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二迭一三迭系的界线问题和接触关系,近十几年来引起了许多地质及古生物学者的注意,(如Kummel,B.1972;Kummel,B.及C.Teichert,1970;Logan,A.及L.V.Hills,1973;Nakazawa等,1970,1975;Newell,N.D.1973,1978;Stepanov,D.L.等,1969,赵金科等,1978;陈楚震,1978;廖卓庭,1979;范嘉松等,1980.)其原因有二:1.长期认为二迭系和三迭系之间有间断,是一次重要的构造运动;但由于过渡生物群的发现,需要重新探讨传统的地质观点.2.目前界线层型的建立是地层学中的主要课题,地层连续是界线层型的必要条件,所以寻找连续地层剖面成为地层学家们十分关心的问题.
The boundary problems and contact relations of the Tiaitian-Triad series have attracted the attention of many geologists and paleontologists in recent ten years (Kummel, B.1972; Kummel, B. and C. Teichert, 1970; Logan, A., And LV Hills, 1973; Nakazawa et al., 1970, 1975; Newell, ND 1973, 1978; Stepanov, DL et al., 1969, Zhao Jinke et al., 1978; Chen Chu Zhen, 1978; Liao Zhuoting, 1979; : 1. It is thought that there is a discontinuity between Permian and Triassic for a long period of time, which is an important tectonic movement. However, due to the discovery of transitional biota, traditional geological view needs to be revisited. (2) At present, As a major subject in study, stratigraphic continuity is a necessary condition for boundary stratification. Therefore, looking for continuous stratigraphic sections has become a topic of great concern to the stratigraphic scientists.