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What are the major differences between the Brazilian and U.S.systems of racial classification?
Sediment
Particles of rock, minerals, or organic materials that have been transported and deposited by water, wind, ice, or gravity.
Deposited
The process by which sediments, soil, and rocks are added to a landform or land mass, typically through the action of wind, water, or ice.
Hydrothermal Rock
Rock formed by the alteration of pre-existing rock through the action of hydrothermal fluids at high temperatures and pressures.
Magma
The molten or semi-molten natural material from which all igneous rocks are formed, found beneath the Earth's surface.
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