Aggregates Matter

Crushed stone, sand, and gravel are the three kinds of rock fragments that are called aggregates. Consider: At the current rate of usage, every American will need 1.37 million pounds of aggregates in his or her lifetime. Aggregates are mined in every state in the nation. Aggregates are the most commonly used mined rocks in all countries of the world.

Groundwater Movement

Water that accumulates beneath the surface of the Earth is called groundwater. Contrary to popular belief, groundwater does not form underground "rivers," but is actually found in the small spaces and cracks between rocks and other material such as sand and gravel. The following activity involves learning how water moves through rock materials such as sand, gravel, and clay.

Reclaiming a Mine Site

Mined land is reclaimed for future use. The objective of this activity is to investigate how plants will grow on a reclaimed landscape. Over a period of days, you will learn how overburden is incorporated into the landscape after it has been removed during the mining process.Before beginning, discuss vocabulary terms: overburden, stockpile, grading, soil types, seeding, stability, seed germination, nutrients, closure planning, and reclamation.

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