Fluvial-lacustrine deposits are well preserved in the Lower Cretaceous rift basins, such as the Luanping, Sichakou-Senjitu, Qingquan, Huajiying, and Pingquan basins, in northern Hebei, North China. These non-marine strata yield abundant ostracods that serve as useful materials in the chronostratigraphic constraint and stratigraphic correlation. The ostracods of the Tuchengzi, Dabeigou, Dadianzi, Xiguayuan, and Nandian formations from northern Hebei can be divided into the Djungarica-Procyprois-Yixianella-Damonella (Tithonian–Berriasian), Luanpingella-Ocrocypris-Eoparacypris (Valanginian–lower Hauterivian), Cypridea-Timiriasevia-Daurina (upper Hauterivian), Cypridea-Limnocypridea-Lycopterocypris (Barremian–lower Aptian), and Cypridea-Clinocypris-Cyclocypris (upper Aptian) assemblage zones, respectively. This work demonstrates that ostracods are useful for biostratigraphic correlation and age determination in regional, intra-basinal lacustrine deposits. In addition, a preliminarily attempt on the correlation of the ostracod assemblage zones in northern Hebei with those in some typical contemporaneous terrestrial deposits around the world is also discussed.

河湖相沉积在河北北部、华北地区的滦平、四岔口-森吉图、清泉、华集营、平泉等下白垩统裂谷盆地保存完好。这些非海洋地层产生丰富的介形虫，可作为年代地层约束和地层对比的有用材料。河北北部土城子组、大北沟组、大​​店子组、西瓜园组、南店组介形类可分为准加里卡-普罗西普罗伊斯-义仙内拉-达蒙内拉（Tithonian-Berriasian）、滦平拉-Ocrocypris-Eoparacypris（Valanginian-lower Hauterivian）、Cypridea- Timiriasevia-Daurina (上 Hauterivian), Cypridea-Limnocypridea-Lycopterocypris (Barremian-lower Aptian), 和Cypridea-Clinocypris-Cyclocypris（上阿普蒂安）组合区，分别。这项工作表明介形虫可用于区域内陆湖沉积物的生物地层相关性和年龄确定。此外，还初步探讨了冀北介形虫组合带与世界上一些典型的同期陆相沉积物的对比。