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首页> 外文学位 >Application of integrated high-resolution biochemostratigraphy to Paleozoic chronostratigraphic correlation: Recalibrating the Silurian system .
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Application of integrated high-resolution biochemostratigraphy to Paleozoic chronostratigraphic correlation: Recalibrating the Silurian system .

机译：集成高分辨率生物化学地层学在古生代地层对比中的应用：重新校准志留系。

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摘要

The stratigraphic record preserves a library of global climate change that allows us to use the past as the key to the present by studying prior examples of the multiple climate states of our planet's history. The cause and affect relationships within the global climate system as well as the triggers and eventual consequences of prior examples of global environmental change are all preserved in the rock record. This global library is well-utilized for records from the recent past but there is diminishing attendance as one moves to the parts of the library containing older and older global environmental records. This is largely due to the difficulty in obtaining, reading, interpreting, and correlating global environmental records from the distant past.The work presented here is from the Silurian Period, including an interval from roughly 440 to 423Ma (Millions of years ago), and demonstrates that it is possible to produce a timescale for an interval hundreds of millions of years ago that nearly matches the resolution of more recent time periods. By producing a Phanerozoic timescale of equal resolution and fidelity throughout, over 500 million years of global environmental history can be brought to bear on our understanding of the modern climate system. Such a goal is decades away however, but this dissertation has begun to show that, at least for some portions of the Silurian, global chronostratigraphic correlation on the order of thousands of years (kyr) is achievable.The integration of high-resolution (often cm-scale) carbonate carbon isotope (delta13Ccarb) chemostratigraphy with high-resolution biostratigraphy of conodonts and graptolites as a chronostratigraphic tool, 'biochemostratigraphy', is documented in detail throughout this work which is presented in three parts. The document is divided into sections dealing with the chronostratigraphic potential, the practical application, and the chronostratigraphic consequences of integrated high-resolution biochemostratigraphy. Biochemostratigraphic data from Ohio, Indiana, Kentucky, Tennessee, New York, Nevada, Sweden, the United Kingdom, Estonia, and Latvia are presented including an interval from the Aeronian Stage of the Llandovery Series to the Homerian Stage of the Wenlock Series. New chronostratigraphic charts for the Silurian are provided including the first portion of an orbitally-tuned Silurian timescale as well as potential revisions to Silurian lithostratigraphic terms in use in the American Midcontinent.
机译：地层记录保留了全球气候变化的资料库，通过研究地球历史上多种气候状态的先前例子，我们可以将过去作为现在的关键。全球气候系统内的因果关系以及先前全球环境变化的触发因素和最终后果都保存在岩石记录中。这个全球图书馆被很好地利用来记录最近的记录，但是随着人们转移到包含越来越老的全球环境记录的图书馆部分，出席人数正在减少。这主要是由于难以获得，阅读，解释和关联远古时代的全球环境记录所致，这里的工作是志留纪时期的，包括大约440Ma至423Ma（数百万年前）之间的间隔，以及证明有可能产生几亿年前的时间尺度，该时间尺度几乎与最近时间周期的分辨率相匹配。通过产生始终具有同等分辨率和保真度的生代时间尺度，可以使我们对现代气候系统的理解超过5亿年的全球环境历史。然而，这一目标还需要数十年的时间，但是本文已经开始表明，至少对于志留纪的某些部分而言，全球年代地层相关性可以达到数千年（kyr）的数量级。厘米级的碳酸盐碳同位素（delta13Ccarb）化学地层学，以及牙形石和石墨石的高分辨率生物地层学，作为年代地层工具“生物化学地层学”，在整个研究过程中都有详细记录，共分三部分。该文档分为几个部分，分别涉及年代地层潜力，实际应用以及集成高分辨率生物化学地层学的年代地层后果。列出了俄亥俄州，印第安纳州，肯塔基州，田纳西州，纽约州，内华达州，瑞典，英国，爱沙尼亚和拉脱维亚的生物化学地层学数据，包括从兰迪奥伊系列的Aeronian阶段到温洛克系列的Homerian阶段的时间间隔。提供了志留纪的新年代地层图，包括轨道调整的志留纪时标的第一部分，以及在美国中部大陆使用的志留纪地层学术语的潜在修订。

著录项

  • 作者

    Cramer, Bradley Douglas.;

  • 作者单位

    The Ohio State University.;

  • 授予单位 The Ohio State University.;
  • 学科 Geology.Geochemistry.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 307 p.
  • 总页数 307
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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