THE PICTOU COAL FIELD — POOLE. 255 



range and some of those of the south range at Park's mills and 

 McLellan's mountain, although he did not himself examine 

 both localities. The similarity is marked and yet it is not with- 

 out question that they are identical. Perhaps the least dissimilar 

 are the compact greenish grey rocks of Park's mills and those on 

 the top of Waters' hill. The slates also on the north side of the 

 latter hill while resembling the Silurian of McLellan's mountain 

 are not so line nor do they weather so friable and white as those 

 of the mountain. Neither are the brecciated felsites and greenish 

 conglomerate nor the bluish slates with imperfect cleavage of the 

 north ran^e known elsewhere in the neiofhourhood. Some of the 

 slates are light coloured and micaceous, others are reddish, pro- 

 bably stained by the Permian rocks that at one time overlaid 

 them, while elsewhere the slates are bluish black, much shattered 

 and veined with calcite. 



On descending McCulloch's brook and leaving Waters' hill some 

 forty chains behind, it is found to flow over New Glasgow 

 conglomerate which appears to rest on a nearly horizontal sur- 

 face of old rock and to occupy an ancient ravine, which the 

 brook again intersects further down at other two points. 



The bed of the brook averages fifty feet in width while the 

 ^orge or channel has a breadth in man}^ parts of three times that 

 distance, with banks ranging up to 1)5 feet in height. Covered 

 largely \vith moss there are no rills to give exposures, but so far 

 as can be judged of the debris the hills surrounding the conglom- 

 erate of the gorge are of metamorphic rocks capped probably on 

 the northern side of the brook for the most part by conglomerate. 



Returning to Waters' hill it has its highest knolls of the 

 altered rocks overlaid on the north side by Lower Carboniferous 

 and on the south side there is seen the outcrop of altered lime- 

 stone which the Survey considers Devonian,* though Dr. Honey- 

 man contended that it is Lower Carboniferous. The central 

 knoll which presents the steepest escarpment to the south has 

 at its base Power's quarry, which is in the sandstones of 

 the carboniferous, and from which they are separated by 



*Acad. Geol., p. 502. 



