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The Rock Cycle
The Rock Cycle

... to break down. They fall gets all the way apart into large and small to the ocean. pieces. Each piece is called a particle. The pieces can pile up in layers. That is called sediment. They are deposited as strata. Strata are layers of rock and soil in the earth. When water flows it can have lots of p ...
Chapter 4—Rocks and Minerals: Documents that
Chapter 4—Rocks and Minerals: Documents that

... mineral (50): A naturally occurring, solid, inorganic substance having a specific chemical composition and a specific crystal structure. nonsilicate mineral (56): Those minerals that do not contain the silicon-oxygen structures that characterize silicate minerals. nonfoliated metamorphic rocks (74): ...
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Igneous rock



Igneous rock (derived from the Latin word ignis meaning fire) is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rock is formed through the cooling and solidification of magma or lava. Igneous rock may form with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks. This magma can be derived from partial melts of pre-existing rocks in either a planet's mantle or crust. Typically, the melting is caused by one or more of three processes: an increase in temperature, a decrease in pressure, or a change in composition. Over 700 types of igneous rocks have been described, most of them having formed beneath the surface of Earth's crust.
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