A very real problem to address

摘要

A growing problem in the aggregate industry is the decreasing availability of updated and refined geological information that's needed to support the long-term development and production of crushed stone. Geology is the primary control on the availability of high-quality stone resources in major markets. With lower initial production levels, less precise quality requirements and few, if any, zoning restrictions, it was much easier to produce these resources in 19th-century Chicago and Milwaukee, for example.