INTERESTING LOCALITIES OF AJIBIK QIJARTZITE. 305 



preceding, Imt the whole constitutes such a continuous series of exposures 

 that it has been thought best to describe them together. 



As west of Teal Lake, wherever the lowest member of the formation 

 is exposed it is a conglomerate. The pebbles of this conglomerate are 

 mainly of white (piartz, but with these are some of jasper. One contact is 

 found a short distance west of the road through the quartzite range running 

 north from Negaunee, at about 1,425 to 1,450 steps N. and 450 to 500 

 steps W. of the SE. corner of sec. 31. At two places the conglomerate 

 was seen in direct contact with the green schist of the Kitchi formation. 

 The schistosity of the schist is here very nearly ])arallel to the bedding of 

 the quartzite, and there is no apparent unconformity. At tlie Carp River 

 section the lower slaty members of the formation have been so strongly 

 mashed as to resemble the green schist below. However, there always 

 seems to be a difference. The schists have great uniformity in ajipearance, 

 their lamina?, being of the same character, while the slates are composed of 

 alternating layers of different characters. Further, the schists break about 

 equally Avell throughout an entire zone, parting as though they were a 

 mass of parallel fibers, rather than like leaves, as do the slates. Also 

 east of the Carp River the lower parts of the slate are distinctly conglom- 

 eratic. Notwithstanding these differences, at one place it is exceedingly 

 difficult in the field to say exactly where the schists end and the slates 

 begin. However, when it is considered that along this same horizon, both 

 at the State road conglomerate to the east and south of the Kitchi Hills to 

 the west, there is the clearest sort of structural break, it can not be douljted 

 that the same is true for this area. As is so frequently the case, the major 

 accommodation took place along the contact plane. The fragmental rock 

 and the Kitchi formation were so mashed that a parallel schistosity was 

 produced in them. Fortiinately, while the matrix has become crystalline in 

 the sedimentary rocks, the white quartz pebbles were sufficiently resistant 

 to show their fragmental character. 



In a section at the widest part of the ridge, in passing to higher hori- 

 zons the conglomerate usually varies quickly into a mica-slate, and this 

 passes into the typical quartzites of the formation. South of this quartzite 

 MON xxviii 20 



