306 GEOLOGY OF A PORTION OF SHELBURNE CO., 



Economic Geology. 



The most valuable economic resource of the district is 

 granite. West of Shelburne near Hart Point and not over a 

 mile from the Halifax and South- Western Railroad is a gran- 

 ite quarr}^ in bed rock. This quarrj^ has been worked for a 

 number of years, the activity fluctuating with the demand 

 for the product. The granite was loaded on boats within a 

 short distance of the quarry. Also, an extensive quarry 

 business has been carried on in granite boulders here as well 

 as in other parts of the County. At present, granite is being 

 quarried from boulders near the railroad track and trans- 

 ported by rail. The granite appears to split easily and should 

 be very good for building purposes 



Ochre is reported at Upper Port LaTour. It occurs on the 

 north side of a hill west of the town. Ochre has also been 

 found a mile and a half south of this town, at the bottom of a 

 well hole 10 feet deep. Neither occurrence was investigated. 



Although quartz veins occur in this vicinity, no gold mines 

 have been opened. The saddle reefs of quartz, from which 

 most of the gold is secured in the Halifax district, could not 

 have been formed in a region so highly metamorphosed as 

 the one here considered. 



Summary. 



The pre-Cambrian Meguma or Goldbearing series was fold- 

 ed into a number of parallel anticlines and synclines and 

 dynamically metamorphosed in the Middle Devonian dias- 

 trophism. Granites, quartz diorites and aplitic granites were 

 intruded at this time, being caught in the last of the mountain 

 building movements. These intrusions produced extensive 

 contact metamorphism, staurolite schist being developed ten 

 miles from the nearest granite outcrop. Later, and probably 

 in late Carboniferous time, extensive block faulting took place. 



