Isle 60 



Page. 



Magnesian schist 49, 487 



Magnetic mine 53,54, 



338, 389, 390, 391, 439, 441, 444, 503, 513, 534. 537 



Magnetic ore 109, 133, 415, 420, 434, 436, 440 



{See Magnetite ore.) 



Magnetic siliceous schist 74 



Magnetic survey 407 



Magnetite 81, 294 



alteration of 288,387,426 



and hematite, relations to jasper, quartzite, and 



soaprock, plate of 546 



from feldspar 381 



from hematite 405 



from siderite 419, 422-423, 455 



in veins 310 



included !n garnet. 387 



included in quartz 388, 389, 426 



of brecciated chert 246 



of cbert and jasper conglomerate 414 



of cherty siderite-slate 367 



of Clarksburg tuffs 475 



of conglomerate ,. 420, 431 



of diabase-porphy rite, figure of 180 



of ferruginous cbert 361 



of ferrnsinous chert-breccia 370 



of graywacke 265 



of hematite-schist 432 



of grunerite-magnetite-schist 342, 387, 390, 391 



of iron ore 426, 435, 547, 574 



described 364^365 



of iron-bearing formation 293-294. 382, 530, 576 



of jasper 293, 356, 358, 362, 372, 373, 376, 387, 428 



described 388 



of mica-schist 443 



of porpbyrite 522 



of quartzite 313, 413. 421, 437, 438. 529 



of recomposed ore 438. 439 



of schist-conglomerate 442 



of siderite slate 367 



of slate 266,317,318.320 



of slate ore 432 



projecting into quartz 389, 414, 426, 429 



replacing cblorite-schist 140 



titaniferous 475 



Magnetite ore 377, 549 



described 374 



{Sec Magnetic ore.) 



Magnetite-actinolite-schist 577 



(See Magnetite-griinerite-schist.) 



Magnetite-grlinerite-rock 375 



Magnetite-griinerite-schist 375, 531 



relations to Siamo slate 369 



(See Giirnerite-magnetite-schist.) 



Magnetite-griinerite-siderite-slate 367 



Magnetitic cbert from Micbigamme mine, plate of. . 352 



Magnetitic schist 422 



Makwa bills 272,304 



Malcliite in Northern Complex 182-183 



Manganite at Lucy mine 148 



Manganese in iron ore 68-69 



Manganese ore in hematite mines 365 



Maps 492,508 



by Bayley 508 



with Van Hiae, accompanying atlas. 



by Brooks 57 



reproduction by Putnam referred to 110 



