He placed the Jurassic - Cretaceous Boundary between the Yixian Formation and the Jiufotang Formation.

他根据多年的研究,将侏罗 - 白垩系界线置于义县组与九佛堂组之间.

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Description: The Yixian formation of China contains a panoply of exquisitely - preserved insects, vertebrates, and plants.

描述: 中国的义县组产出的化石种类精美绝伦,种类繁多,昆虫 、 脊椎动物, 还有植物.

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