Pseudoborings in petrified wood from the Yellowstone "fossil forests"
Pseudoborings in petrified wood from the Yellowstone "fossil forests"
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DOI：
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发表时间：
1984
影响因子：
1.4
通讯作者：
L. H. Fisk;W. Fritz
中科院分区：
文献类型：
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作者：
L. H. Fisk;W. Fritz
一些来自黄石公园“化石森林”的始新世硅化木材上布满了小直径的洞，以前认为是钻木昆虫挖掘出来的。这些洞只发生在木材表面附近，浅棕色细长的实心圆柱体，起初被认为是内部的碎屑填充通道。薄片分析显示，在其他硅化木材中孤立的钙化细胞群。最近方解石相对于二氧化硅的差异风化在暴露表面上产生了孔或伪钻孔。方解石被二氧化硅明显取代，精细结构保存完好，可能与第三纪气候变化和石化速率有关。
Some Eocene silicified wood from the Yellowstone "fossil forests" is riddled with small diameter holes previously presumed to have been excavated by wood-boring insects. The holes occur only near the surface of the wood with light brown elongate, solid cylinders, at first thought to be frass-filled channels, occurring in the interior. Thin section analysis reveals isolated groups of calcified cells in otherwise silicified wood. Recent differential weathering of calcite with respect to silica produced the holes or pseudoborings on exposed surfaces. The apparent replacement of calcite by silica and the excellent preservation of fine structures may bear on proposed Tertiary climatic changes and rate of petrification.