GEOLOGY OF MOOSE RIVER GOLD DISTRICT — WOODMAN. 21 



areas; each of the latter being 250 feet north and south by 150 

 feet east and west. Thus each of the six blocks composing this 

 district contains 1,000 areas, and measures 7,500 feet east and 

 west in fifty areas' width, and 5,000 feet north and south in twenty 

 areas' length. The main settlement comprises a few areas in blocks 

 1 on the north and 4 on the south (pi. 1, fig. a, and pi. 2). 

 " West Mine" is in block 6 on the north, and south of it lies 

 block 5 (pi. 1, fig. a). 



Much trouble has arisen in the study and economic develop- 

 ment of gold-bearing properties in various parts of the province, 

 because the early surveys were carelessly made, and always by 

 magnetic meridian ; and in many cases either the date or the 

 declination has been omitted from the map. The declina- 

 tion has changed steadily, and in many districts resurveys have 

 detected errors in the older work, and the present area lines may 

 follow neither magnetic nor true meridians. This discrepancy is 

 especially marked where the lines have been run parallel and 

 perpendicular to the general strike of the rocks, as here. The 

 declination at Moose River in 1897 was approximately 22° 

 15' W. The north-south lines run 5° west of this, or about 

 27° 15' west of true north. In this paper all bearings are 

 referred to magnetic north. 



Method of approach to subject. — The survey of the Moose 

 River district formed part of an investigation into the pre- 

 Carboniferous history of the gold-bearing series. The spot was 

 selected for detailed study, partly because it appeared to be 

 typical of the seri es as a whole in many ways, and yet unique 

 in a few features — and in just those features favorable to the 

 study of the veins. I recognize that certain large problems in 

 Nova Scotian geology can never be solved until close, painstak- 

 ing, detailed work has been done on critical sections ; and while 

 the detail in this paper may at first appear excessive, the study 

 has been made deliberately, in the hope that it may lead to more 

 detailed work elsewhere in the series. 



pRoc. & Trans. N. S Inst. Sci., Vol. XI. Trans.— C. 



