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Sedimentary Rocks
Part 1 of Paper
....of older rocks.
The sedimentary rock cover of the continents of the earth's crust is extensive, but the total of that being of is estimated to be only five percent of the total. contain important information about the history of the earth. They contain fossils, the preserved remains of ancient plants and animals. The.... Part 2 of Paper
....the breakdown of rock into particles without producing changes in the chemical composition of the minerals in the rock. Ice is the most important agent of mechanical weathering. Water percolates into cracks and fissures within the rock, freezes, and expands. The force exerted by the expansion is sufficient to widen cracks and break off pieces of rock. Heating and cooling of the rock, and the resulting expansion and contraction, also aids the process. Weathering contributes further to the breakdo.... |
| Number of words: 693 - Approximate pages: 3 |
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