Quarry face, Collinsville quarries. Lithonia, DeKalb County, Georgia. No Date.
Summary
Quarry face, Collinsville quarries, Lithonia. At right of the quarry face is the original surface of the rock-granite-gneiss; at left is a smoother surface due to a parting developed by the shock of blasting, but predetermined by rock conditions.
Summary
Quarry face, Collinsville quarries, Lithonia. At right of the quarry face is the original surface of the rock-granite-gneiss; at left is a smoother surface due to a parting developed by the shock of blasting, but predetermined by rock conditions.
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