The first of these glacial periods is often called the Huronian glaciation because it is well exposed in rocks just north of Lake Huron in southern Canada.
第一次冰期称
「
冰期」，因其遗迹在加拿大南部湖
方的岩石中清晰可见。
The first of these glacial periods is often called the Huronian glaciation because it is well exposed in rocks just north of Lake Huron in southern Canada.
第一次冰期称「冰期」，因其遗迹在加拿大南部湖方的岩石中清晰可见。
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