ocr: USGS science fora achanging world Geology, Geochemistry, Geophysics, Mineral Occurrences, and Mineral Resource Assessment for the Commonwealth of Puerto Rico Editor: Walter J. Bawiec U.S. Geological Survey Open-File Report 98-38 2001 U.S. Department of the Interior Prepared in Cooperation with the Puerto Rico Departmant of U.S. Geological Survey Natural Resources andi the University ofl Puerto Rico at Mayaguez
