GEOLOGY OF MOOSE RIVER GOLD DLSTRICT — WOODMAN.^ 45 



nearer together west of the break. The opposite condition ob- 

 tains. Finally, if not aided by some other movement, a vertical 

 one would leave the dips of the axes unchanged. 



(2) A horizontal motion of translation, unaccompanied by 

 any other change, would keep the axes equidistant on either 

 side of the fault, and would not alter their dips. Here the axes 

 on the east, accordino' to the best data obtainable, are forty feet 

 nearer together than on the west ; and their dips are altered. 



(8) An oblique motion of translation appears at first sight 

 to meet the conditions. By calculation, if the axes east of the 

 fault hold their dip, a movement of the east side up and north 

 118 feet at an angle of 60° from the horizontal would, upon 

 erosion to a level, give the axes of division ii the position which 

 they now occupy. But there are two other criteria. After an 

 upthrow and subsequent denudation, any horizon is farther from 

 the axis of an anticline tha,n before. As no strata or leads in 

 the two divisions have been proved identical, this test cannot be 

 used. But, second, east of the break the dips of the axial planes 

 €lre different from those to the west. Unless disturbed by some 

 other movement, they should remain unchanged. 



(4) A shearing might make the south end of division ii rise 

 or fall with respect to division i, on a fulcrum within the zone of 

 leads or north or south of it. Consider first the case of a ful- 

 crum between No. 7 on the north and the Root Hog on the 

 south. If the south side fell, the axes of the two anticlines 

 would be brought nearer tow-ether; the north migrating south for 

 a considerable distance because of its low dip, unless the 

 fulcrum were near it, and the south axis lying a very short dis- 

 tance north or south of its present position, depending upon the 

 position of the fulcrum. This obviously has not happened. If 

 the south rose, the axes would be farther apart, and the north 

 one would dip less than 60°, which is not true. Second, if the 

 fulcrum were beyond the axis of the north anticline, and the 

 south fell, a shearing of such sort as would place the north axis 

 in division ii where it is and give it a dip of 70° S., would make 



