Ottawa Silica Company Quarry (Rockwood Quarry), Rockwood, Wayne Co., Michigan, USA
Latitude: 42°4'N
Longitude: 83°15'W
A silica quarry in dark gray, friable sandstone. Owned by the Michigan Silica Co., then the Ottawa Silica Co. Workings are 3,000 feet long x 1,000 feet wide (for about 1/3 length) and 300 feet wide for the remainder of the length, and 50 feet high.
Mineral List
7 entries listed. 7 valid minerals.
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References
Rocks & Min.: 22:1012; 58:108.
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