【摘 要】
：
西藏南部地区是我国海相白垩系—下第三系发育最好的地区之一，对这套地层的生物相和遗迹相研究，有助于了解印度板块和欧亚板块碰撞前这一地史时期该地区的沉积环境和古地理面貌
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西藏南部地区是我国海相白垩系—下第三系发育最好的地区之一，对这套地层的生物相和遗迹相研究，有助于了解印度板块和欧亚板块碰撞前这一地史时期该地区的沉积环境和古地理面貌。文章描述了５个生物相组合包括２４个主要的生物相类型和４种主要的遗迹相（Ｎｅｒｅｉｔｅｓ，Ｚｏｏｐｈｙｃｏｓ，Ｃｒｕｚｉａｎａ和Ｓｋｏｌｉｔｈｏｓ遗迹相），其中Ｚｏｏｐｈｙｃｏｓ遗迹相进一步划分出Ｔｈａｌａｓｓｉｎｏｉｄｅｓ－Ｐｌａｎｏｌｉｔｅｓ遗迹亚相和Ｚｏｏｐｈｙｃｏｓ－Ｃｈｏｎｄｒｉｔｅｓ遗迹亚相，它们在剖面中交替出现，与原始沉积环境的含氧条件变化有关。
The southern Tibet is one of the most developed regions of the Cretaceous-Lower Tertiary in China. The study on the biofacies and relics in this stratum will help to understand the history of the Indian Plate before the Eurasian Plate collision Sedimentary environment and paleogeography of the area during the period. The paper describes a combination of five biological facies including 24 major biofacies and 4 major facies facies (Nereites, Zoophycos, Cruziana and Skolithos facies), in which the Zoophycos facies further divides Thalassinoides-Planolites rude facies and Zoophycos - Chondrites rude subfacies, which alternate in the profile, are related to changes in the oxygen content of the original sedimentary environment.
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