Miocene Central Paratethys stratigraphy – current status and future directions
Miocene Central Paratethys stratigraphy – current status and future directions
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DOI：
10.29041/strat.04.2.09
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发表时间：
2007
期刊：
影响因子：
1.5
通讯作者：
W. Piller;M. Harzhauser;O. Mandic
中科院分区：
文献类型：
--
作者：
W. Piller;M. Harzhauser;O. Mandic
帕拉提斯群岛复杂的地球动力学历史周期性地促进了高度特有生物群的演变，邻近的地中海和印度-太平洋省份之间的交流有限。由此产生的非常特殊的化石组合迫使分别对西部/中部和东部进行了区域年代地层划分。对于中央部分，我们提供了一个关于各个阶段的总结和更新的数据库，并回顾了与地中海地层格架相关联的现状。中新世中央准地层阶段的划分完全依据类型剖面的古生物标准(全息层型和面状层型)。它们都受到沉积裂隙或明显的相变化的限制，推断它们标志着海平面的低水位，并且没有一个单一的边界层型被定义。一些与地中海演替相关的连接点是以钙质超微浮游动物和浮游有孔虫为基础的；磁性地层对比非常有限。所有阶段都可以被认为是三级海平面旋回，其中埃根堡期、巴登期和潘尼期分别跨越三个海平面旋回，奥特南吉期、卡帕特期和萨尔马提亚期分别为一个。Karpatian/Bdenian界线与Burdigian/Lang hian(早/中新世)界线相关，Sarmatian/Pannian界线与Serravallian/Tortonian(中/晚中新世)界线相关。与三级旋回的相关性和天文信号的探测表明，中央部分的岩石记录中不仅存在一个区域性的信号，而且还有一个强烈的全球信号。由于目前对阶段的定义包括其全球扩散，因此正式定义的区域阶段是多余的，因此对中央部分也不是必要的。然而，如果阶段基本上是地区性的，那么像中央帕拉提斯那样的地区性规模将更为合适。
The complex geodynamic history of the Paratethys periodically fostered the evolution of a highly endemic biota with only limited exchange between the neighboring Mediterranean and Indo-Pacific provinces. The resulting very peculiar fossil assemblages forced the introduction of a regional chronostratigraphic subdivision for the Western/Central and Eastern Paratethys respectively. For the Central Paratethys we present a summarized and updated database for the individual stages, and we review the current status for correlation with the Mediterranean stratigraphic framework. The Miocene Central Paratethys stages were defined on exclusively paleontological criteria in type sections (holostratotypes and faciostratotypes). They are all bounded by either sedimentary hiatuses or distinct facies changes, inferred to mark lowstands in sea level, and not a single boundary stratotype has been defined. Some correlating tie-points to the Mediterranean succession are based on calcareous nannoplankton and planktonic foraminifers; magnetostratigraphic correlation is very limited. All stages can be assigned to the putatively third-order sea level cycles, with the Eggenburgian, Badenian and Pannonian Stages each spanning three cycles and the Ottnangian, Karpatian, and Sarmatian one each. The Karpatian/Badenian boundary correlates with the Burdigalian/Langhian (Early/Middle Miocene) boundary, and the Sarmatian/Pannonian boundary correlates with the Serravallian/Tortonian (Middle/Late Miocene) boundary. The correlation to third-order cycles and the detection of astronomical signals suggest that not only a regional but also a strong global signal is present in the rock record of the Central Paratethys. Since the current definition of a stage includes its global spread, formally defined regional stages are redundant and therefore also not necessary for the Central Paratethys. However, if stages are essentially regional, then a regional scale as for Central Paratethys would be much more appropriate.