earlier Cretaceous period

• 早白垩世

earlier Cretaceous period的用法和样例：

例句

1. The third period is the Jiamuhe group overmature dry gas in the late Jurassic Period to the early Cretaceous.
   第三期是佳木河组过成熟干气，成藏期在侏罗纪到早白垩世。
2. The fourth occurred at the end of the Early Cretaceous, showing titling with weak faulting and folding.
   其四发生在早白垩世末期，表现为掀斜运动，褶皱和断裂作用相对较弱。