Abstract
Most of the fossil materials documented in this book are from the Jurassic and Cretaceous of northeastern China. In this chapter, the author describes the geological and palaeobiological backgrounds in this region, which is very helpful to complete the understanding of the plant fossils to be documented in the later chapters. The Yixian Formation and Jiulongshan Formation are by far the most productive strata for early angiosperms, and, therefore, they are dealt with some details in this chapter. The geological background and age of the formations are briefly summarized. Species list and assemblages in various faunas and floras are given. For those not interested in details of the fossil floras and faunas, please feel free to skip certain sections in this chapter.
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