28 GEOLOGY OF MOOSE RIVER GOLD DISTRICT "WOODMAN. 



cline is almost certainly a continuation of it. The eastward course 

 of the two folds does not come further into this study. Westward, 

 however, they are of special interest, on account of their con- 

 tinued convergence and final union a mile west of the settlement 

 (pi. 1, figs, a, b). The combined anticline stretches westward 

 through Mt. Tom, probably to Waverley. Its point of bifurcation 

 is partly a matter of estimate, as outcrops are few and little 

 trenching has been done ; but enough observations are possible 

 to give reasonable accuracy. 



Stratigraphic position of Moose River district. — The only 

 datum plane in the series available for broad structural study is 

 the contact between the Goldenville and Halifax formations. 

 North of Moose River lies a broad zone of the latter, and many 

 observations can be made between the two. South of the mines 

 there is no belt of black slate north of the Tangier granite, in 

 such line that a section through Moose River would intersect it. 



On the road north from the settlement, although outcrops 

 are numerous at the roadside and in the surrounding barrens, it 

 is difficult to get the structure with certainty. All the exposures 

 are of quartzite, and the weathered faces and superficial parts 

 easily reached with a hammer rarely sliow slate laminae. The 

 whin itself is too uniform to have visible stratification planes. 

 Such observations as are possible give steep north dips up to the 

 edge of the upper formation. Two miles west of the mines a 

 traverse north is possible under better conditions. Here the 

 dips vary somewhat, averaging 75° N., and giving a thick- 

 ness of 16,730 feet. The Moose River anticline plunges 

 westward throughout this region, and to the eastward lower and 

 lower strata lie against its axis at the surface. If 75° N. be 

 assumed for the average dip of the Goldenville beds north of the 

 mines, as seems reasonable in view of observations at the traverse 

 to the west and three miles to the east of the settlement, the 

 lowest exposed strata on the main north anticline lie 16,900 feet 

 below the base of the Halifax formation. 



