辽西地区九佛堂组及其珍稀化石层划分与对比
Division and Correlation of the Jiufotang Formation and Their Rare Fossilbearing Beds in Western Liaoning, China

摘要： 辽西地区是世界重要的化石产地，中生界下白垩统九佛堂组是该地区重要的含化石层位，含有著名的热河生物群化石。通过对辽西地区九佛堂组诸多剖面的综合研究及化石组合对比，将辽西地区九佛堂组划分为3个岩性段，并整理完善了辽西九佛堂组珍稀化石层序列。根据对辽西九佛堂组珍稀化石层进行的对比研究，建立了肖台子层、报马营子层、西营子层等3个珍稀化石层，并分析了珍稀化石层岩性特征，认为珍稀化石层的形成与火山活动存在直接关系，首次提出辽西九佛堂期存在火山活动。
Abstract: The western Liaoning region is a worldclass fossil site, in which the Jiufotang Formation is an important fossilbearing stratum, hosting the famous Jeholbiota fossils. Through comprehensive research on the many sections and fossil assemblage comparison, the Jiufotang Formation can be divided into three units, ie, the Xiaotaizi, Baomayingzi and Xiyingzi are fossilbearing sequences. The lithological characteristics of fossilbearing beds are directly related to volcanic activities, and the fossilbearing beds are always located in the top of lithologic cycle. We first propose that there were volcanic eruptions during the deposition of the Jiufotang Formation