The variation of varve thickness may show a decrease of sediment flux during the Little Ice Age, and an increase of sediment flux after 1960s.

但纹层厚度变化可能揭示出小冰期沉积减少和个世纪六十年代之后沉积增加。

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.

第一次冰期称为「休冰期」，因其遗迹在加拿大南部休湖北方岩石中清晰可见。