Compared to supersequence boundaries, the depositional hiatus at sequence boundaries is shorter and sequence boundaries are not compatible with lithostratigraphic unit boundaries.

积序界积间断的时间相对超序界要短，岩石单位界往往不一致。

It is emphasized that the first flooding surface (FFS) is used as a standard or useful marker in optimizing chronostratigraphic and lithostratigraphic boundaries.

在年方，进一步强调以初始海泛(FFS)作为优化年“阶”的标准。