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首页> 外文期刊>Ichnos: an international journal for plant and animal traces >The Glossifungites Ichnofacies and Sequence Stratigraphic Analysis: A Case Study from Middle to Upper Eocene Successions in Fayum, Egypt
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The Glossifungites Ichnofacies and Sequence Stratigraphic Analysis: A Case Study from Middle to Upper Eocene Successions in Fayum, Egypt

机译：光泽真菌岩相和层序地层学分析：以埃及法尤姆中新世至上始新世演替为例

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摘要

The Glossifungites Ichnofacies was erected by Dolf Seilacher (the father of modern ichnology) in the mid-nineteen sixties to encompass burrows excavated into firm or compacted substrates. Correspondingly, this firmground ichnofacies has been used extensively in the identification of omission surfaces and the identification and interpretation of sequence stratigraphic discontinuities. A case study from Eocene strata in the Fayum depression of Egypt presents an opportunity to showcase a genetic approach for classifying occurrences of the Glossifungites Ichnofacies. More than twenty-five Glossifungites Ichnofacies-demarcated surfaces are documented and examined in this study. Based on the origin and character of these discontinuities, the examined surfaces are grouped into two main types: those of autogenic origin and those of allogenic derivation. The allogenically generated expressions of the Glossifungites Ichnofacies are associated with key-stratigraphic discontinuities of sequence stratigraphic significance and are the most common in the Eocene succession. Such surfaces are attributed, herein, to transgressively modified sequence-bounding discontinuities (FS/SU), systems tract-bounding surfaces (maximum flooding surfaces, MFS, and transgressive surfaces, TS), and finally parasequence-bounding surfaces (flooding surfaces, FS). These Glossifungites Ichnofacies-demarcated surfaces have proven to be crucial in the sequence stratigraphic interpretation of the middle to upper Eocene succession in the Fayum depression.
机译：格洛芬奇岩技术是在19世纪60年代中期由Dolf Seilacher（现代鱼类学之父）架设的，涵盖了挖掘成坚固或压实基质的洞穴。相应地，这种牢固的岩相已广泛用于遗漏面的识别以及层序地层不连续性的识别和解释。一项来自埃及Fayum凹陷的始新世地层的案例研究提供了展示遗传方法以对Gungifungites细晶岩相进行分类的机会。在这项研究中，已记录和检查了超过25个按面相划分的坡铁矿。根据这些不连续性的起源和特征，将检查的表面分为两种主要类型：自生起源的表面和异源衍生的表面。异辉石岩相的异源生成表达与层序地层意义的关键地层不连续有关，并且在始新世演替中最为常见。这些表面在此归因于海侵性修饰的序列边界不连续性（FS / SU），系统束边界表面（最大泛洪表面MFS和海侵表面TS），最后是副序列边界表面（泛洪表面FS） ）。事实证明，这些由辉石岩特征相划定的表面对于Fayum凹陷中始新世中上层序的层序地层解释至关重要。

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