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柳区砾岩是在印度和欧亚板块碰撞之后伴随造山带的后期演化所形成的一套具有重要大地构造意义的山前磨拉石建造,它对确定印度/亚洲板块碰撞时间的上限、探讨青藏高原的隆升历史具有重要意义。作者等最近在野外考察过程中在该套磨拉石的上部层位再次找到了一批植物化石,经研究鉴定约有10余种,隶属7科9属。相比前人发现,这些植物化石多是新出现的科属种,而且大多数是已经灭绝的类型,与现生种的关系较远,因此它们的发现为西藏及喜马拉雅地区的古生物及古气候环境研究提供了重要信息,是对这一地区生物化石的重要增补。文中报道这些植物化石组合及其区系特征,探讨这些化石植物组合所反映的古气候条件,并对一些主要的植物化石特征进行了比较详细的描述。
Liukuang conglomerate is a set of plinth-forming molal formed after the collision of India and Eurasia plates with the subsequent evolution of the orogenic belt. It is of great significance in determining the upper limit of the collision time in the Indian / Asian plate The uplift history of the Qinghai-Tibet Plateau is of great significance. Recently, during the field investigation, the author once again found a group of plant fossils in the upper layer of the molasse. About 10 species have been identified and studied, belonging to 7 families and 9 genera. Compared with previous discoveries, most of these plant fossils are new genera and most are extinct types, which are far away from the current species. Therefore, they were discovered as paleontology and paleoclimate in Tibet and the Himalayas Environmental research provides important information and is an important addition to the biological fossils in this area. In this paper, the flora fossil assemblages and their floristic characteristics are reported. The paleoclimatic conditions reflected by these fossil plant assemblages are discussed. Some of the major plant fossil features are described in more detail.