A new martian crater chronology

Crater chronologies are a fundamental tool to assess the relative and absolute ages of planetary surfaces when direct radiometric dating is not available. Martian crater...撞击坑年代学（Crater chronologies）是在无法直接开展放射性同位素测年时，用于评估行星表面相对与绝对年龄的基础性工具。火星撞击坑……