冀北地区的中生代地层如同辽西地区相比较辽西发育更完全,分布更广泛。在这些地层中有煤及其它金属和非金属矿产资源。因此,对这些地层的研究,不仅具有地质理论意义,而且有着经济效益。冀北地区中生界的研究已有百余年的历史,但大量的系统的研究还是在1950年以后进行的,尤其六十年代以来的研究最为详细。解放前,在该区进行过地 The Mesozoic strata in northern Hebei are more developed and distributed more widely than western Liaoning. There are coal and other metals and non-metallic mineral resources in these formations. Therefore, the study of these strata not only has geological significance, but also has economic benefits. The research on Mesozoic in North Hebei Province has been more than one hundred years. However, a large amount of systematic research was conducted after 1950, especially since the 1960s. Before liberation, in the area