| Orris, G. J., Carbonaro, Marguerite, with contributions by Allen, M. S., Bliss, J.D., Ruiz, A.H., Kibbe, Richard, Paidakovich, M.E., Page, N.J., Pierce, H.A., Staude, J.G. (1992) Puerto Rico; industrial mineral mines, prospects, and occurrences in the Mineral Resources Data System (MRDS) Open-File Report Vol. 1992 (92-244) US Geological Survey doi:10.3133/ofr92244 | Report (issue) | and road metal, gypsum, barite, and phosphate. Other commodities such as barite, clay, and dolomite are...geographic feature. If not named, tjhe site may be "unnamed." or "unidentified" if likely named but the reporter...ash (see vole, mat.) CLY4 ball clay BA. barium, barite CLY1 bentonite CLY6 bloating material (includes...phosphorus-phosphates K potassium PUM pumice PYR pyrite PYR1 pyrrhotite PYF pyrophyllite QTZ quartz (see...Disseminated Evaporites Gossan Greisen Laterite Lode use vein if possible Massive chromite Massive sulfide Metamorphic |
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