• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Geosciences >Multi-Stage Silicification of Pliocene Wood: Re-Examination of an 1895 Discovery from Idaho, USA
【24h】

Multi-Stage Silicification of Pliocene Wood: Re-Examination of an 1895 Discovery from Idaho, USA

机译：上新世木材的多阶段硅化作用：对来自美国爱达荷州的1895年发现物的重新检验

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The 1895 discovery of a petrified tree near Clover Creek in south-central Idaho, USA, attracted worldwide attention and resulted in the naming of a new species of ancient oak, Quercinium pliocaenicum Schuster. For more than a century, the discovery has largely been forgotten, even though specimens reside in reputable museums. Reinvestigation of the locality in 2014/2015 resulted in newly-collected specimens and a wealth of new data. Optical microscopy confirms the cellular anatomy used for the original taxonomic study. X-ray diffraction, scanning electron microscopy, energy-dispersive electron spectroscopy, Raman spectroscopy and cathodoluminescence microscopy reveal details of the mineralization, showing the presence of opal-CT as the primary component, with chalcedony as a lesser constituent. This mineralogy suggests petrifaction occurred in at least two stages, beginning with opalization of cellular tissue, leaving open vessels that became filled with chalcedony during a later mineralization episode. Clover Creek oak represents relict flora growing in a wetter climate before the uplift of the Cascade Range created a rain shadow that caused profound desertification of the inland Pacific Northwest.
机译：1895年，在美国爱达荷州中南部的四叶草溪附近发现一棵石化树，引起了全世界的关注，并命名了一种新的古栎命名为Quercinium pliocaenicum Schuster。一个多世纪以来，即使标本存放在著名的博物馆中，这一发现也基本上被遗忘了。 2014/2015年对该地区进行的重新调查产生了新收集的标本和大量新数据。光学显微镜确认了用于原始分类学研究的细胞解剖结构。 X射线衍射，扫描电子显微镜，能量分散电子光谱，拉曼光谱和阴极发光显微镜揭示了矿化的细节，表明存在蛋白石-CT作为主要成分，而玉髓为次要成分。这种矿物学特征表明，石化作用至少发生在两个阶段，首先是细胞组织的不透明化，而在随后的矿化过程中，留下了充满玉髓的开放血管。三叶草溪橡树代表了在潮湿气候下生长的残lic植物群，然后在喀斯喀特山脉的隆起造成了一个雨影，导致西北太平洋内陆地区发生了严重的沙漠化。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号