GEOLOGY OF MOOSE RIVER GOLD DISTRICT — WOODMAN. 65 



stratification, while no one member of it does. In the best 

 parts of the Kaulbaek belt, several veins run parallel to the 

 bedding for a short distance, then oblique to the dip, then 

 parallel again, and so on. The stringer described earlier as a 

 thinning stratified vein, is part of this system (pi. 11, fig. c). 

 Its upper edge stops 60 feet below the surface where cut in the 

 north tunnel ; and this terminus is lower and lower as one goes 

 west, the line of limit having a plunge of 40" W. There are 

 probably many such blind veins. 



Six feet below the top of the drift in the level mentioned 

 above, this vein cuts across the strata, and continues this relation 

 from there down, receding from the axis of the anticline on the 

 side of which the strata lie, more rapidly in depth than do the 

 sediments. That is, the dip measured over a considerable section 

 is less than that of the strata. With all its cross-cutting the 

 vein retains its corrugation. On the whole the waves may be 

 slightly larger where not parallel to the bedding. This may be 

 due to the fact that in these portions the vein is considerably 

 thicker than when conformable. In such places it breaks up 

 into several stringers, which reunite later (pi. 12, figs, b, d). 

 This occurs at the south tunnel in the 60-foot level, in a 

 section in which bedding and cleavage are clearly shown. It is 

 noticeable everywhere that veins do not as a rule break upward 

 into overlying beds, but rather break upward into underlying 

 strata, as in pi. 12, figs, a, c. The exceptions are angulars 

 starting definitely upward from a bedded lead. 



Cremdations : effects upon secondary structures. — Both 

 joints and cleavage are turned out of their course by the sharp 

 curving of resistant quartz veins, where the structures reach the 

 crest of a fold. Joints are but broadly curved, cleavage sharply ; 

 and some of the planes of fissility are deflected past one side of 

 the obstructing corrugation, some past the other, making a 

 curved divergence of the fractures (pis. 8, fig. b, and 14, 

 15, 16). 



