Art. VII.] 



Watson, Virgilina Copper District. 



103 



mate north-south distance of 18 miles along the ridge and to an 

 average cross distance of from 2 to 3 miles. Although of no 

 conspicuous height, the ridge forms a somewhat prominent 

 feature in the landscape. 



Figure i. — Virgilina Copper District, Virginia and North Carolitta. 

 Copper district indicated by shaded area. 



Natural outcrops of the rock are by no means common 

 and are seldom more than 3 feet high, forming sharp and nar- 

 row spurs or reefs, which persist for only short distances. The 

 numerous shafts sunk over the greater part of the belt to depths 

 of 40 to 500 feet afford excellent opportunity for exceptional 

 collections of the rocks and ores. 



