INTERESTING LOCALITIES OF THE WEWE SLATE. 275 



particularlv marked in those layers interstratified witli the Ajibik (juartzite, 

 the cleavao-e and schistosity stopping abruptly at the quartzite beds. Many 

 of the brecciated slates and novaculites are heavily ferruginous, the iron 

 being largely concentrated in veins. The extensive dynamic phenomena 

 sliowji V)y tlie formation about Goose Lake, and the complicated folding 

 of the slates, would seem to indicate) that in the general folding of the dis- 

 trict the major accommodations and readjustments necessary have occurred 

 mainly in the weak slate rather than in the strong Kona, dolomite below 

 or the Ajibik quartzite above. 



An examination of the thin sections confirms the field observations, 

 "While the fragmental character of the coarse slates is perfectly d'istinct, 

 the numerous roundish frag-mental grains being A^ery apparent, each indi- 

 vidual shows undulatory extinction or fracturing, as a result of the great 

 deformation. In pro})ortion as the rocks are fine-grained, recrystallization 

 has gone on, some of them becoming sericite-schists, which at first sio-ht 

 might not he thought to be fragmental. There is abundant evidence of 

 extensive deposition of silica and iron oxide, these materials being present 

 both as veins and in the background. No complete description of the slides 

 will be given here, as they are similar to the other slides of the formation 

 in tlie general area of Goose Lake, and a description of these is given at a 

 previous place (pp. 265-269). 



wewe Hills. — AYcst of Goosc Lakc (Atlas Sheets XXXII and XXXV) 

 occur the uiost extensive exposures of the formation. The positions of 

 ledges actually observed are given on the detailed sheets, but tliese by nc 

 means represent all of the exposures, but merely those which have beem 

 examined. 



Along and adjacent to the shore of the southwest arm of Goose Lake- 

 there are almost continuous exposures of mica-slate, graywacke, and 

 novaculite, from the old charcoal kilns nearly to the southeast end of the 

 lake. The rocks here are slaty or schistose, brecciated and cherty — in short, 

 in most respects are similar to those in sees. 13 and 24 above described. 



The most interesting exposures of the formation are those on the 

 Wewe Hills aljout the Archean islands in sees. 22 and 23. Here are found 

 at a numljer of localities great basal conglomerates, which pass up into the 



