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Sedimentary rocks are rocks formed by the compaction or and cementation, along with some chemical alteration of sediments. There are four main categories of sedimentary rocks: clastic, organic, chemical, and evaporites. Limestone, a chemically precipitated sedimentary rock is formed by the compaction and lithification of the shells from marine organisms. Sandstone, is formed by the compaction of quartz grains.

2007-10-31 18:45:05 · answer #1 · answered by Kristenite’s Back! 7 · 0 0

potent potables, the pen is mightier, and colors ending in "urple"

2007-11-01 14:56:36 · answer #2 · answered by james_emmenecker 2 · 0 1

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