Transcript -- How a quarry works Earth's physical resources: rocks for roads - for iPod/iPhone

    • Cursos

Quarry managers explain how rock is formed and how they extract different layers of stone. Once blasted and processed, it is used to build roads.

  • The Open University 2009

Quarry managers explain how rock is formed and how they extract different layers of stone. Once blasted and processed, it is used to build roads.

  • The Open University 2009

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