50 GEOLOGY OF MOOSE RIVER GOLD DLSTRICT — WOODMAN. 



would bring these axes closer together after denudation to the 

 present surface, whereas in this division they are farther apart 

 than to the west. From the a.xis of the main syncline to that 

 of the north anticline, the distances average nearly the same in 

 both blocks. It is noticeable also that the distances between the 

 two anticlinal axes in divisions iii and i are practically the same; 

 and that the horizontal displacement of the south anticlinal axis 

 at the west fault, added to the amount of flexing northward 

 which it received south of the end of the middle fault, is equal 

 to the total horizontal displacement of the north anticlinal axis 

 by the latter fault. 



Appeal must be made, then, to some other movement, influ- 

 encing shearing, to account for the structure of this division. It 

 seems clear that the force which produced the chief faulting 

 of the district, first broke off as a single block all the rock 

 between the west and east faults, shoving it north nearly 

 fifty feet. Ln. the western part of the block, resistence 

 from the north compressed the folds to the extent of 37.5 feet. 

 The eastern part of the block, not meeting with so much resist- 

 ance, largely broke away from the western, along the line of the 

 middle fault. This break began at the north end, and died out 

 before it reached the axis of the southern anticline, because the 

 rock of division ii took up the compression so that it was slightly 

 felt so far south. There was, then, relatively no compression of 

 this eastern portion, the block moving north as a whole. This 

 explains the distance relations referred to above. 



There was, however, a bulging upward of the northern half, 

 due possibly to resistance on the north which was unable to 

 compress the strata as in division ii. This bulge had its southern 

 limit an undetermined but short distance north of the quarry on 

 areas 73 and 74. Thence northward the dips steepened to the 

 axis of the north anticline, which was tilted from 70° S. to 85° 

 S. The north end of this bulge must have been a considerable 

 distance beyond the field of the map, for the north anticline was 

 not compressed to an appreciable degree. Moreover, the angle 



