cretaceous stratum

• 白垩系地层

cretaceous stratum的用法和样例：

例句

1. Apatite fission track data suggest that the early Cretaceous strata in the Liupanshan basin were subjected to two burial heating events.
   磷灰石裂变径迹研究表明，六盘山盆地白垩系地层经历两次埋深加热事件。