THE LOWER HURONIAN. 323 



distribution of the rocks. The conglomerate occurs both north and south 

 of the greenstone, but on the east side of the island near the top of the hill 

 there is a small area of slate and conglomerate wliich is clearl}^ a part of 

 the Ogishke conglomerate that was infolded in the underlying greenstone 

 and has not been completely removed by erosion. 



When this greenstone finticline which occurs at the southwest end 

 of Ogishke Muncie Lake and also on the island just described is followed 

 eastward along the south side of the lake, it is found to disappear for a 

 distance of about one-third of a mile, it having plunged down under the 

 conglomerate, which has not been eroded deep enough to show the 

 greenstone. It reappears again near the north-south section line between 

 sees. 27 and '26, T. 65 N., R. 6 W. Here the conglomerate is found 

 in contact with the greenstone on the north slope, and extends north of 

 the greenstone over a considerable area to the lake shore. South of the 

 greenstone, however, no conglomerate was found. Near the west end of 

 this anticline the slates seem to come in almost immediately. The actual 

 contact between the two was wanting, and a thin conglomerate may 

 occur in the depression between the two. This same greenstone anticline 

 continues eastward and comes out again on the west side of the bay of 

 Ogishke Muncie, into which empties the stream which comes from Fox, 

 Agamok, and Gobbemichigamma lakes. Conglomerate is here again 

 exposed all along the north side of the anticline, whereas on the south 

 side the slates come up very nearly in conta,ct with the greenstone. This 

 southern edge of the greenstone was here followed for a considerable 

 distance, in search of an actual contact between the greenstone and sedi- 

 ments, and at one place, just before the greenstone exposures . cease and 

 where a swamjjy area begins, a small patch of conglomerate was found 

 hanging on the south face of the greenstone. The conglomerate here must 

 be very thin, as the slates begin again a few feet south of the face of 

 the greenstone ledge. If the map (atlas, PL XVI) is referred to it will 

 be noted that south of these small greenstone anticlines bordering the 

 south shore of Ogishke Muncie Lake there occurs a broad area of the 

 Knife Lake slates which continue south to the great Twin Peaks green- 

 stone anticline. The presence of this great breadth of slates between these 

 anticlines, and the fact that wliere they are in contact with the greenstone 

 there is but a very thin mass of conglomerate, indicate that during Lower 



