383 



have been replaced by intrusive rocks. The quartzite and 

 Hmestone presumably belong to the same series but it is 

 not knowTi whether the quartzite underlies or overlies the 

 limestone. 



The quartzites are exposed at intervals along Lake 

 Drive North. At a series of exposures where this roadway 

 rises over a low hill, the quartzites are comparatively 

 coarse grained and are distinctly bedded, the strata being 

 nearly vertical. The quartzites are exposed along the 

 roadsides to the top of the rise but farther on, as the road 

 descends to where a branch road runs east to the shores of 

 Lily lake, decomposed gneissic rocks outcrop. 



Gneissic rocks are exposed along the driveway from the 

 point of junction of the branch road, northward to where 

 the main road bends to the northeast beside a small stream. 

 The gneisses are of medium to fine grain, are dark coloured, 

 flecked and streaked with pink and are strikingly foliated. 

 The rocks have the mineral composition of a biotite or 

 hornblende granite and appear to be deformed granites. 

 They occupy a narrow band-like area reaching a few 

 hundred yards to the east but extending much farther to 

 the west where they join a large area of granite. The 

 relations of the gneissic rocks with the granite are unknown. 

 Possibly the gneissic rocks have resulted from the local 

 deformation of the granite. 



The area of deformed granite is bounded on the north 

 by a band of crytalline limestone which extends to the 

 southwest as a long narrow band surrounded by granite. 

 The limestone is bounded on the northwest side by granite 

 and the roadway crosses and recrosses the line of contact. 

 The limestone is of the same general character as the rock 

 of the calcareous band striking across Lily lake. The 

 granite occurring on the northwest side of the limestone 

 band, is of medium grain, usually pink in colour and poor 

 in coloured bisilicates which include both biotite and horn- 

 blende. In the neighborhood of the contact with the lime- 

 stone, aplite dykes occur in the calcareous rocks. 



The granite body shows slight variations in texture and 

 composition from place to place. Small patches of foreign 

 material occur. Small detached blocks of crystalline 

 limestone also lie within the granitic rocks; one such block 

 with a major diameter of about 35 feet occurs on the 

 roadside towards the western end of the larger of the three 

 lakes lying north of Lily lake. Along the road leading 



