GEOLOGY OF MOOSE RIVER GOLD DISTRICT — WOODMAN. 53 



turn back the north anticline, else it would have steepened the 

 leads to the north, and lowered the dip of the axis. But the leads 

 on the whole are lower than to the west. The southern limit of 

 the bulge is probably not far south of the district. An uptlirust 

 of which the south anticline were the center would leave the 

 axial dip unchanged. If this fold were not the center, the dip 

 would be made higher or lower according as the fold were south 

 or north of the center. The axial change is 3° to a lower dip. 

 Hence the southern limit of the bulge should hi sought south of 

 the axis of the south anticline somewhat farther than the dis- 

 tance of that axis to the axis of the north anticline, which is 

 425 feet. There must also have been a compression of the 

 southern part of the block, accounting for the increased displace- 

 ment at that end. The amount recorded is 85 feet horizontally. 

 But the vertical upthvust of 260 to 270 feet, on an axis dip- 

 ping 85^ N., would cause the south anticlinal axis to migrate 

 50 feet south wdien eroded to the present level. Hence the total 

 transverse compression here amounts to 135 feet, becoming less- 

 northward. To produce this result there must have been ar 

 strong resistance on the north. 



Minor faults. — In the underground workings, minute faults 

 are constantly being found. These are in every conceivable 

 attitude, some in the stratification, some in the cleavage, but 

 most with strikes transverse to both. They are identifiable by 

 slight displacements of known horizons and by slickensides. 

 They exercise a compensating rather than a cumulative effect, 

 and thus do not alter the structure of an}^ portion of the district 

 to an appreciable extent. Certain effects of slipping along 

 cleavage will be considered later. 



Of the smaller faults shown on the map, none are important. 

 All are nearly or quite transverse, none radiating from the nof^es 

 of plunging anticlines, and none striking parallel with the sedi- 

 ments. Many follow joint planes. The one on areas 1'7 3 and 174 

 is one which does not displace the beds horizontally, but at which 



pRoc. & Trans. N. S Inst. Sci., Vol. XI. Trans.— E. 



