256 THE PICTOU COAL FIELD — POOLE. 



the great North fault, clearly marked to this point by the course of 

 Waters' brook. From the limestone quarry the crest of the range 

 extends to the south-east without escarpment on either side until 

 it overlooks New Glasgow town, and for this distance, about one 

 mile, there is no exposure or record of trial pit now known that 

 will demonstrate it to be as the Survey map has it, Devonian. 

 The surface indications rather point to Upper Carboniferous or 

 Permian, with nothing to shew of the North fault until the con- 

 glomerate again presents an escarpment to the south from a 

 point half a mile to the west of New Glasgow. 



Lower Carboniferous. 



This series occupies a large extent of country southward of 

 the altered rocks of McLellan's and McGregor's mountains It 

 extends westward across the East river to the Middle river, and 

 is found also on the northern flanks of the south range. Its out- 

 line is in parts obscure. 



Basal beds of coarse conglomerate are seen to rest on Silu- 

 rian strata on the west side of McLellan's bi'ook at the head 

 of the grist mill pond. There they hold many boulders of trap 

 possibly derived from the deposits of McGregor's mountain. A 

 coarse conglomerate, largely composed of fragments of diorite 

 from the Cambro-silurian on which it rests, is also seen. 

 These exposures are brought in contact with the limestone men- 

 tioned by Logan on Stewart's brook, that flows by Alexander 

 Fraser's house to join McLellan's brook. 



The exposures of this series are limited and shew few succeed- 

 ing beds, though doubtless many parts put down as belonging to 

 the limestone series really should be grouped with tiie basal 

 conp'lomerates. 



On Sutherland's river at Park's mills anl extending up 

 McLean's brook under the Carboniferous Limestone are con- 

 glomerate beds which Mr. Fletcher is disposed to consider as un- 

 conformable deposits.^^' Thus regarded, the removal of the South 

 fault of the Survey of 1869 to a more southerly position is facil- 



(1) Geol. Sur. Report, vol. IV, 69 P. 



