【摘要】 在雅江县雅江—道孚公路边的上三叠统雅江组—两河口组地层剖面上,首次发现了Protopaleodictyon,Phycosiphon,Planolites,Phycodes,Paleodictyon,Squamodictyon,Urohelminthoida,Lophoctenium,Ovatiichnum等9个遗迹属,共15个遗迹种,归属于Nereites遗迹相。遗迹化石及遗迹相特征反映该区上三叠统雅江组和两河口组的沉积环境为次深海—深海的大陆斜坡中下部—深海盆地边缘。更多还原

【Abstract】 Trace fossils have been first discovered in Late Triassic Yajiang Formation and Lianghekou Formation in Yajiang County, Sichuan. After determination, these trace fossils have been classified into 9 ichnogenera and 15 ichnospecies. Based on detailed study it, all these belong to Nereites ichnofacies. In term of trace fossils, it is suggested that the Late Triassic depositional environment in the area experienced the evolution from the middle-lower slope to abyssal basin margins.更多还原