Cretaceous age for the feathered dinosaurs of Liaoning, China

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	Cretaceous age for the feathered dinosaurs of Liaoning, China
	Swisher, CC ; Wang, YQ ; Wang, XL ; Xu, X ; Wang, Y
	1999-07-01
发表期刊	NATURE
卷号	400 期号:6739 页码:58-61
文章类型	Article
摘要	The ancient lake beds of the lower part of the Yixian Formation, Liaoning Province, northeastern China, have yielded a wide range of well-preserved fossils: the 'feathered' dinosaurs Sinosauropteryx(1), Protarchaeopteryx and Caudipteryx(2), the primitive birds Confuciusornis(3) and Liaoningornis(4), the mammal Zhangheotherium(5) and the reportedly oldest flowering plant, Archaefructus(6). Equally well preserved in the lake beds are a wide range of fossil plants, insects, bivalves, conchostracans, ostracods, gastropods, fish, salamanders, turtles, lizards, the frog Callobatrachus(7) and the pterosaur Eosipterus(1,8). This uniquely preserved assemblage of fossils is providing new insight into long-lived controversies over bird-dinosaur relationships(1,2), the early diversification of birds(3,9,10) and the origin and evolution of flowering plants(6). Despite the importance of this fossil assemblage, estimates of its geological age have varied widely from the Late Jurassic to the Early Cretaceous. Here we present the first Ar-40/Ar-39 dates unambiguously associated with the main fossil horizons of the lower part of the Yixian Formation, and thus, for the first time, provide accurate age calibration of this important fauna. The results of this dating study indicate that the lower Yixian fossil horizons are not Jurassic but rather are at least 20 Myr younger, placing them within middle Early Cretaceous time.
WOS标题词	Science & Technology
关键词[WOS]	NORTHEAST CHINA ; JURASSIC ANGIOSPERM ; INTERCALIBRATION ; EVOLUTION ; STANDARDS ; FLOWER
收录类别	SCI
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000081255700048
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/2063
专题	古低等脊椎动物研究室
作者单位	1.Berkeley Geochronol Ctr, Berkeley, CA 94709 USA 2.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China 3.Changchun Univ Sci & Technol, Nat Hist Museum, Changchun 130026, Peoples R China
推荐引用方式 GB/T 7714	Swisher, CC,Wang, YQ,Wang, XL,et al. Cretaceous age for the feathered dinosaurs of Liaoning, China[J]. NATURE,1999,400(6739):58-61.
APA	Swisher, CC,Wang, YQ,Wang, XL,Xu, X,&Wang, Y.(1999).Cretaceous age for the feathered dinosaurs of Liaoning, China.NATURE,400(6739),58-61.
MLA	Swisher, CC,et al."Cretaceous age for the feathered dinosaurs of Liaoning, China".NATURE 400.6739(1999):58-61.

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