Newly recognized en echelon fall lines in the Piedmont and Blue Ridge provinces of North Carolina and Virginia, with a discussion of their possible ages and origins
Newly recognized en echelon fall lines in the Piedmont and Blue Ridge provinces of North Carolina and Virginia, with a discussion of their possible ages and origins [microform] / by Robert E. Weems.
Published
Reston, VA : U.S. Geological Survey ; [Denver, CO : Branch of Information Services, distributor], 1998.
Physical Description
28 leaves, [12] leaves of plates : ill., maps ; 28 cm.