Okanagan Valley

OKANAGAN VALLEY is a broad U-shaped trough in south-central BC occupied by a chain of lakes that drain south via the Okanagan R to Osoyoos Lk. The lakes, including Swan, OKANAGAN, KALAMALKA, Wood, Duck, SKAHA, VASEUX and Osoyoos, are remnants of a glacial sea—Penticton Lake—that inundated the area some 10,000 years ago (see GLACIATION); the largest is Okanagan Lk. Alluvial deposits left behind when the glaciers retreated are the basis of the valley's bountiful agricultural production today....

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