326 A. E. BARLOW — LAURIfiNTIAN AND HURONIAN ROCKS. 



of the portage is a flesh-red, distinctly foliated granitoid gneiss. At the 

 east end of the portage tins passes upward into a very gneissie quartzite, 

 whose distinct stratification is in marked contrast to the massive char- 

 acter of the gneiss. Under the microscope, Mr Ferrier says: 



"This rock consists mainly of quartz and feldspar, with a little musruvite and 

 epidote, and is a beautiful example of a sheared gneiss. It is cut by veins of clial- 

 cedonic quartz in many cases at right angles to the bedding." 



This rock in turn passes upward into the more usual feldspathic quartz- 

 ite whose elastic origin is undoubted. Both rocks dip S. 35° E. <60°, 

 the quartzite dipping into or under the gneiss. At a small point on the 

 eastern shore of Alice lake, just southeast of the portage into Baby lake- 

 is an exposure of yellowish-gray mica schist, with some dark green horn- 

 blende schist embedded in the gneiss, which rocks may represent an ex- 

 treme alteration of the Huronian quartzites and graywackes. 



WA UNA PITAL RIVER. 



Contact Indicated by Character of the Rocks. — Continuing still further 

 northeast the boundary strikes the Wahnapital river just below the 

 Canadian Pacific railway bridge. The actual contact is not seen, but on 

 the west side of the bridge are light greenish-gray feldspathic quartzites 

 with some thin interlaminated bands of darker-colored sandy shale, the 

 whole dipping N. 25° W. <60°-70°. On the opposite bank of the river, 

 near the railway station, is a dark gray, evenly foliated micaceous gneiss. 

 dipping S. 23° E. <60°. Ruby-colored garnets are exceedingly numer- 

 ous, the crystals frequently measuring from a quarter to half an inch in 

 diameter. The line of demarkation is occupied by the bed of the steam 

 for a short distance, when it again strikes inland, running parallel to the 

 general course of the river. At this place the recently constructed rail- 

 way for the Emery Lumber company nearly coincides with the line ol 

 junction for a considerable distance, and the contact is seen at several 

 places close to the road-bed. 



The Huronian Representative. — The Huronian exposed at several smal' 

 cuttings is represented by a dark gray, tinnly-beclded quartzite, rilled 

 with joints, which cause it to fall to pieces under the hammer, often 

 rendering it exceedingly difficult to obtain a satisfactory hand specimen. 

 It is very highly altered, showing almost complete vitrifaction, often 

 breaks with a conchoidal fracture, and is very similar to that described 

 as occurring near the contact on Daisy lake. Further to the northeast 

 the contact has only been examined at certain points, but it has been 

 thought advisable to postpone any further description in this direction 

 till it has been worked up in more detail. The foregoing description 



