Article ID Journal Published Year Pages File Type
6443675 Gondwana Research 2013 8 Pages PDF
Abstract
► Volcanic ash beds are found in the basal Gufeng Formation of the Middle Permian in South China. ► Zircons from two volcanic ash beds yield precise ages of 272.0 ± 5.5 Ma and 271.5 ± 3.3 Ma. ► The age of 272 Ma may represent the first precise date for the Lower/Middle Permian boundary.
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Physical Sciences and Engineering Earth and Planetary Sciences Geology
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Precise dating of the Middle Permian: Zircon U-Pb geochronology from volcanic ash beds in the basal Gufeng Formation, Yangtze region, South China
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