It is a heteropic product synchronous with the Heishidu Formation and deposited in the early Cretaceous.

与黑石渡组为同期异相产物，属于早白垩世沉积。

youdao

It is a heteropic product synchronous with the Heishidu Formation and deposited in the early Cretaceous.

与黑石渡组为同期异相产物，属于早白垩世沉积。

youdao