THE PICTOU COAL FIELD — POOLE. 257 



itated. The same conclusion may be drawn on examination 

 of points further west along the hill range on the north slope of 

 the older rocks, wnth a further suspicion that the old line of the 

 South fault is for the whole distance one of minor dislocations 

 only along an overlap of coal measures. A break of great 

 magnitude and continuity occurs on the south side of the rim of 

 the coal fields and to it as has been said may properly belong 

 the prominence given to the South fault. 



Carboniferous Limestone : — Witliin this system are included 

 both the beds associated with compact limestones of McLellan's 

 brook and those of the East river from Riverton to Hopewell 

 but besides both containing limestone with obscure fossils they 

 present no features in common, and it is not at all improbable 

 that the latter, more altered and shattered than the former, may 

 yet be classed as a distinct group, or possitdy Upper Devonian. 



Overlying the hasal conglomerates just referred to on Suther- 

 land's river is a bed of gypsum and one of limestone, and simi- 

 larly above the bridge on McLean's brook there is the deposit 

 at Finlay McDonald's mentioned by Logan,'^' which higher up is 

 deflected across the brook just below' the saw mill dam, below 

 which gypsum is also seen. In 18G9 this locality was obscured 

 by a pile of slabs. Now^ the rocks are well exposed and shewn 

 to be vertical and parallel with the dislocation that limits the 

 coal measures east of the Vale area. Higher up McLean's brook 

 the limestone is again seen wdth gypsum near grey conglomerate 

 at the base of the hill range, where they do not seem to have been 

 noted by the Surv^ey of 1869. 



The last exposure indicating the presence of beds of this series 

 directly underlying coal measures on the north side of this range 

 is on McLellan's brook at the head of the mill pond. The basal 

 conglomerate already referred to appears in the bank of the 

 brook both above and below the Silurian rocks. Grey rubbly 

 sandstones overlie the conglomerate and then comes the bed of 

 compact grey limestone/^) in turn succeeded by beds of sandstone 

 and red argillite, dipping N. 45° W. 30° down the brook to the 

 point below the grist mill wdiere the South fault was placed 



(1) Logan's Report, p. 40, line 7. (2) p. 8, line 34. 



