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of the lake itself (5.6%) and agriculture (3.5%).

Geology

The fjord-like topography of the Lake Chelan valley results from repeated glacial erosion and deposition (maybe nine or ten times) during the Pleistocene Period. The last episode of glacial erosion and deposition in the basin occurred during the Last Glacial Maximum about 21,000 years ago. At that time, in the upper Similkameen River valley of British Columbia,

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