72 HONEYMAN^ON THE GEOLOGY OF NOTA SCOTIA. 



pass northward on the sides of the mountain, where I collected 

 characteristic fossils. They continue their course until they termi- 

 nate near a small lake which supplies a small stream which descends 

 into Sutherland's river, below McPherson's mill. In this stream 

 there is a section of rocks which deserves attention. Above the 

 road it passes over a greenstone rock, and then crosses the bank on 

 the right with an exposure of lingula shale, whose relation to the 

 other rocks I was puzzled to understand. It is at all events the 

 last of the silurians on the north of the Sutherland river siluriart 

 field. Farther up the greenstones rise in a gorge, making a nice 

 little waterfall. This greenstone reaches to within a little of the 

 lake, and then passes over in a northeasterly direction. On the 

 north east side of this little lake is an outcrop of silurian strata, 

 which is probably of Clinton age. Farther east we come to 

 McBeath's, and find outcrops of lower Helderberg strata, with a 

 low northerly dip. Fvery heap of stones around furnish lower 

 Helderberg fossils. Passing on to the mountain that stands highest 

 in the range, east of Sutherland's river, I found the ridge of strata 

 on the summit to be lower Helderberg. South east of this are 

 lower elevations, having lower strata, metamorphic, which terminate 

 rather abruptly, with a steep descent ; at the bottom of this runs 

 a small brook, which appears to be the continuation of the small 

 stream which enters Sutherland's river, near its falls, as I have al- 

 ready noticed. As I have got back to this point, I v^ould turn at- 

 tention to a Binocular arrano^ement of the silurian formations in this 

 tlirection. The Helderberg strata of the river and of the fall of this 

 small stream, are seen to be underlaid by dark shales with lingulse. 

 These are exposed on the side of the road, and in the bed of the 

 stream : they are Clinton shales. Passing along the road toward 

 the Blue Mountain, I found beyond Plolmes's store an outcrop 

 of strata, on the left side of the road. Here I collected, in situ^ 

 characteristic lower Helderberg fossils. Now this happens to be a 

 continuation of the lower Helderberg strata of the lofty mountain 

 last referred to. So that we have two sets of lower Helderberg 

 strata, viz : the river strata and the mountain strata, both dipping 

 in a westerly direction, but diverging northerly, having an older 

 formation lying between them. The converging direction being 



