PRE-CAMBRIAN OF NORTHERN ONTARIO AND QUEBEC 309 



that series in a manner somewhat similar to the interflow conglomerates which 

 occur in the lower portion of the Keewanawan series. (2) They might belong 

 to an older Huronian series, that is, a series younger than the Keewatin but 

 older than the undisturbed Huronian. (3) They might be portions of the 

 ordinary flat-lying series which have suffered local disturbance. 



Wilson concluded to map all the mashed conglomerates under 

 the third hypothesis, as locally sheared Cobalt series. The only 

 evidence in support is given on page 38: 



It was also observed that in some outcrops where the mashed conglomerate 

 has a considerable vertical thickness, the schistosity appears to diminish from 

 the base upward, as if the contact of the flat-lying Huronian and the Keewatin 

 might have served as a plane of deformation. This phenomenon can be seen 

 in a conglomerate hill situated on the northern boundary of claim H.J.B. 21, 

 in McGarry Township. 



A plane of contact very commonly does function as a gliding plane 

 during folding, so that the rocks close to it are apt to be more 

 schistose than those farther away without regard to the age of the 

 series; but the foregoing inference would be valid only if the 

 schistose strata passed gradually into fiat-lying beds, which they 

 do not. The writer found that this conglomerate forms part of 

 the conglomerate of the Timiskaming series. 



To the east of Larder Village, across a small bay. Gold King 

 Point projects into the lake. The greater part of this point is 

 mapped as Keewatin on the early maps, with a small patch of 

 conglomerate near the southeastern extremity; but the point was 

 stripped clean of vegetation by fire three years ago, and the present 

 exposures show clearly that the conglomerate is not a patch but a 

 continuous band about 30 feet in width, dipping vertically and with 

 its strike swinging from north 60 degrees west at the southeastern 

 tip of the point to north near the Harris-Maxwell mine (Fig. 2). 

 The conglomerate, like that on the Larder townsite, contains 

 pebbles of basalt, rhyoHte, jasper and iron formation. It is 

 intruded by a feldspar porphyry like that of Kirkland Lake, and 

 by dikes of lamprophyre. On the east side, where not intruded by 

 porphyry or lamprophyre, it is in contact with massive basalt, 

 exhibiting good pillow structure, and contains basalt pebbles. 

 The rocks on the west of the conglomerate are not Keewatin, but 

 well-bedded greywackes, showing fine lines of cross- bedding in 



