272 THE MARQUETTE IROX BEARING DISTRICT. 



the formation is not more than a third of the above estimate. In the east 

 2)art of sees. 13 and 24 (Athxs Sheets XXXIV, XXXV), where there are 

 numerous rolls of the slate and quartzite, a close examination showed that 

 there is probably exposed a thickness of .slates not exceeding- 100 feet. At 

 the numerous exposures in sees. 5, 6, 7, and 8, T. 47 N., R. 25 W. (Atlas 

 Sheet XXXVII), there is little opportunity for an accurate estimate of the 

 thickness. The calculated thickness west of Goose Lake is probably a 

 maximum, and that east of Goose Lake may be considered a minimum. 

 The averag-e thickness of the formation ma}" perhaps be as much as 500 feet. 



INTERESTING LOCALITIES. 



Makwa Hills. — Beo'innino' at the north and Avest, the first locality in which 

 the Wewe slate may be present is in the quartzite range north and east of 

 Teal Lake (Atlas Sheet XXX). In the center of the quartzite formation 

 is a belt of slate, Avliich is probably equivalent to some jiart of the Wewe 

 slate to the east, but with what part it should be equated it is impossible 

 to say. In passing from this place toward the east there are no exposures 

 for several miles. The belt is, however, supposed to persist, but to lack 

 exposure because of its feeble resistance. 



Eastern area. — At tlio castem eud of tlic great westward-plunging syncline 

 occur numerous outcrops of this formation (Atlas Sheets XXXVI and 

 XXXVII). The exposures here are for the most part found along the 

 small streams and on the Carp River, the cutting action having been suffi- 

 cient to remove the overlying drift. The rocks have a slaty cleavage, but the 

 bedding- is usually determinable. In tlie southeast part of sec. 31 the rocks 

 strike east and west and dip south. In the east part of sec. 5 the strikes are 

 mostly north and south, and in sec. 6 they are again approximately east 

 and west, thus following the folding. In the SE ^ sec. 6, along and near 

 the Carp River, are the best exposures. The slate south of the river is here 

 overlain, with a slight discordance, by the Ajibik quartzite. The character 

 of this break will be discussed later in connection with that formation. 

 Lithologicallv the slates vary from very fine grained argillaceous rocks to 

 coarse grajnvackes. In color the nonferruginous phases grade from gray 



