Tree rings and seasonal sedimentary deposits called varves can be counted to determine absolute age.
可以对树木
年轮
被称为纹泥季节性
进行计数来确定其绝对年龄。
层；年融雪（varve复数）Tree rings and seasonal sedimentary deposits called varves can be counted to determine absolute age.
可以对树木年轮被称为纹泥季节性进行计数来确定其绝对年龄。
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通量减少
世纪六十年代之后通量增加。
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