Sedimentary Rocks
What are Sedimentary Rocks?
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Sedimentary rocks are formed by sediment that is deposited over time, usually as layers at the bottom of lakes and oceans.
Sedimentary rocks cover the majority of the Earth's rocky surface but only make up a small percentage of the Earth’s crust compared to metamorphic and igneous types of rocks.
Sedimentary rocks forms layers called strata which can often be seen in exposed cliffs.
Sedimentary rock often contains fossils of plants and animals millions of years old.
The sediments that form sedimentary rocks comes from other rocks that has been weathered over the years by rain, wind and snow.
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