Mona Island, Mayaguez, Puerto Rico
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|Latitude & Longitude (WGS84):||18° 6' North , 67° 54' West|
|Latitude & Longitude (decimal):||18.1, -67.9|
Major guanno production from caves in the cliffs surrounding the island. Phosphorite was mined in the 1877 to 1924 period.
6 entries listed. 5 valid minerals.
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Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 661, 705.