BULL. GEOL. SOC. AM. 



VOL. 17- 1905. PL. 69 



Figure 1. — McGowan granite Quarry, south of Richmond, Virginia 

 Showing sheeting from horizontal jointing approximately parallel to the surface 



Figure 2.— Vertical and horizontal Jointing, Netherwood granite Quarry, west of jmchmond 

 GRANITE QUARRIES IN VIRGINIA 



