GEOLOGY OF MOOSE RIVER GOLD DISTRICT — WOODMAX. 41) 



extends south of the quarry admits of no doubt. But in tunnel, 

 ling the Smith belt east, it was not met, although the works 

 crossed the strike of the break. Instead of faulting to the north, 

 the belt departs from the normal strike, turning northeast, as 

 though dragged severely but not fractured. It appears, then, 

 that the fault stops short of this belt, probably close to it on the 

 north, and becomes at that horizon a very local cross fold. 



Middle faidt : essential unity of divisions ii and Hi. — In 

 deciding what is the character of the movement which division 

 iii has suffered in its faulting, it will not be necessary to go so 

 fully into the tl\eoretical possibilities as in the preceding case. 

 Divisions ii and iii are in some respects a single structural unit- 

 They are tlie only ones showing the Jo. Taylor belt. Both were 

 shoved north by the west fault, and the difference in attitude is 

 the result merely of a rupture within the block, at one end not 

 extending to the limit of the field. 



Middle fault : direction and character of movement. — 

 It is evident at once that a mere motion of translation, horizon- 

 tal, vertical or oblique, will not account for the growth of the 

 fault. It is equally evident, when tested quantitatively, that 

 the only shearing possible under the conditions — the east side 

 going up toward the north on a fulcrum at or few feet south of 

 the south anticlinal axis — would violate two conditions found in 

 the field. If the north end rose upon a fulcrum at the present 

 outcropping of the Jo. Taylor belt, so as to leave the latter where 

 it is found in division iii, the Copper lead might lie at its present 

 position east of the fault, but probably would be farther north. 

 This is upon the supposition that the axis of the north anticline 

 has been tilted from a dip of 70° S. to 85° S., which has occurred 

 But the axis of the south anticline would change its dip from. 

 82° S. to 83° N., instead of 85° S., its present angle ; and finallj^, 

 the movement would not account for the changes in the character 

 of the north anticline and the subsidiary folds south of it. 



Again, owing to the downward convergence of the main 

 anticlinal axes in division ii, a shearing of the north end upward 



