EXPOSUKES OF THE WEWE SLATE. 257 



The Wewe slate, following above the limestone, shonld appear both to the 

 north and south of this belt. On the south, however, the formation is 

 exposed only in sees. 13 and 24, T. 47 N., R. 2G W., and in sec. 18, T. 47 N., 

 R. 2.5 W., whei-e, how^ever, it extends but a short distance before it is 

 hidden bv the Pleistocene sands. The northern arm of the slates shows 

 outcrops in sees. 11 and 12, T. 47 N., R. 2G W., and very numerous out- 

 crops west of the Kona dolomite in sees. 5, 6, 7, and 8, T. 47 X., R. 2r) W. 

 In this area the slate belt swings from an easterh' course to a northerly, 

 and finally to a westerh" one, and extends along the southern side of the 

 northern limestone for an mdcnown distance westward. There are no 

 exposures in this area, and whether it dies out before the slates and quartz- 

 ites east of Teal Lake are reached is uncertain. The black slate occurring 

 at a somewhat persistent horizon between thick beds of quartzites in sees. 

 32 and 33, T. 48 N., R. 2G W., may be the most westerly representative of 

 the northern belt. Farther west the formation was not deposited, since in 

 Wewe time the sea encroaching from the east had not overridden that ])art 

 of the district. 



The slate being a less resistant formation tlian tlit? Kona dolomite 

 below or the Ajibik quartzite above, is, in general, marked l>y valleys, and 

 consequently the exposures are few for much of the area of the belt. The 

 two exceptions to this statement are the numerous prominent exposures in 

 sees. 5, 6, 7, and 8, T. 47 N., R. 25 W., and the exposures west of Goose 

 Lake. The appearance of the first set of outcrops is due to the cutting 

 action of Carp River, which flows over the ledges in a number of rapids 

 and cascades. The man)- exposures west of Groose Lake are due to the 

 fact that here was the westward limit of the shore-line at this time, and 

 therefore the sediments deposited at this })lace were coarser and were later 

 changed to graywacke and conglomerate, and thus became more resistant. 

 Also they gain in prominence by the presence of several resistant Archean 

 islands, which they surround. 



FOLDING. 



The broad belt of slate running north and east from Goose Lake, then 

 .swinging to the north and west, has no especially interesting folds, as the 

 .slate everywhere dips awav from the Kona dolomite below, and thus 



MON XXVIII 17 



