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To: Raymond Duray who wrote (19989)6/18/2002 11:28:56 PM
From: smolejv@gmx.net  Read Replies (1) | Respond to of 74559
 
>>Placer mining was so destructive in the dry land operations of the Mother Lode in California in the 1880's that a portion of the channel of the Sacramento River was permanently raised by about 20 feet. The Yuba was raised for a time by 60 feet! <<

It's called tertiary erosion. And in places (big places) twas actually quarternary erosion.