NDEX. 



Acid bosses in Northern Complex 151 



Acid (likt's in Basenieut Comples 150 



in ^\)^t hern Complex 151, 159, 182-183 



J cid interstices in quartz-diabase 519-520 



Acid mona schists 159-160 



Acid schists 153 



in Basement Complex 150,159-160 



in Northern Complex 159-160, 162, 167 



orisin of 160 



structure of 159 



Acid sheets 160 



Acid tuffs 160.169 



Acid veins in Basement Complex 150 



Actinolite-magnetite-schist in Lower Marquette 



series 130 



(See Griinerite-magnetite-schist.) 



Actinoliteof Clarksburg greenstone 466,472 



of hornblende-schist 476 



of gray wacke 448 



of siderite-slate 367 



of slate 448 



Actinolite-schist 91,92,500 



origin of 102 



passing into quartzite 74 



(See Ampbibole-achist, Grunerite-achist.) 

 Adams, F. D., on origin of the mica-schists of the 



Grenville series 2(il 



referred to 149,100,201 



Agglomerate at Deer lake 125 



in Northern Complex 555 



(See Greenstone-conglomerate.) 



Agnotozoic 123, 134 



proposal of name 112 



A.iibik Creek 283 



AjibikHiUs 282,283,308,310 



AJibik quartzite 221,244, 



251,252,257,259,267,271, 273, 275, 314, 315, 316, 317, 332, 334, 

 366, 382, 383, 384, 387, 388, 392, 422, 529, 534, 554, 556, 561, 562, 569 



and Archean, apparent gradation between 296-297, 



298, 305 



deposition of 560 



described 282-313,528-529 



gradation into Negaunee formation 390 



relation to Archean 295, 



296, 297, 298, 300, 301, 302, 309, 310, 313 



relations to Goodrich quartzite 310,409,411 



relations to Kitchi schists 302-303, 305 



relations to Negaunee formation 289, 



292, 293, 298, 299, 386 



Ajibik qnartzite relations to Palmer gneiss 311 



relations to Siamo slat o 289, 300, 321, 333, 334 



relations to "Wewe slate 271, 



272, 277. 286, 287, 294, 295. 307, 309, 310 

 unconformably upon Kitchi schists, figure of. . . 296 



Albito of gneissoid granite 211 



of greenstone 501 



of Monaschists 155,157 



Algonkian 129, 134, 143, 146, 154, 240, 460, 567, 569 



definition of term 127, 135 



first use of term 123 



Algonkian series... 3, 161, 170 



of Marquette district, correlated with Lower 



and Upper Huroniau of other districts 3 



of Marquette district, correlated with Original 



Hurouian of Canada 3 



of Marquette district, formations of 3 



separation from Basement Complex. . 149, 150, 154, 161, 162 



Algonkian rocks 444, 525 



Alteration in deep-seated zone 365,367, 369 



in zone of weathering 365 



of arid dike rock 182 



of amphibole 388 



of basic eruptive rock 157 



of chorty siderite 337,401^03 



of Clarksburg formation 464, 471, 473, 475, 485 



of dike diabase 179, 180-181, 511 



of epidiorite 496 



of fL-ldspar 225, 226, 



264, 265. 266, 278, 289, 290, 302. 318, 319. 327-328, 381, 

 422, 435, 438, 442, 448, 449, 450, 453, 458, 527, 529, 534 



of feldspathic biotitc-schist 197-198 



of feldspathic debris 230 



of ft-rruginous schist 75 



of ferruginous slate 380 



of garnet- 62,421,503 



of gneissoid granite 220 



of greenstone 98.396,399 



of griinerite 423.436 



of griinerite-slate 380 



of magnetite 387, 426 



of Michigamme jasper 576 



of mosaic in gneissoid granite 214 



of orthoclase 173.197,198,210 



of peridotite 183,185-186 



of plagioclase 196. 210, 496, 501-502 



of porphyrite 521 



of quartzose sandstone 230 



of rocks of Marquette district 71 



581 



