BULL. GEOL. SOC. AM. 



VOL. 24, 1912, PL. 9 



Figure 1. 



-View of Xephelixe Syexite Dike Five Miles Southeast of Mount Solox 

 Showing characteristic boulderv ledge outcrop 



Figure 2. — View of Camptonite Dike exposed along Public Highway One Mile 



N'oetb of Mossy Creek 

 Illustrating spheroidal weathering 



EXPOSURES OF NEPHELINE SYENITE AND CAMPTONITE DIKES IN NORTHERN AUGUSTA COUNTY, VIRGINIA 



