553 



dip W. 20° N. at 43°. The underlying beds are obscured 

 for some distance by cover, but within the fork of the two 

 limbs of limestone the underlying slates show a dip W. 20° N. 

 at 50° — these readings, both above and beneath the faulted 

 limestone, being very much in accord with the general strike 

 of the country. Near the fault-plane the limestone is some- 

 what altered, being metasomatized with the development of 

 ferric oxide and sporadic crystals of pyrites, while the joint 

 planes of the overlying quartzites are often coated by 

 micaceous hematite. At the angle of disruption there is a 

 little show of copper, mostly carbonate stains, and a little 

 prospecting has been done (the White Mine), but without 

 success. 



2. The same limestones come to the surface again at a 

 distance of something less than a mile to the eastward, being 

 repeated by a strike-fault which cuts the beds obliquely. 

 The outcrops follow a small valley that extends from the 

 mine road to Spring Creek. On the mine road the outcrops 

 are seen on the eastern side of the highest point where the 

 lower and less-pure beds of limestone make the best show, 

 crossing the road and entering the ground on the other side, 

 where they are obscured by cover. Following down the small 

 valley the main limestone is well developed on the left bank 

 and the impure limestone on the right. Within about 200 

 yards before reaching Spring Creek the limestones are cut 

 off against the purple-slates, but the main limestone reappears 

 in the northern banks of Spring Creek, the limestone having 

 been shifted out of the line of strike a little to the westward. 

 The limestone in the creek is of good quality, pinkish in 

 colour, about 20 feet in thickness, and has a dip W. at 50°. 

 It is not seen in the southern bank of Spring Creek, and 

 would not have been exposed at the surface but for the 

 channel cut by the creek, the limestone being covered in the 

 bank-face by the purple-slates. At a little distance along 

 the line of strike (on the top of the northern bank of the 

 creek) the limestone comes again to the surface for a short 

 distance, making an exposure 21' yards wide, but is soon cut 

 off again by the purple-slates. These features suggest that 

 the repetitions, which follow a lineal course, have been caused 

 by a strike fault, along the line of which the limestone rolls 

 at or near the surface, making small isolated exposures. 



3. The main limestone makes still another outcrop, a 

 little further to the north-east, just below the junction of an 

 important tributary that comes in from the west, having a 

 course almost parallel with Spring Creek. The limestone, 

 which outcrops on the left bank of Spring Creek about 100 

 feet to 150 feet above the level of the stream, runs nearly 



