THE PICTOU COAL FIELD. — POOLE. 335 



Ft. In. 

 Grey shales witli 5 ft. bed of compact 



sandstone 69 



Coal of fair quality 2 



Measures 87 



Grey conglomerate 4 



Measures 22 



Sandstone dip N. 70°, W. 30° over con- 

 cealed measures 54 



Measures 50 



Black shales 4 



Underlaid further down the brook by quarry sandstone dip- 

 ping at an angle of 50°. 



The base of Logan's section 9 is a greenish drab conglomerate 

 dipping 58'^ at a sharp double turn of the brook where a fault 

 of 4 ft. coursing N. 85 E. cuts the tilestones which in turn are 

 overlaid by a foot of black shale containing fish remains, then 

 4 ft. of flaggy sandstones and other 6 in. of black shale. These, 

 by the measures described, which include over a compact band of 

 gre}'^ sandstone, an arenaceous argillite that weathers brick red. 

 Below the base some 200 feet another bed of greenish conglom- 

 erate appears among the vertical measures that rest against the 

 red rocks and purple conglomerates of Lower Carboniferous. 



The measures of Section 7 behind the village of Thorburn 

 likewise dip at an increasing angle, as they are followed south- 

 ward from 32° to 55° at their base. These latter rocks, Sir 

 William notes, (page 34) " contain many bands of sandstone 

 which weather to various tints of red giving them externally the 

 aspect of beds belonging to the Millstone Grit, and without care- 

 ful examination they might be mistaken for such." In an earlier 

 part of this paper, when referring to the Red Rocks of the field, 

 it was suggested that this mistake had been made in Mr. Hart- 

 ley's division. The supposition thrown out by Logan, page 33, 

 that the McBean seam might be sought for on the western side 

 of the syncline, near the mouth of Marsh brook, was carried out 

 in 1878 by the Acadia Coal Co. ; and again, ten years later by 



