Reference | {Deposit:: RECORDS OF THE CORTEZA TERRESTRE (SURFACE MINING PERMITS OFFICE), PUERTO RICO DEPARTMENT OF NATURAL RESOURCES, 1991.}{Deposit:: BRIGGS, R.P., AND AGUILAR-CORTES, E., 1980, GEOLOGIC MAP OF THE FAJARDO AND CAYO ICACOS QUADRANGLES, PUERTO RICO: U.S. GEOLOGICAL SURVEY MISCELLANEOUS INVESTIGATIONS MAP I-1153, SCALE 1:20,000.} |