258 THE PICTOU COAL FIELD — POoLE. 



That a fault of the mag-nitude assumed should pass at this 

 point and produce no appreciable disturbance seems doubtful. 

 The rocks are well seen at the point in question and both above 

 and below it the strata have approximately the same dip and 

 strike, although the course given to the assumed heavy fault is 

 oblique to the strike. A grey conglomerate bed dipping N. 20'', 

 W. 50°, there crosses the brook and is succeeded by some thirty 

 feet of reddish strata that appear to represent the whole of the 

 Millstone Grit series ; in turn they are succeeded by grey sand- 

 stones lying conformabl}^ on them and unquestionably Coal 

 Measures.^^^ 



Turning eastward and crossing the range of Cambro-Silur- 

 ian rocks, limestone is found on its flank along the small branch 

 that joins Stewart's brook, and an interbedded band also is to 

 be seen lower down as described by Logan.^^^ The road too fol- 

 lows beside this brook and at a narrow pass near an old mill dam 

 and between the two exposures of limestone it is directly over 

 the fault, coursing parallel with the range and giving direction to 

 the brook, where it has Cambro-Silurian as a wall on one side and 

 Lower Carboniferous as a wall on the other side. The next ex- 

 posures^) with a southerly dip is on McLellan's brook, resting on 

 Cambro-Silurian near the mouth of a small brook corres- 

 ponding in its relation to the range to Stewart's brook, but 

 running along the flank of the hill range in an opposite and 

 easterly direction. In many places on this brook this series of 

 beds is seen associated with limestone bands dipping from 40° to 

 70" southward.S^) Next in a depression of Silurian at Mountville 

 and then to the south of the trap escarpment of McGregor's 

 mountain. 



The yellowish grey and reddish sandstones and crumbly red 

 argillites associated with the grey compact limestones of McLel- 

 lan's brook are with difficulty distinguished from those of the 

 Millstone Grit, but there are also, on the East River, beds 

 associated with limestones that are more altered and possibly be- 

 long to a lower horizon. These beds are first met with close 



Geol. Kept., 1869. (1) p. 52. (2) p. 7, line 24. (3) p. 8, line IS. (4) ibid, p. 9, line 12. Trans. 

 Vol. v., p. 213. 



