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Why are sedimentary rocks important?

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Sedimentary rocks are important because they are widespread and because many of them, such as coal and limestone, are economically important. About three-fourths of the surface of the continents is blanketed with a relatively thin skin of sedimentary rocks. read more

Because sedimentary rocks tend to be more porous than igneous or metamorphic rocks, they are more likely to contain water, oil and natural gas. Explanation: Sedimentary rocks form from the lithification (think "rockification") of separate sediments usually through the addition of some type of natural cementing agent. read more

Unlike the other two great classes of rocks, namely igneous and metamorphic rocks, sedimentary rocks can host important resources of fossil fuels such as oil, gas and coal or form significant aquifers for water - such as the Great Artesian Basin of eastern Australia. read more

Rocks can broadly be classified into three categories: sedimentary, igneous and metamorphic rocks. These classes, which are based on the rock's origin, determine the structure and use of the rock. Rocks are important in the making of many objects, such as plates, jewelry and toothpaste. read more

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