INTEltESTlNG LOCALITIES OF THE WEWE SLATE. 277 



the imderlviuf)- rork. This roniiloiiierate is iuterhiiuinatLMl witli feri-u;^inous 

 slate and graywacke. Here, as at the first locality, it is difficult to deter- 

 mine certainly the exact point at Avliich the reconiposed rock ends and the 

 schistose granite begins. 



As has been explained aliove, this area is a northeastward-dipping 

 isoclinal fold. These conglomerates and slates therefore appear to dip nnder 

 the gneissoid granite on the southwest side of the area, and to dip away 

 from it on the nortlieast side. Superim2)Osed upon tlie major fold are 

 minor corrugations. As a consequence of this, just south of the (piarter 

 line of sec. 23 a tongue of quartzite projects into the granite area to the 

 southeast, so that a section here passes from the Wewe slate to tlie granite, 

 then to the Wewe slate, then to the granite, and iinally to the Wewe 

 slate. 



These folds are cross folded, and consequently pitch either to the south- 

 east or to the northwest, and the gneissoid granite plunges under the slate, 

 and is thus an isolated area. The intense mashing has produced in the 

 ori"-inal granite, as has been said, a strongly marked schistose structure, so 

 that the original wdiite granite has been transformed to a rock which resem- 

 bles a quartz-schist. In a similar way the detrital rocks have been subjected 

 to mashing, Avith a consequent development of a crystalline structure, so 

 that it Avould not be surprising if the whole were regarded as a conforma- 

 ble series, dipping to the northeast. However, in working along tlie contact 

 carefullv, the conglomerates and the occasional localities in which the 

 demarcation between the Wewe formation and the Archean is clear .show 

 that the slate is later than, and is composed of, the broken granitic material. 



The Wewe slates, both to the northeast and to the southwest of the 

 Archean area, grade upward by interlaminations into the Ajibik quartzite, 

 just as east of Goose Lake. Here, as there, the placing of the l)oundary 

 line between the two formations is somewhat arbitrary, the rock being- 

 regarded as belonging to the slate where the slaty phases are predominant. 

 This passage of the slate into the quartzite on the southwestern part of the- 

 bluff, because of the overturning of the strata, occurs in going from appar- 

 ently higher to lower members. The iqDper phases of the Wewe slate are. 

 peculiar iron-stained novaculites. 



