360 THE VERMILION IRON-BEARING DISTRICT. 



sec. 31, T. 63 N., R. 10 W., and in sec. 36, T. 63 N., R. 11 W. In fact, at a 

 great number of places in this area a traverse almost anywhere will show it. 

 The granite dikes occasionally occur near the river, but become more and 

 more numerous as one proceeds southward and approaches the contact of 

 the main mass of granite. For the most part the sedimentary character of 

 the rocks can not be readily recognized, as they have already been 

 metamorphosed into hornblende- and mica-schists. At one place on the 

 portage leading southeastward to Clearwater Lake, proof of the sedi- 

 mentary character of these rocks may be seen. They are well-banded 

 amphibole- and mica-schists, but a few bands having a distinctly conglom- 

 eratic nature were obser^^ed, although even these fine-grained conglomer- 

 ates are now schistose and carry a good deal of mica, evidently of 

 secondary origin. Farther south the granite dikes become more numerous 

 and the metamorphism more extreme, so that pi'actically the banding' and 

 the connection with the rocks showing unquestioned clastic characters are 

 the only indications of the sedimentary nature of these rocks. 



The intrusive relations which the Griants Range granite bears to the 

 Ely greenstone are shown at a great number of places in that portion of 

 the Vermilion district adjacent to the area underlain by the Giants Range 

 granite. It is hardly necessary to enumerate the places at which offshoots 

 from this granite penetrate the adjacent greenstone, as they may be found 

 at almost any place in the portion of the area outlined in which large 

 exposures exist. Numerous dikes of the Giants Range granite have been 

 found in nearly every place where its contact has been followed. Many of 

 them are indicated upon the accompanying map (PI. II), but it has been 

 found impossible to show all of those which have been found. Numbers of 

 them were seen in sees. 24, 27, and 28, T. 62 N., R. 13 W. Many others 

 occur in sees. 7, 8, 17, 18, and 19, T. 62 N., R. 12 W., and they are especially 

 easy to find on the bare hills southeast of Ely, in sees. 1, 2, and 3, T. 62 

 N., R. 12 W. A number of such dikes cut the hills south of Pickerel Lake, 

 along the line between sec. 25, T. 63 N., R. 11 W., and sec. 30, T. 63 N., 

 R. 10 W. The bold hills on the north shore of the Kawishiwi, in sees. 

 20, 28, and 29, show a number of these dikes penetrating the greenstones. 

 Others, in considerable number, may be found on the hills north of Stone 

 Lake, in sees. 16, 17, 20, and 21, T. 63 N., R. 10 W. A number of others 

 likewise occur in sees. 10, 14, and 15, T. 63 N., R. 10 W., and at a number 

 of places which it is not necessary to enumerate. Throughout this part of 



