Stratigraphic ranking of selected invertebrate fossils: A quantitative approach at different temporal and geographic scales
Stratigraphic ranking of selected invertebrate fossils: A quantitative approach at different temporal and geographic scales
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DOI：
10.26879/912
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发表时间：
2019-08
影响因子：
2
通讯作者：
A. Abdelhady;Barbara Seuss;Hatem F. Hassan
中科院分区：
文献类型：
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作者：
A. Abdelhady;Barbara Seuss;Hatem F. Hassan
几十年来，化石组一直被用于岩石的生物年代测定。本文提出了一种定量的方法来评价和比较所选分类群作为生物地层标志的质量。根据菊石类、双壳类、浮游和底栖有孔虫的种类分布，对其进行了定量排序。将发生数据（物种持续时间、地理范围）的时空分析整合到单一关联方法的结果中，该方法除了生成多个ua外，还测量了叠加矛盾。结果表明，侏罗纪菊石的物种持续时间最短，大多数物种局限于单一的ua带。此外，菊石具有最少数量的矛盾生物事件。然而，浮游有孔虫具有较高的地理可重复性和多样性，且具有较高的ISP值，至少在新生代具有更大的价值。双壳类和底栖有孔虫均表现出较长的平均物种存续时间和较多的物种重叠矛盾。因此，它们的生物地层潜力在区域间尺度上较为有限。研究剖面中菊石类和浮游有孔虫的物种存续时间较短，这可归因于它们的灭绝率较高。相对于简单的时空分析，ua方法可以准确地评估给定分类群的地层潜力。研究结果表明，生活习性直接影响物种存续，从而影响化石群的地层潜力。在此基础上，提出了化石类群排序指标（地层潜力指数）。Ahmed A. Abdelhady，埃及Minia大学理学院地质系，埃及El-Minia 61519Alhady2003@mu.edu.eg Barbara Seuss, Friedrich-Alexander University, GeoZentrum Nordbayern - Paleobiology Section, Loewenichstraße 28,91054 Erlangen, Germany。barbara.seuss@fau.de ABDELHADY， SEUSS， & HASSAN：无脊椎动物的排名2 Hatem F. HASSAN，埃及塞得港大学理学院地质系，42522塞得港hatem99_eg@yahoo.com
Fossil groups are used for biochronological dating of rocks for decades. This manuscript presents a quantitative approach to appraise and compare the quality of selected taxa as biostratigraphic markers. Based on species occurrence of ammonites, bivalves, and planktic and benthic foraminifers we evaluate the potential of these to rank them quantitatively. The spatiotemporal analyses of occurrence data (species duration, geographic range) were integrated in results of the Unitary Association method, which measures superpositional contradictions in addition to the generation of a number of UAs. The results indicate that Jurassic ammonites have the lowest species duration, and that the majority of species is confined to a single UA-zone. Additionally, ammonites have the lowest numbers of contradicted bio-events. However, planktic foraminifers are more valuable at least in the Cenozoic as they have a high geographic reproducibility and diversity, and higher ISP values. The bivalves and benthic foraminifers both show longer average species durations and more superpositional contradictions per species. Therefore, their biostratigraphic potential is more limited at an interregional scale. The shorter species durations of ammonites and planktic foraminifers in the studied sections can be attributed to their higher extinction rates. As an advantage to simple spatio-temporal analyses, the UA-method can accurately assess the stratigraphic potential of a given taxonomic group. The results obtained herein indicate that the life-habit has direct impact on the species duration and thus, the stratigraphic potential of the fossil groups. Based on the results achieved from this study, an index for ranking fossil groups (Index of Stratigraphic Potential ‘ISP’) is introduced. Ahmed A. Abdelhady, Geology Department, Faculty of Science, Minia University, 61519 El-Minia, Egypt. Alhady2003@mu.edu.eg Barbara Seuss, Friedrich-Alexander University, GeoZentrum Nordbayern – Paleobiology Section, Loewenichstraße 28, 91054 Erlangen, Germany. barbara.seuss@fau.de ABDELHADY, SEUSS, & HASSAN: RANKING OF INVERTEBRATES 2 Hatem F. Hassan, Geology Department, Faculty of Science, Port Said University, 42522 Port Said, Egypt. hatem99_eg@yahoo.com