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Crushed stone and construction sand and gravel, the two major types of natural aggregates, are among the most abundant and accessible natural resources on the planet. The earliest civilizations used aggregates for various purposes, mainly construction. Today aggregates provide the basic raw materials for the foundation of modern society.
Suggested Citation
Willett, J.C., 2012, Mineral resource of the month: aggregates: Earth, v. 57, no. 4, p. 25-25.