| Reference | {Deposit:: FILES OF THE CORTEZA TERRESTRE (SURFACE MINING PERMITS OFFICE), PUERTO RICO DEPARTMENT OF NATURAL RESOURCES, 1991.}{Deposit:: GLOVER, L., III, PEASE, M.H., AND ARNOW, T., 1977, GEOLOGIC MAP OF THE PLAYA DE PONCE AND SANTA ISABEL QUADRANGLES, PUERTO RICO: U.S. GEOLOGICAL SURVEY MISCELLANEOUS FIELD STUDIES MAP MF-886, SCALE 1:20,000.} |