贝里亚期(Berriasian)是白垩纪第一个时期，时间为145.5 ± 4.0 百万年前至 140.2 ± 3.0 百万年前。接续侏罗纪的提通期之后，凡蓝今期之前。

In the geological timescale, the Berriasian is an age or stage of the Early Cretaceous. It is the oldest, or lowest, subdivision in the entire Cretaceous. It spanned the time between 145.0 ± 4.0 Ma and 139.8 ± 3.0 Ma (million years ago). The Berriasian succeeds the Tithonian (part of the Jurassic) and precedes the Valanginian.