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[pct-l] the high sierras: how did they get so high?



Borrowing a nautical metaphor to explain the process, Colorado
geophysicist Craig Jones said it was as if "all the ballast in a
submarine were dumped into the water, and the sub rose higher and
higher above the surface."

http://www.sfgate.com/cgi-bin/article.cgi?file=/chronicle/archive/2004/07/30/MNGOF7VRP01.DTL