Latitude: 40°0'50"N
Longitude: 75°38'14"W
Ref.: Dana, E.S. (1892) System of Mineralogy, 6th. Edition, New York: 1068.
Gordon, Samuel G. (1922) The Mineralogy of Pennsylvania: 170.
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: 961, 964.
A 19th Century Iron mine, located in East Whiteland Township (an historical locale) near Downingtown, which exploited residual deposits of Goethite and Limonite that formed along Shenandoah Limestone.
Located about 1/4 mile NW of the railway Planebrook Station.
Note on the mineral list: for "coeruleolactite" see references and information given for planerite, all turquoise group minerals are found to be planerite at this locality.
References
Foord, E.E. & Taggart, J.E. (1998): A reexamination of the turquoise group; the mineral aheylite, planerite (redefined), turquoise and coeruleolactite. Mineralogical Magazine, 62, 93-111.
Mineral List
8 entries listed. 6 valid minerals. 1 erroneous literature entry.
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