Beginning 25,000 years ago, the Bow Valley glacier ground through the region before being overtaken by a continental glacier.
从2万5千年前开始，弓河谷冰川穿过了整个峡谷，之后被大陆冰川所取代。
Beginning 25,000 years ago, the Bow Valley glacier ground through the region before being overtaken by a continental glacier.
从2万5千年前开始，弓河谷冰川穿过了整个峡谷，之后被大陆冰川所取代。
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