论文部分内容阅读
1988年夏,笔者参加了“亚东-格尔木岩石圈 GGT 断面综合研究”项目的野外地质考察。考察期间,在拉萨北澎波农场牛马沟下白垩统塔克那组发现了丰富的遗迹化石。经研究,其中有一新遗迹属种——Gastropodichnus taknaensis(ichnogen.et ichnosp. nov.),其保存于灰绿色泥质粉砂岩层面上。目前这类遗迹一般被认为是腹足类在海底活动时遗留的。依据塔克那组所产的有孔虫、菊石、双壳类和腹足类等化石,遗迹化石的地质时代应属于早白垩世晚期(Aptian-Albian)。共同参加野外工作的有刘训和傅德荣。陈殿丰摄制图片,在此一并表示感谢。
The summer of 1988, I participated in the “East Asia - Golmud lithospheric GGT section comprehensive study ” field geology investigation. During the investigation, abundant trace fossils were found in the Lower Cretaceous Taknara Formation in Niumangou, northern Pengpu, Lhasa. After research, there is a new relic genus - Assasodichnus taknaensis (ichnogen.et ichnosp. Nov.), Which is stored in the gray-green muddy siltstone layer. Currently, such relics are generally considered to be left behind by gastropods during the seabed activities. Based on the fossils of foraminiferal, ammonite, bivalve and gastropod produced by Tackana Formation, the geological age of trace fossils belongs to the late Aptian-Albian period. Liu Xun and Fu Derong joined the field work together. Chen Dianfeng filming pictures, in this together to express my gratitude.