摘要
本文简述了西藏阿里地区中侏罗—早白垩世遗迹化石的产地地层;复理石相遗迹化石的形态特征及分类;并描述遗迹化石16个遗迹属17个遗迹种,其中3个新遗迹属和6个新遗迹种。文中所研究的遗迹化石是1980年高原地质研究所地质调查大队四分队采集的。在研究过程中曾得到杨遵仪教授热心指导。照片由王树元、孙特和胡昌铭摄。在此一并致谢。
The middle Jurassic to lower Cretaceous flysch trace fossils described herein were first found in Shiquianhe—Duoma,Ngari region of northwest Tibet(E79°—81°,N32°—34°).The contain 16 ichnogenera,17 ichnospecies of which 3 ichnogenera and 6 ichnospecies are new.The trace fossils found from Duoma group(middle Jurassic)include:Planolites sp.,Parahelicorhaphe bangonghuensis n.ichnogen,et ichnosp.,Megagrapton sp.,Lorenzinia rituensis n.ichnosp.,Pelecypodichnus sp.,The trace fossils from Rutog formation(lower Cretaceous)are characterized by containing Helicoichnus cylindricum n.ichnogen,et ichnosp.,Rituichnus elongatum n.ichnogen,et ichnosp.,Granularia of.lumbricoides(Heer),Ophiomorpha of.nodosa Lundgren,Helminthopsis sp.,Neonereites uniserialis Seilacher,Helicolithus tibetensis n.ichnosp.,Urohelminthoida sp.Protopaleodictyon incompositum Ksiazkiewicz,Paleodictyon regulate Sacco,P.(Glanodictyon)minimum(Sacco),Astropolithon tibeta n,ichnosp.The trace fossils listed above are closely related to the Cretaceous and Eocene flysch trace fossil assemblages of north Spain Pyrenees and Polish Karpathians(T.P.Crimes 1977,Ksiazkiewicz M.1977)
作者
杨式溥
宋志敏
梁定益
Yang Shipu;Song Zhimin;Liang Dingyi
出处
《地质学报》
1982年第4期302-314,383-384,共15页
Acta Geologica Sinica
