Sandstone changes to quartzite under intense heat and pressure.what type of rock is quartzite?give a to support your answer
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metamorphism
Quartzite is a nonfoliated metamorphic rock composed almost entirely of quartz. It forms when a quartz-rich sandstone is altered by the heat, pressure, and chemical activity of metamorphism. These conditions recrystallize the sand grains and the silica cement that binds them together.
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metamorphic rocks....or metaphorism
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