| Reference | {Deposit:: FILES OF THE CORTEZA TERRESTRE (SURFACE MINING PERMITS OFFICE), PUERTO RICO DEPARTMENT OF NATURAL RESOURCES, 1991.}{Deposit:: MONROE, W.H., AND PEASE, M.H., 1962, PRELIMINARY GEOLOGIC MAP OF THE BAYAMON QUADRANGLE, PUERTO RICO: U.S. GEOLOGICAL SURVEY MISCELLANEOUS GEOLOGIC INVESTIGATIONS MAP I-347, SCALE 1:20,000.}{Deposit:: MONROE, W.H., 1973, GEOLOGIC MAP OF THE BAYAMON QUADRANGLE, PUERTO RICO: U.S. GEOLOGICAL SURVEY MISCELLANEOUS GEOLOGIC INVESTIGATIONS MAP I-751, SCALE 1:20,000.} |