Misc
Lashawone Powell
October 6, 2005
SCI 2144
The three major types of rocks, igneous, sedimentary, and metamorphic rocks are interrelated by a series of natural processes. Igneous rocks form from the cooling and crystallization of hot molten lava and magma. Igneous rocks undergo weathering and erosion to form sediments. Igneous rock can form from magma being brought to the surface by volcanic eruption or it can form beneath the surface. Sediments are deposited and lithified by compaction and cementation to form sedimentary rocks. Unconsolidated sediment is the precursor of sedimentary rock. Sedimentary rock becomes buried by additional sedimentary deposition, and when they are deep within the Earth, they are subjected to heat and pressure which causes them to become metamorphic rocks. With further burial and heating, the metamorphic rocks begin to melt. When heat and pressure below the Earth's surface become high enough, metamorphic rock is formed. Partially molten metamorphic......
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Approximate Word Count: 346
Approximate Pages: 2 (250 words per double-spaced page)
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