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What is Sedimentary Rock?Sedimentary rocks form when layers of sand, mud, organic matter and eroded particles deposit as sediments at the bottom of the rivers, lakes, and oceans. This deposition of layer over layers continues for millions of years until the bottom layers slowly turned into rocks due to compressive forces exerted by the top layers. Sedimentary rocks, mostly consist of weathered remain of igneous rocks along with organic matter from the remains of marine organisms.These rocks comprise only about 5% of the earth’s crust. In spite of it, sedimentary rocks cover about 75% of the total land surface.

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What is Sedimentary Rock?Sedimentary rocks form when layers of sand, mud, organic matter and eroded particles deposit as sediments at the bottom of the rivers, lakes, and oceans. This deposition of layer over layers continues for millions of years until the bottom layers slowly turned into rocks due to compressive forces exerted by the top layers. Sedimentary rocks, mostly consist of weathered remain of igneous rocks along with organic matter from the remains of marine organisms.These rocks comprise only about 5% of the earth’s crust. In spite of it, sedimentary rocks cover about 75% of the total land surface.

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Sedimentary rock - formation under the sea

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Sedimentary rocks formation by breaking down | Learning Geography through observation

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Examples of sedimentary rocks

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Sedimentary Rocks – Layers of Time

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Limestone is used to make cement. Quartz is a type of sedimentary rock which is used to make glass. Rock gypsum is used to make plaster. Natural gas, oil, coal, and uranium, and other energy resources are formed in and come from sedimentary rocks.