The Jiufotang Formation is an Early Cretaceous geological formation in Chaoyang, Liaoning, China, part of the Jehol Group, which has yielded fossils of feathered dinosaurs, primitive birds, pterosaurs and other organisms, including remains of Microraptor and Jeholornis. It is composed mainly of mudstone with sandstone, and uranium-lead dating places its fossil-bearing layers in the Aptian stage of the Early Cretaceous, between about 124 and 121 million years ago. Its subunits include the Shangheshou and Meileyingzi beds.
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Jiufotang Formation (Wikipedia)
In Discipline: Stratigraphy, Lead paragraph
The Jiufotang Formation (Chinese: 九佛堂组; pinyin: jiǔfótáng zǔ; previously transliterated as Chiufotang Formation) is an Early Cretaceous geological formation in Chaoyang, Liaoning which has yielded fossils of feathered dinosaurs, primitive birds, pterosaurs, and other organisms (see Jehol Biota)
Caused By: Sedimentation, Lead paragraph
New uranium-lead dates reveal the formation is deposited in the Aptian stage of the Early Cretaceous
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