| Reference | {Deposit:: FILES OF THE CORTEZA TERRESTRE (SURFACE MINING PERMITS OFFICE), PUERTO RICO DEPARTMENT OF NATURAL RESOURCES, 1991.}{Deposit:: MONROE, W.H., 1969, GEOLOGIC MAP OF THE MOCA AND ISABELA QUADRANGLES, PUERTO RICO: U.S. GEOLOGICAL SURVEY MISCELLANEOUS GEOLOGIC INVESTIGATIONS MAP I-565, SCALE 1:20,000.} |