【摘要】 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个演化阶段更多还原

【Abstract】 Based on ecostratigraphic study of one cross section of late Mesozoic in the Senjitu area of Fengning County,Northern Hebei,6 fossil insect communities are established and their environmental settings are reconstructed according to their separable and characteristic assemblage.A description are given of ecostratigraphic section and one columnar section which includs two insect communities,two interval beds and one insect assemblage bed.Ecostratigraphic subdivision revealed a general pattern of basin evolution which reappears in many other sections of Northern Hebei Province.According to the paleobiogeographic analysis,the Senjitu region belonged to temperate zone or warm climate condition and underwent four evolutionary episodes during late Mesozoic.更多还原