Tuesday, January 27, 2009

SEDIMENTARY ROCK
For thousands of years wind and water has been eroding earths surface. Bits of earth wash away by streams and then settle in the bed of lakes, oceans, and rivers. The layers pile on top of each other and form pressure on the bottom layer. Causing sediments to form sedimentary rock.
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1 comment:

  1. dolphinsFebruary 18, 2009 at 5:57 PM

    this is about the sedimentary rock, and how it changes to other rocks.

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