Determining absolute ages cannot be done from orbit;instead rock samples from these areas must be sent to Earth for detailed analysis or examined by future rovers that can perform radioisotope dating.

• 轨道卫星无法估计绝对年代，因此必须将这些地区的岩石样本送回地球做详细的分析，或者要等待未来，把可以做放射性同位素定年的探测车送上火星去做调查。