246 THE PICTOU COAL FIELD — POOLE. 



of the anticline at^iove referred to ; lias a throw of 5 feet where it 

 is pierced by the Thii'd seam slopes, 13 feet at the bottom of the 

 Dalhousie A. pit increasino- to 19 feet where it crosses the barrier 

 between the Crushed and the Burnt mines, and thinning- out is 

 lost east of the Crushed Mines Bye pit. Its hade is to the north, 

 and the irregularity with which it breaks the strata is depicted 

 on the accompanying plan and section. (See Page '2.1^0.) 



The following sketch of the Crushed mines series of faults and 

 lypes illustrates the occurrence of the minor troubles met with 

 in parts of the workings which when they occur greatly interfere 

 with getting the coal {See illustrated section.) 



The Lawson fault ■ — Turns out to be oidy a " want " of limited 

 extent in the McBean seam, so that the conclusions based on its 

 assumed extent must necessariiy be now ahandoned.* It is, how- 

 ever, probable that the Yale section is cut by one Or two disloca- 

 tions approximately parallel to its course, but more to the east- 

 ward as indicated on the map by the break in the line of the out- 

 crop of the Six Feet seam. 



The McGregor fault remains as shewn on the map of 1869. 

 It has not been again exposed. It probably belongs to a series 

 of dislocations that accompany the synclinal folding of the strata 

 that lie on the northern flanks of the hill rano-e. 



The Bridge fault: — This fault crosses the East river at the 

 New Glasgow railway bridge. Apparently it has a course 

 parallel to Potter's brook fault, and repeats to the north the 

 series of black shales and the lowest numbers of the overlying 

 sandstones exposed on that brook above the V^ale railway cul- 

 vert, at the same time thrusting them to the west, repeating in 

 fact the operation which the Potter's brook fault began. This 

 fault is cut oft' to the westward by some one of the north and 

 south faults that cross the coal basin to the eastward of where 

 Muir's dip slants in the Foord pit, prove the trough shape of 

 the field in that locality. 



The Fidling Mill fault is one of a pair of parallel faults. 

 It is well exposed below the dam where the road crosses 



*Logan p. 33. 



