Block of solid mica blasted loose from pegmatite at George Roebling mica mine. Litchfield County, Connecticut. 1923.
Dates
Date Taken
1923
Summary
Block of solid mica blasted loose from pegmatite at George Roebling mica mine. Litchfield County, Connecticut. Before 1923. Plate 10 in U.S. Geological Survey. Bulletin 740. 1923.
Summary
Block of solid mica blasted loose from pegmatite at George Roebling mica mine. Litchfield County, Connecticut. Before 1923. Plate 10 in U.S. Geological Survey. Bulletin 740. 1923.
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