What is non-metallic mining?
Non-metallic mining is the extraction of stone, sand, rock or similar materials from natural deposits. The most common examples of non-metallic mines are quarries and pits. Non-metallic mining is a widespread activity in Wisconsin. The variety of geologic environments support a diverse industry. An estimated 2,500 mines provide:

• aggregate for construction;
• gravel and crushed stone (limestone and dolomite) for road construction;
• dimension stone for monuments;
• volcanic andesite for shingles;
• peat for horticulture and landscaping;
• industrial sand for export out of state for the oil industry; and
• a considerable variety of materials for other uses.

Non-metallic mining does not include extraction of metallic mineral deposits containing metals such as copper, lead or zinc.