VIRGINIA GEOLOGICAL SURVEY. 



PLATE XL 



Fig. 1. — Excavation at Richmond. Showing grave 

 formation. 



ami hianis ot' the Suiidi'ilaiKl 



/"^^i^^-*^-^ -^tm-: .. 



Fig. "2. — Fxca\atiiiii at W'asliington, D. ( '. Showing llif WirnmiiMi inniiaiKin over- 

 lying crystalline rocks. 



SrXDKlU.ANl) .\NI) WICOMICO KOinivXTlOXS. 



