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Sharp, rocky crest of the Sierra Nevada.  

Did You Know?
The Sierra Nevada is still growing today. The mountains gain height during earthquakes on the east side of the range. But the mountains are being shortened by erosion almost as quickly as they grow. This erosion has deposited sediments thousands of feet thick on the floor of the San Joaquin Valley.

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Last Updated: July 25, 2006 at 00:22 EST