它在讨论沉积物的性质时是有用的。
Tree rings and seasonal sedimentary deposits called varves can be counted to determine absolute age.树木的年轮和季节性沉积被称为年变层,可计算用于确定绝对年龄。
From data sent back to Earth, scientists know that the rover landed on several hundred metres of sedimentary deposits that must have formed in ancient lakes.从传回地球的数据分析,科学家们了解到漫游者降落在一个几百米深的沉积堆上,而这个沉积堆一定是在一个古老的湖泊中形成的。