年轮

1.Tree rings and seasonal sedimentary deposits called varves can be counted to determine absolute age.

可对树木的年和被称为纹泥的季节性沉积物进行计定其绝对年龄。

2.Dendrochronology A method of archaeological dating by the ANNUAL RINGS of tree, used when the lifespans of living and fossil trees in an area overlap.

在一定的区域内当生活树木及化石树木的寿命有重叠时，通过树木的年测考古学年代的方法。