With the applications of analysis of variance and CSDM (Cumulative Sum of Deviation from Mean diameter) curve, Permian fossil woods recently found in Hulusitai colliery of Inner Mongolia are analysed and studied systematically.
应用方差分析、CSDM曲线相关分析(采用频率分布原理)等方法和原理，对鄂尔多斯盆地呼鲁斯台煤矿二叠纪地层中新近发现的木化石标本进行了系统的鉴定和研究。
参考来源 - 内蒙古呼鲁斯台中二叠世木化石及古生态研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Fossil woods with distinct growth ring show that the climate has seasonal change obviously during that time.
化石木清晰的生长轮表明当时气候具明显的季节性。
The secondary xylem of the original plants in local acidic environment was replaced by silica and turned into fossil woods.
处在酸性垒的原植物次生木质部组织被二氧化硅替换而成硅化木。
October 17, 2008—Fossil hunters searching woods behind a suburban shopping mall have scored a basement bargain: a piece of rock with the oldest known impression of a flying insect (above).
马萨诸塞州的化石搜集团队，在城郊商场后面的树林里搜寻的时候，发现了这块印有古老昆虫足迹的化石。 按专家的说法，这好比“中了彩票大奖”。
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