HUMMOCK Y ARCHEAX SURFACES. 165 



is of the same uneven character as that of the uncovered, glaciated country 

 to the north. Similar contacts may be seen inland a short distance, near 

 the head of the lake ; and on Gunflint river the Laurentian gneiss, in low 

 roches moutotmees, appears partially encircled by the Animikie rocks. 



On the north side of North lake there flows in a creek at the bottom of a 

 deep gorge, which cats down through 200 feet of flat Animikie strata to the 

 basement of Laurentian gneiss upon "which they rest; and the basement is 

 distinctly roches moutonnees. Similar conditions are observable two miles 

 up the creek which flows into the east end of North lake, and on Sand lake, 

 where escarpments of Animikie strata overlook and appear to overlie a hum- 

 mocky surface of Laurentian gneiss. The same is true of the escarpments in 

 the vicinity of Little Gull lake. 



To the north and northeast of Little Gull lake is a group of five small 

 steep-sided, flat-topped hills, known as the Outpost hills, which are outliers 

 of the Animikie, capped as usual with a sheet of columnar trap. The dis- 

 tance which separates them from the main area of these rocks varies from 

 one to four miles. This space is occupied by a very hummocky and roches 

 moutonnees stretch of Laurentian gneiss which maintains the general level 

 of a line extending from the base of the Animikie on the face of the escarp- 

 ment to the base of the same series, where it rests on the Laurentian at the 

 foot of the Outpost hills. The writer has been over the ground between the 

 escarpment and the hills; and Mr. E. D. Ingall, of the Geological Survey 

 of Canada, who has examined the hills carefully, informs the writer that 

 the actual base of the Animikie may be distinctly observed resting upon 

 the uneven, hummocky Laurentian surface, the sections being perfectly ex- 

 posed. 



Less than half a mile above Kakabeka falls small outlying patches of the 

 basal beds of the Animikie may be seen lying in the hollows of the mam- 

 millated surface of the Laurentian, and the latter, as it rises from beneath 

 the Animikie, above the falls, is exceedingly hummocky. 



Along the Dawson road, a few miles back of Port Arthur, low, rounded 

 domes of Laurentian gneiss appear in the midst of the Animikie, projecting 

 above the level of the local upper beds. 



On Current river the Laurentian rises in hummocky hills from beneath the 

 Animikie slates and traps, although the actual contact has not been observed. 

 Between this and McLean's siding, seven miles east of Port Arthur on the 

 Canadian Pacific railway, the Archean rises in the same hummocky hills 

 from beneath the Animikie, the line of contact being concealed by a narrow 

 strip of swamp. At the siding the contact is only concealed by the width 

 of the road-bed, and the surface of the Laurentian gneiss is seen to plunge 

 down under the flat Animikie rocks with the slope of a steep dome, appear- 

 ing again in a less prominent but still hummocky outcrop close to the con- 



