摘要
文中详细描述四川广安谢家槽剖面早三叠世地层中17个遗迹化石属,它们是:Arenicolites,Bifungites,Chondrites,Didymaulichnus,Isopodichnus,?Monocraterion,Palaeophycus,Phycodes,Planolites,Psammichnites,Skolithos,Taenidium,Teichichnus,Thalassinoides,Treptichnus,Uchirites和星状遗迹化石,它们可归属于Cruziana遗迹相。在风暴沉积中,Skolithos出现在主要的风暴沉积层,而Planolites和Palaeophycus常常出现在风暴序列的消减沉积层中。机会的遗迹化石如Treptichnus富集在纹层状灰岩中,指示一种贫氧的沉积环境。文中还探讨了遗迹化石在地层中的时空分布特点与P/Tr生物大灭绝后早三叠世海洋生物复苏的关系。
17 ichnogenera are described as Arenicolites, Bifungites, Chondrites, Didymaulichnus, Isopodichnus, ？ Monocraterion, Palaeophycus, Phycodes, Planolites, Psammichnites, Skolithos, Taenidium, Teichichnus, Thalassinoides, Treptichnus, Uchirites and Star-like trace fossils. They are assigned to the Cruziana ichnofacies reflecting shallow water environments with soft substrates.Some special taxa are known to have occurred in the storm-generated sediments. Skolithos are mainly yielded from the storm layers and Planol- ites and Palaeophycus from warning storm deposition layers respectively. The opportunistic taxa such as Chondrtes, Treptichnus gathering in stripped limestones are indicative to dysaerobic environments. This paper also probes into the relationship between the spatial and anachronistic distribution of the trace fossils in the Early Triassic and ocean biotic recovery after the Permian/Trias-sic mass extinction.
出处
《古生物学报》
CAS
CSCD
北大核心
2014年第1期52-69,共18页
Acta Palaeontologica Sinica
基金
中国科学院战略性先导科技专项(B类)(No.XDB03010102)
国家自然科学基金(41072008
41172010
41272014)
中国科学院"外国专家特聘研究员"计划项目(项目编号:2009Z2-7)联合资助
关键词
遗迹化石
遗迹相
生物复苏
早三叠世
四川广安谢家槽
Trace fossils, ichnofacies, biotic recovery, Early Triassic, Xiejiacao, Guang＇an of Sichuan
