Late Pleistocene plant macrofossils from the Thimi Formation (Madhyapur Thimi section) of the Kathmandu Valley, central Nepal
Late Pleistocene plant macrofossils from the Thimi Formation (Madhyapur Thimi section) of the Kathmandu Valley, central Nepal
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DOI：
10.3126/jngs.v40i0.23594
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发表时间：
2010-12
期刊：
影响因子：
--
通讯作者：
S. Bhandari;K. Paudayal;A. Momohara
中科院分区：
文献类型：
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作者：
S. Bhandari;K. Paudayal;A. Momohara
本文报道了加德满都河谷提米组晚更新世植物宏体化石。根据39科71个分类单元，在巴克塔普尔Madhyapur Thimi露出的Thimi组18.5m厚的剖面上，描述了7个T-1~T-7大型植物化石组合。松属、冷杉属、铁杉属、雪松属、接骨木属、悬钩子属、尤里亚属、委陵菜属和马尾草属是蒂米组的常见成分。结果表明，冷凉温带成分(冷杉、松属、铁杉、云杉、红豆杉)占优势，暖性气候成分(栎属、欧亚属、火棘属等)占优势。在蒂米组的沉积期间。下伏的戈卡尔纳组表现为亚热带至暖温带植被，以Eurya、Ficus、Zizyphus等亚热带成分为主，而以Betula、Tsuga、Abies等温带成分为主。在提米组的沉积时期，这种亚热带-暖温带类型的植被转变为暖温带类型，并出现了大量的裸子植物和其他常绿植物。
The Late Pleistocene plant macrofossils from the Thimi Formation of the Kathmandu Valley have been reported in this paper. On the basis of 71 taxa from 39 families, seven plant macrofossil assemblages T-1 to T-7 were described from 18.5 m thick section of the Thimi Formation exposed at Madhyapur Thimi, Bhaktapur. Pinus, Abies, Tsuga, Carpinus, Sambucus, Rubus, Eurya, Potentilla and Scirpus are the common elements in the Thimi Formation. It is found that the cool temperate elements (Abies, Pinus, Tsuga, Picea, Taxus) were dominated over warm climatic elements (Quercus, Eurya, Pyracantha, etc.) during the deposition of the Thimi Formation. The underlying Gokarna Formation exhibited subtropical to warm temperate vegetation with the dominance of subtropical elements such as Eurya, Ficus, Zizyphus, etc. over temperate elements like Betula, Tsuga and Abies. During the depositional period of the Thimi Formation, this subtropical to warm temperate type of vegetation shifted to warm to cold temperate type with the abundant presence of gymnosperms and other evergreen taxa.