Cretaceous age for the feathered dinosaurs of Liaoning, China

被引:389
作者
Swisher, CC
Wang, YQ
Wang, XL
Xu, X
Wang, Y
机构
[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
关键词
D O I
10.1038/21872
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
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 40Ar/39Ar 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.
引用
收藏
页码:58 / 61
页数:4
相关论文
共 30 条
[1]  
Chen P.-j., 1988, Acta Palaeontologica Sinica, V27, P659
[2]   An exceptionally well-preserved Theropod dinosaur from the Yixian Formation of China [J].
Chen, PJ ;
Dong, ZM ;
Zhen, SN .
NATURE, 1998, 391 (6663) :147-152
[3]  
Gradstein F.M., 1995, GEOCHRONOLOGY TIME S, V54, P95
[4]  
HAO YC, 1982, ACTA GEOL SIN-ENGL, V56, P187
[5]   Early adaptive radiation of birds: Evidence from fossils from northeastern China [J].
Hou, LH ;
Martin, LD ;
Zhou, ZH ;
Feduccia, A .
SCIENCE, 1996, 274 (5290) :1164-1167
[6]   A BEAKED BIRD FROM THE JURASSIC OF CHINA [J].
HOU, LH ;
ZHOU, ZH ;
MARTIN, LD ;
FEDUCCIA, A .
NATURE, 1995, 377 (6550) :616-618
[7]   A new symmetrodont mammal from China and its implications for mammalian evolution [J].
Hu, YM ;
Wang, YQ ;
Luo, ZX ;
Li, CK .
NATURE, 1997, 390 (6656) :137-142
[8]   Two feathered dinosaurs from northeastern China [J].
Ji, Q ;
Currie, PJ ;
Norell, MA ;
Ji, SA .
NATURE, 1998, 393 (6687) :753-761
[9]  
Ji S.A., 1997, ACT GEOL SIN, V71, P1
[10]  
Li Pexian, 1994, Acta Geologica Sinica, V68, P87