212 THK ^FAUQUETTE IROy-BEAEING DISTRICT. 



beneath the cong-hiiuerates lyin.^- at the base (it'tlie ]\Iar(juette series. (See 

 Atlas Sheet XXXV.) On the west side of the hirg-e hill iu the NW. ^ 

 sec. 3') the relations of the two rocks are plain. Here the foliation of the 

 schist (No. 20654) strikes directl}- into a heavily bedded quartzite which 

 a little farther to the north becomes conglomeratic. In the NE. ^ sec. 34 

 the actual contacts between the gneisses and the conglomerates are not 

 seen, but the two rocks are very near each other, and the conglomerates 

 are filled with large bowlders of the schists. The little hill nearest the 

 northwest corner of sec. 3.") is composed of gneiss, which is cut tlu'ough 

 and through l)v so many dikes and veins that it seems to be saturated 

 with granitic material. In this vicinity the indications point clearly to the 

 fact that the gneisses are older than the oldest of the x\lgonkian rocks in 

 their neighborhood. 



In the little hill south of the Piatt mine, in sec. 32, T. 47 X., E. 26 W., 

 the relations of the rocks are apparently different. (See Atlas Sheet XXXII.) 

 On the north side of the hill, near the top, is a large, bare ledge of a yellow 

 schist, Avhich, in the hand specimen and under the microscope, has the usual 

 appearance of the Palmer gneisses. The west end of the ledge, however, 

 is conglomeratic, and the matrix of the great conglomerate ledge on the 

 west end of the same hill is identical Avith the material of the yellow schist. 

 At this place the gneiss was originally a fragmental rock. A few hundred 

 yards southwest of the Piatt mine the conglomerate at the base of the 

 iron-bearing formation is Avell exposed in a number of large, bare ledges, 

 and in it may be seen hunrbeds of large bowlders of the Palmer gneisses. 

 Evidently Ave have in this area two entirely different rocks with the char- 

 acteristics belonging to the Palmer gneisses. One is a mashed fragmental 

 rock at the base of the iron-bearing formation, Avhile the other is much older 

 than tliis, and is presumably a mashed form of the granites. 



A third area of the Palmer gneisses deserves mention for the complica- 

 tion of relations it presents. Just south of Summit ^Mountain, in the Avestern 

 half of sec. 25, and through the center of sec. '26, T. 47 N., R. 27 W., is a belt 

 of schists of varying Avidth. (See Atlas Sheet XXIX.) It comprises well- 

 banded, sometimes fine-grained, sometimes coarse-grained, foliated rocks of 

 a light-gray or dark-gray color. The rude bedding Avhicli produces the band- 

 ing dips about 50° northeast and strikes about 30° south of east. In some 



