VIKdINIA OEOLOOtCAT. SUIIVKY. 



TT.ATR XVIi. 



]^-i„_ I — (Jeneval view of Tinner's clay pit, Ettricks, near rctersburg. 



Fig. 2. — View of sandstone blocks in old qnarry at Coles Landing. Aquia Creek. 

 Cr..\Y PIT AXD SATs^DSTONE l^LOCKS. 



