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窝木Bothrodendron是欧美石炭纪重要的化石之一。我国仅青海欧龙布鲁克和内蒙大青山两地发现。在韩城采得此类化石,具有一定意义。本文标本暂定为顾氏窝木(亲近种)Bothrodendron aff.Kuianum Lee, 就其主要特点和已报导的各种窝木,基本相似,但又都不相同。只是和李星教授建立的顾氏窝木Bothrodendendron kuianum Lee十分接近。然叶痕形态及三小点形状和排列之不同,只好定为它的亲近种。本文标本采自陕西韩城县桑坪矿区山西组底砂岩之上的泥岩夹层内。陕西渭北地区已有大量资料证明,此层底砂岩是位于“东大窑灰岩”海相层位之上的,与山西标准剖面对比也应为山西组。其中发现窝木化石,说明山西组时代是可能属于晚石炭世的。
Bothrodendron is one of the most important fossils in the Carboniferous in Europe and the United States. Only Qinghai Oolong Bruker and Daqing Mountain in Inner Mongolia were found in our country. Mining such a fossil in Hancheng has a certain meaning. This specimen is tentatively referred to as Bothrodendron aff. Kuianum Lee, whose main features are similar to those reported for various nestwoods, but are all different. It is only close to Bothrodendendron kuianum Lee, established by Prof. Li Xing. However, the shape of the leaf mark and the shape and arrangement of the three small dots differ only because of its close proximity. The specimen is collected from the mudstone intercalation over the bottom sandstone of Shanxi Formation in the Sanping mining area, Hancheng County, Shaanxi Province. Weibei area in Shaanxi Province has a lot of data to prove that this layer of sandstone is located in the “Dongda Kiln limestone” above the sea level, compared with the Shanxi standard profile should also be Shanxi group. Among them, the fossil wood was found, indicating that the Shanxi Formation was probably belonging to the Late Carboniferous.