martes, 19 de octubre de 2010

Summary #1 Building up and and Breaking down

HOW IS A MOUNTAIN MADE

All begins in the rock of the crust, when it move up,down or by the sideways.Rocks can also bent,squeeze,twisted or broken.These changes can cause different types of features to be made.

The most common type of mountain is the fold mountain, that mostly is formed by layers of rocks that had been squeezed together.Another type of mountain is the fault-block mountain.A fault-block mountain is made by huge tilted blocks of rocks separated from surrounding rock by faults.A fault is a large crack in rocks along which there is movement.Another landform created by crustal movement is a plateau.A plateau is a large area of flat land at a high elevation, like the grand canyon.

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