238 ^ 



Millstone Grit. Hartley [9)], Fletcher [8 p. no], and Poole 

 [13] have stated that this unconformity is visible along the 

 course of Blackwood brook at points just to the west of 

 the crossing of the highway paralleling the west bank of 

 East river. Hartley and Poole unequivocally place the 

 underlying strata in the Millstone Grit, but Fletcher 

 states that possibly the beds belong to the Carboniferous 

 Limestone series. 



From the crossing of Blackwood brook by the highway, 

 a road leads westward along the south side of Blackwood 

 brook. From this road, ledges of the New Glasgow 

 Conglomerate may be seen outcroping along the north 

 bank of Blackwood brook. The coarse red conglomerate 

 presents very few indications of bedding but appears to 

 dip northward at an angle of about 40°. The conglomerate 

 is exposed at intervals along the low bluff extending west- 

 ward along the north side of the brook. 



On the road leading westward, one or two imperfectly 

 exposed outcrops of the underlying series occur, but they 

 are better exposed farther to the west in the gully of a 

 small waterway crossing the road near the northwestern 

 corner of the Athletic Grounds. In this gully occur 

 fine-grained sandstones, red in colour but irregularly 

 streaked with grey. Towards the mouth of the small 

 waterway, where it joins Blackwood brook, the sandstones 

 dip to the northeast at an angle of 70°; a short distance 

 up Blackwood brook, in the bed of the stream, the red 

 sandstones are vertical; a short distance farther up 

 stream, in the low bluff on the north bank, the sandstones 

 are in direct contact with the New Glasgow Conglomerate 

 and both sets of beds dip at very high angles to the north- 

 east without any evidence of angular unconformity. 



Thus even in the one place specifically cited by Hartley, 

 Poole and Fletcher, there is no conclusive evidence of the 

 existence of angular unconformity between the New 

 Glasgow Conglomerate and the underlying strata presumed 

 to be of Millstone Grit age. Where the exact contact of 

 the two formations is visible, no angular unconformity 

 is visible. The variations in the direction and value of 

 the angle of dip of the two formations, are no greater in 

 this neighbourhood than may be observed in the case of the 

 conformable series of beds composing the Coal Measures. 

 The conclusion is that west of East river, the New Glasgow 

 Conglomerate overHes the Millstone Grit without angular 



