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Reference Terms
from Wikipedia, the free encyclopedia

Sedimentary rock

Sedimentary rock is one of the three main rock groups (along with igneous and metamorphic rocks) and is formed in four main ways: by the deposition of the weathered remains of other rocks (known as 'clastic' sedimentary rocks); by the accumulation and the consolidation of sediments; by the deposition of the results of biogenic activity; and by precipitation from solution.

Note:   The above text is excerpted from the Wikipedia article "Sedimentary rock", which has been released under the GNU Free Documentation License.
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