Fault-block mountains form when Earth's crust pushes material up and down near a fault line.<span> Rocks that get pushed upward eventually form mountains if there is enough seismic activity. The higher part of a fault-block area is called a horst, while the lower part is called a graben, according to Ducksters.
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differentiate and/or the embryo has doubled its size. Aging results in a gradual decline in female fertility.
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Ozone is the pollutant that forms when automobile emissions react with oxygen gas and ultraviolet light.
