geologic age

• 地质代[期]

geologic age的用法和样例：

例句

1. A remnant or trace of an organism of a past geologic age, such as a skeleton or leaf imprint, embedded and preserved in the earth's crust.
   化石埋置并保存于地层中的古生物遗体、遗物和其生活遗址，如骨骸、叶子的印痕等