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Which type of rock is the most extensive at the surface of the continental United States?

by Guest56044  |  earlier

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Which type of rock is the most extensive at the surface of the continental United States?

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  1. Sandstone and shales cover central and south-west of the US but there are also limestone.


  2. Sedimentary rock covers 75-80% of the Earth's land area, and includes common types such as chalk, limestone, dolomite, sandstone, conglomerate and shale.

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