Latitude: 38°49'32"N
Longitude: 77°29'27"W
A trap rock quarry in both diabase and hornfels.
World-famous for exceptional apophyllite-(KOH) crystals. Meier and Kearns (2011) determined much if not all of the northern Virginia are uniformly near end-member apophyllite-(KOH) and verified its occurrence at this locality. (Lance Kearns, personal communication, 2011).
References
GOOCH, E.O., WOOD, R.S., AND PARROTT, W.T., 1960, SOURCES OF AGGREGATE
Rocks & Min.:60:166.
- Medici, John C. (1972) Minerals of the Fairfax Quarry, Centreville, Virginia, Mineralogical Record, 3: 173-179
SWEET, P.C., 1980, DIRECTORY OF THE MINERAL INDUSTRY-1979: VIRGINIA DIVISION OF MINERAL RESOURCES, 55 P.
Meier, B. M. and Kearns, Lance E., 2011, Chemical Characterization of Northern Virginia Apophyllite, (K, Na)Ca4Si8)20(OH, F).8H2O, 38th Rochester Mineralogical Symposium Progran and Abstracts, p. 25-27.
Mineral List
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