TY - BOOK AU - Southwick, D. L. AU - Reed, John Calvin, AU - Mixon, Robert B., CN - QE75 CN - QE75 CY - [Washington, DA - 1971] ID - 235223 KW - Geology, Stratigraphic KW - Geology, Stratigraphic KW - Geology KW - Geology PB - U.S. Govt. Print. Off., PP - [Washington, PY - 1971] T1 - The Chopawamsic Formation--a new stratigraphic unit in the Piedmont of northeastern Virginia, TI - The Chopawamsic Formation--a new stratigraphic unit in the Piedmont of northeastern Virginia, ER -