四川侏罗纪恐龙化石

DINOSAURIAN REMAINS FROM THE JURASSIC OF SICHUAN,CHINA

文章将四川侏罗纪恐龙划为四个相关的恐龙动物群：（１）早侏罗世禄丰龙动物群（ＬｕｆｅｎｇｏｓａｕｒｕｓＦａｕｎａ）；（２）早侏罗世资中龙动物群（ＺｉｚｈｏｎｇｏｓａｕｒｕｓＦａｕｎａ）；（３）中侏罗世蜀龙——峨眉龙动物群（Ｓｈｕｎｏｓａｕｒｕｓ－ＯｍｅｉｓａｕｒｕｓＦａｕｎａ）；（４）马门溪龙动物群（ＭａｍｅｎｃｈｉｓａｕｒｕｓＦａｕｎａ）。文章还根据动物群特征以及与国外同时代恐龙的对比，将四川盆地侏罗纪红层的时代确实为：（１）珍珠冲组和自流井组应为早侏罗世；（２）新田沟组和下沙溪庙组为中侏罗世；（３）上沙溪庙组。

Four successive and related dinosaur faunas have been divided from the Jurassic of Sichuan:(1)Early Jurassic Lufengosaurus Fauna;(2)Early Jurassic Zizhongosaurus Fauna;(3)Middle Jurassic Shunosaurus Omeisaurus Fauna;and(4)Late Jurrassic Mamenchisaurus Fauna.Comparison with fauna of the same period in other parts of the world indicates that the ages of the dinosaur bearing Jurassic red strata of Sichuan Basin are as follows:(1)The Zhenzhuchong and Ziliujing Formations are Early Jurassic;(2)The Xintiangou and Lower Shaximiao Formations are Middle Jurassic;(3)The Upper Shaximiao Formation,Suining Formation,and Penglaizhen Formation are Late Jurassic.