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首页> 外文期刊>Journal of African Earth Sciences >Wood remains from the Late Triassic (Carnian) of Jordan and their paleoenvironmental implications
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Wood remains from the Late Triassic (Carnian) of Jordan and their paleoenvironmental implications

机译：约旦晚期三叠纪（卡纳期）的木材遗迹及其古环境意义

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摘要

During field work in the Triassic of Jordan fossil wood remains have been discovered at five horizons (S-1AR-S-5AR) of the Late Triassic (Carnian) Abu Ruweis Formation in NW Jordan. In most horizons wood remains are too badly preserved to allow for a detailed xylotomic investigation. Only two horizons provided material which exhibited anatomical details: (1) in horizon S-1AR we found rare and rather small fragments of woody charcoal exhibiting cellular details (representing the first macroscopic evidence of paleo-wildfires from the Late Triassic of the Middle East), and (2) in horizon S-5AR surfaces of partly compressed (gagatized) and partly permineralized wood fragments exhibited anatomical details that could be investigated by means of scanning electron microscopy. All wood remains that allow for a detailed investigation show features typical of gymnosperms, but at the moment nothing can be said about a more specific taxonomic affinity of most of the woods, although wood from horizon S-5AR exhibits characteristics of protopinoid wood. Our data provide evidence that gymnospermous woody vegetation cover has existed in the source areas of the sediments deposited in the Abu Ruweis Formation in Jordan and that this woody vegetation occasionally experienced wildfires. This, together with lithological data, provides evidence for a seasonally dry (maybe even arid) climate during deposition of the Abu Ruweis Formation. On a larger scale our findings contribute to the very scarce current knowledge about Late Triassic wildfires on the entire continent Gondwana, from where so far only three records of macro-charcoals, as undisputed evidence of paleo-wildfires, have been published from this period.
机译：在约旦三叠纪的野外工作期间，已在约旦西北部的三叠纪晚期（卡纳期）阿布鲁威斯地层的五个层位（S-1AR-S-5AR）发现了化石遗迹。在大多数视野中，木材残骸保存得太差，无法进行详细的木序研究。只有两个视野提供了显示解剖学细节的材料：（1）在视野S-1AR中，我们发现了罕见且相当小的木炭碎片，呈现出细胞细节（代表了中东三叠纪晚期古火的第一个宏观证据） （2）在水平S-5AR表面中，部分压缩（粘合）和部分矿化的木材碎片表现出解剖学细节，可以通过扫描电子显微镜进行研究。所有允许进行详细调查的木材遗骸都显示了裸子植物的典型特征，但目前，尽管地平线S-5AR的木材表现出类胡萝卜素的特征，但大多数木材的分类学亲和力尚无定论。我们的数据提供了证据，证明约旦阿布鲁威斯组沉积物的源区存在裸子植物木本植物覆盖物，并且这种木本植物偶有野火。这与岩性数据一起，为阿布·鲁威斯组沉积期间的季节性干燥（甚至干旱）气候提供了证据。从更大的范围来看，我们的发现促成了目前对整个冈瓦纳大陆上晚三叠世野火的非常了解，到目前为止，从这一时期到现在为止，只有三笔大型木炭记录作为古野火的无可争议的证据得以发表。

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  • 来源
    《Journal of African Earth Sciences》 |2014年第7期|168-174|共7页
  • 作者

    Abdalla M.B. Abu Hamad; Andre Jasper; Dieter Uhl;

  • 作者单位

    Department of Applied and Environmental Geology, The University of Jordan, Amman 11942, Jordan;

    Programa de Pos-Graduacao em Ambiente e Desenvolvimento da UNIVATES (PPGAD/UNIVATES), Centro Universitario Univates, Rua Avelino Tallini, 171 - CEP 95.900-000, Lajeado, RS, Brazil;

    Senckenberg Forschungsinstitut und Naturmuseum, Senckenberganlage 25, 60325 Frankfurt am Main, Germany,Senckenberg Center for Human Evolution and Palaeoenvironment, Institut fuer Geowissenschaften, Universitaet Tuebingen, Sigwartstrasse 10, 72076 Tuebingen, Germany;

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  • 正文语种 eng
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  • 关键词

    Triassic; Carnian; Jordan; Fossil wood; Charcoal; Paleo-wildfire;

    机译：三叠纪;狂欢节约旦;化石木;木炭;古野火;

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