| Reference | {Deposit:: DIETRICH, R.V., 1954, GEOLOGY OF THE PILOT MOUNTAIN AREA, VIRGINIA: BULLETIN OF THE VIRGINIA POLYTECHNIC INSTITUTE, ENGINEERING EXPERIMENT STATION SERIES NO. 91, V. 47, NO. 4, 32 P.}{Deposit:: ESPENSHADE, G.H., RANKIN, D.W., SHAW, K.W., AND NEUMAN, R.B., 1975, GEOLOGIC MAP OF THE EAST HALF OF THE WINSTON-SALEM QUADRANGLE, NORTH CAROLINA-VIRGINIA: U.S. GEOLOGICAL SURVEY MISCELLANEOUS GEOLOGIC INVESTIGATIONS MAP I-709-B, 1 SHEET, SCALE 1:250,000.}{Deposit:: 1953 GEOLMAP VA. ENG. EXP. STA: SERIES NO. 91.}{Deposit:: 1971 GEOLMAP D.W. RANKIN: MISC. GEOL. INV. MAP I-709-B} |