Nelumbo Adans Plants are one of the earliest genera and species of angiosperms. According to paleobotanists' research on fossils, about 135 million years ago, lotus plants were distributed in many water areas of the northern hemisphere. At that time, in the late period of the sharp decline of the giant reptile dinosaur, it grew on the earth much earlier than the emergence of human ancestors (2 million years ago). Former Soviet a. H. According to paleobotany (1965) by Christopher VICH, lotus fossils were found in the Cretaceous of the Amur River (Heilongjiang) in North America and Asia, and in the Oligocene and Miocene strata of Europe and East Asia (Sakhalin Island), Japan. In that month, the temperature on the earth was warmer than it is now. There were about 10 to 12 species of lotus plants, which were distributed on five continents. With the advent of the ice age, the global temperature dropped, which made many plants extinct, and some plants were forced to drift away, completely breaking the original geographical distribution. By this disaster, two species of liana survived and their distribution scope was reduced. Nelumbonucifera is distributed in the north of Asia and Oceania, and N is migrated to North America. Lutea) paleobotanists also pointed out that the Pleistocene to Holocene (2 million years ago) lotus fossils excavated in Hokkaido and Kyoto, Japan, are similar to those in modern China; the lotus leaf fossils excavated 10 million years ago in Qaidam Basin, China, are similar to those in modern China. In the 1970s, according to the book "palynology of the early Tertiary in the coastal area of Bohai Sea" published by the petroleum exploration and Development Planning Institute of the Ministry of petrochemical industry of China and Nanjing Institute of Geology and palaeontology of the Chinese Academy of Sciences, two kinds of palynological fossils of lotus were found in Panshan, Liaoning Province, Beidagang, Tianjin, Kenli, Guangrao, Shandong Province and Cangzhou, Hebei Province. The fossils of liana are also found in the strata of Changchang basin, Qiongshan, Hainan Island, China. At present, in Fuyuan, Hulin, Tongjiang, Shangzhi and other counties of Heilongjiang Province, there are still primitive wild lotus. The above shows that lotus is an ancient plant before the ice age, and it is the same as the Metasequoia glyplostroides, Ginkgobiloba, Liriodendron Chinese and Sequoia sempervirens, which are the representatives of the surviving relict plants not swallowed by the ice age glaciers.
【莲文化探秘】相关文章:
★ 初中英语作文:我爱班级活动 I Love Class Activity