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分析了西西伯利亚东南地区的下凡兰吟阶的两个剖面的陆相孢粉型化石的分布。依据西伯利亚北部已经定年的剖面中动物群建立起来的孢粉组合的对比,确定了孢粉标志层的定义,并与北方区的菊石带相对应的孢粉组合进行了对比。这一工作为早凡兰吟期与气候变化息息相关的植被和景观的短期变化以及周边古盆地变迁的重建,提供了地层依据。欧亚大陆中部和东部地区凡兰吟期孢粉组合的横向对比显示:西西伯利亚东南地区的植被具有印度欧洲和西伯利亚加拿大两大古植物地理区的过渡性质,显有这两区的典型特征。
The distribution of terrestrial sporo-pollen fossils in two sections of the Xia Van Lang step in southeastern Western Siberia was analyzed. Based on the comparison of sporopollen assemblages established by the fauna in the dated Siberian profile, the definition of sporopollen signage was established and compared with the sporopollen assemblage corresponding to the ammonification zone in the northern region. This work provides a basis for stratigraphy for the short-term changes of vegetation and landscape that are closely related to climate change during the Landing period and the reconstruction of the vicissitudes of the surrounding ancient basins. Lateral comparisons of spongiam assemblages in the middle and eastern parts of Eurasia show that the southeastern West Siberia is characterized by the transitional nature of the two ancient plant geographic areas of India and Siberia and Canada.