WEST VIRGINIA GEOLOGICAL SURVEY. 607 



the Pittsburgh Coal and varies from 2 to 5 feet in thickness. 

 It was observed generally in Hackers Creek, eastern Freemans 

 Creek, and in portions of Courthouse and Skin Creek Districts, 

 Lewis, but was seldom found in good development in Gilmer. 

 This limestone, as described previously, has a hard, firm ap- 

 pearance and would make good road material, either in the 

 form of macadam or as concrete aggregate. Its position at 

 any point may be found by reference to Map II, which shows 

 the crop of the Redstone Coal above, and the Pittsburgh be- 

 low it. A physical test of this limestone is published on a sub- 

 sequent page. 



Brick. 



The use of brick, made from stratified clays and shales, 

 for road material, has been tried with marked success in many 

 of the more populous and progressive counties of the State. 

 The great amount of material available in every district in the 

 two counties, with cheap natural gas for fuel, and cheap con- 

 vict labor, probably offers the most suitable means of improv- 

 ing the roads, as this method would reduce to the lowest pos- 

 sible minimum the amount of money spent for labor and ma- 

 terial outside the district, and would lessen appreciably the 

 ultimate burden on the taxpayer. 



BUILDING STONE. 



In Chapters V to VII, the sandstone quarries of the two 

 counties have been described in detail under their respective 

 geological horizons. The following table gives a list of such 

 as have been quarried and previously described, with page 

 references to their detailed accounts : 



