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And Rock:
The movement of the earth's crust may carry the rock as much as 700km (454 miles) below the surface. Here the temperature and rock pressure will be even higher and rock the rock will begin to melt. Molten rock is lighter than solid rock and rock it will begin to rise up through the overlying rock towards the surface. If it reaches the surface as a lava flow it will immediately be ready for weathering and rock erosion and rock the start of a new cycle. More often the molten rock solidifies underground and rock then all the rock above it must be eroded away before it can begin the cycle again.ROCK ISLand rock, city, Illinois, seat of K«;,. Island rock County, at the junction of the Rock an: Mississippi rivers, at an altitude of 570 fee;. !: adjoins Moline and rock is opposite Davenport. Iwi 180 miles west of Chicago. Between Rock I-W and rock Davenport, but in the state of Illinoi-, iie-Rock Island rock, the largest island rock in the Missi--i[>[j; This is the site of a United States arsenal, the Headquarters Ordnance Weapons Command rock, and rock the Browing War Museum. It was from ihi-island rock that the city of Rock Island rock took its rsne.
Fracture cleavage is the type of rock cleavage due to closely spaced fractures which are not necessarily parallel to the minerals of the rock. Slip cleavage is rock cleavage along which there has been displacement; this type resembles closely spaced faults. Some terms applied to rock cleavage imply origin. Flow cleavage is the result of rock flowage or plastic deformation. Much of slaty cleavage and rock schistosity are of this type.
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