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在对河北丰宁森吉图地区一条中生代晚期地质剖面进行生态地层研究的基础上，建立了６个昆虫化石群落，恢复了它们所代表的环境，并对相应的生态地层剖面进行了描述，作出了生态地层柱状图。该生态地层剖面由２个昆虫群落带、２个间隔带和１个昆虫化石组合层构成。生态地层划分的结果显示了中生代晚期在冀北许多地区具有代表性的盆地演变的一般模式。古地理分析表明森吉图地区在中生代晚期温暖的气候条件下共经历了４个演化阶段
Based on the ecological stratigraphic study of a late Mesozoic geological section in the Seongnam region in Fengning, Hebei Province, six insect fossil communities were established, the environment they represented was restored, and the corresponding ecological stratum profile was described. Ecological stratum histogram. The ecological stratum profile is composed of two insect community belts, two interval belts and one insect fossil assemblage. The results of the ecological stratigraphic division show the typical pattern of basin evolution in many areas of northern Hebei during the late Mesozoic. Paleogeographical analysis shows that the Senkitu area underwent four stages of evolution under the warm climatic conditions in the late Mesozoic