608 



INDEX. 



Page. 



Veins of sericite-acliist 209-21iJ 



of sideritB 187 



of slate in Northern Complex 186. 187 



Telaui, referred to 177 



Vermilion rock 118 



Vesuvius 481 



Volcanoes, of Hawaii 142. 463, 464, 467, 481 



submarine 463, 464 



Volcanic rocks. ... 3, 141, 142, 171. 408, 435, 460, 481, 564-565, 574 



ashes 58 



bombs 169, 479, 481 



breccias (see Breccias in Clarksburg series), 

 conglomerates (see Conglomerates of Clarksburg 

 series) . 



erujtti ves 481, 485 



tufls 562 



Volcanic plugs 484 



Volcanic vents 460, 461, 463, 466, 479. 481 , 484, 485 



Volunteer mine 138, 284, 312, 333, 360, 396, 399, 412, 429. 431 



Van Hise, C. R., on Algonkian system 127, 135 



on correlation of Huronian areas of Lake Supe- 

 rior region 126 



on general geology of Marquette district 125 - 



127, 130-133, 133-135, 141-142, 143-144, 554-579 



on Ishpeming formation 409-439 



ou Lower Marquette series , 221-405 



onMichigamme formation 439-460 



on origin ofiruuores 131-133 



on pre-Cambrian rocks in Lake Superior region. 129, 130 

 on significance of conglomerates above ore hori- 

 zon 125-127 



on succession in Marquette district 133- 



134, 141-142, 143-144 



on two series in Huronian 126 



referred to 2, 4, 7, 227, 230, 237, 242, 268, 274, 317, 395, 



400, 449, 457, 531, 540, 568, 570, 571, 575, 577 

 (A'ee Irving, R.D.) 



W. 



"Wabaasin Lake. (See Lake Wabasain.) 



"Wads worth, M. E., ou general geology of Marquette 



district 71-79, 127-128, J 36-140 



on microscopic features of jaspilites 73 



on origin of basic rocks 74 



ou origin of jaspilites iu iron ores 73- 



78, 79-81, 119, 127-128, 135-136, 137-140 

 on relations of granites and sedimentary rocks. . 75-76 



on relations of green schist and j aspilite 72-73 



ou serpentine 76-77, 99-100, 183, 185 



on subdivision of Azoic system 118-120, 135-137 



on succession in Marquette district 135-140 



referred to 1, 6. 7, 103. 106. 111. 115. 126, 125, 127. 



140. 144, 183, 185, 298, 311, 497, 543 

 (SeeJ.D. Whitney.) 



"Washington mine 74 



"Weathering of basic d iko rocks 181 



of greenstones 498 



of Kitchi schists 164 



of Mona schists 156 



(See Denudation, Erosion.) 



"Wehrlito 183,185 



"Werveke, referred to 177 



"West Ilepublic mine 541 , 542 



"Western tongue 283, 286, 293, 313, 390, 439, 444, 445, 570 



"Wetmoremine 127 



Wewe hills 256,259,275,308 



Wewe slate 221, 244, 248. 251, 252 



284, 285. 287, 289, 290. 292. 300, 304, 306, 307, 554, 556 



Wewe slate, deposition of 560 



described 256, 282 



plate of 262,280 



relations to Ajibik quartzite 271 



272, 273, 277, 286, 287, 294-295, 307, 309, 310 



relations to Archean 270, 276, 277, 280 



relations to Kona dolomite 269, 273, 274 



Wichmann, A 67, 70 



"Wheat mine 125 



(See Starwest mine.) 



"White Mountain series 66 



"Whitney, J. D., analyses by 184 



ou geology of Marquette district 24 



on origin and occurrence of Iron ores 34-37 



on presence of two series in Lake Superior region 38 



referred to 6, 16, 17, 38, 39. 40 



42, 46, 47, 48, 56, 60, 61, 64, 71, 72, 76, 79, 99, 113, 125 

 with M. E. Wadsworth, on divisibility of Azoic 



system 99 



on origin of ores, jaspilites, and diorites 99 



(See Foster.) 

 "Whittlesey, Charles, on Laurentian series in Midi- 



igan •-.. G2-63 



on origin of Azoic rocks 38-39 



on origin of iron ores 39 



referred to 6, 71 



Wichmann, A., ou microscopic features of Mar- 

 quette rocks 67, .70 



referred to 6,64,66,*r4 



"Wilkins, "William, referred to 12 



"Williams. G. H., criticism of work of, by N. H. "Win- 



chell 145-146 



ou microscopical description of greenstone- 

 schists 123-125 



on origin of greenstone-schists 114, 123-125 



referred to 7, 122, 130, 145, 154, 155, 156, 157, 



159, 160, 178, 183, 206, 476, 502 

 Wlnchell, Alex., on age of Marquette iron-bearing 



rocks 117-118 



on general geology of Marquette district 39, 48 



on points in geology of Marquette district 117-118 



referred to 6, 7, 39, 71, 81, 121, 125 



Winchell, H. V., sketch of discovery of mineral de- 

 posits iu Lake Superior region 142 



Winchell, N. H., on conglomerates and their signifi- 

 cance 115,142 



on origin of Archean greenstones 145, 146 



on points in the geology of the Marquette dis- 

 trict 115-116.142 



referred to 7,117,121,125,489 



Wiathrop mine 54, 125, 137 



(See Lowthian mine.) 



"Wisconsin 5, 6, 10, 35, 37, 61, 64, 69 



Wright, C. E., on geology of Upper Peninsula of 



Michigan ..'. 66-67 



on 7iiicroscopical features of Marquette rocks ... 59 



referred to 6,57.64,71,72,77,119 



Zirkel, F.. referred to 66, 177, 201 



Zoisite of mica-gneiss 416, 450 



of mica-schist 4 6 



of quartz-schist 416,443 



Zoue of fracture and flowage .... 251, 268, 280, 344, 350, 356. 571 



of flowage 269 



of fracture 269 



