Crust (crust) is the outermost of the world with a thickness of approximately 60-70 kilometers away, which is a thin layer, most other leading virtual shell eggs or peel onions. Crust consists of land and water. Best crust thick crust that is the part that supports the continent with the highest mountains exist. In addition, the crust can be divided into 2 classes:
.* One layer: The stone floor, Saigon, Al (sial) is the uppermost crust contains minerals silica and aluminum Diecasting na, which is a type of granite. This layer of skin surrounding the stone sediments. Only this xylene stone floor, Al-crust that is the continent only. * The second floor: The stone floor, saima (sima) is the floor below the sedimentary recycle Al down to. Mainly basalt mineral composed of iron oxide and silica, magnesium. This stone layer saima wrapped across the surface of the Earth is in the sea and the ocean. And also the density is greater than the stones recycle Al.
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