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首页> 外文期刊>Stratigraphy >Paleozoic stratigraphy of the Longi-Taormina Unit (Peloritanian Mountains, southern Italy)
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Paleozoic stratigraphy of the Longi-Taormina Unit (Peloritanian Mountains, southern Italy)

机译：Longi-Taormina单元的古生代地层（意大利南部的Peloritanian山）

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摘要

In this study, we report the results of litho- and biostratigraphic analyses made in the mildly metamorphosed Paleozoic succession of the Longi-Taormina Unit (Peloritanian Mountains, southern Italy), which up to now is poorly known. Three main formations based on their litho- and biostratigraphy have been defined and proposed for the first time (from base to top): Castelmola Formation, Lower Pizzo Leo Formation, and Upper Pizzo Leo Formation. The first two formations, composed mostly of marine fine-grained siliciclastic rocks, host Upper Ordovician calc-alkaline and Silurian alkaline volcanites, respectively. The upper formation is made up primarily of Silurian-Devonian pelagic metacarbonates which have released conodonts from Ludlow and Lochkovian (delta Zone) to Emsian (kitabicus, excavatus, and nothoperbonus-inversus zones) as well as Emsian dacryoconarids. These findings are relevant as they are the oldest ever found in this sector of the Alpine Chain, and they have enabled the best and most accurate dating made until now. The studied Paleozoic succession proved to be an important key-site to better understand facies evolution to neighboring domains like, in par-ticular, the Calabrian Stilo Unit or other better-known Paleozoic sequences around the western Mediterranean, like those outcropping in the Alps or in the Betic and Rifian chains.
机译：在这项研究中，我们报告了在Longi-Taormina单元（意大利南部的佩洛塔尼亚山脉）的轻度变质的古生代演替过程中进行的岩石地层学和生物地层学分析的结果。根据岩石地层学和生物地层学，首次定义并提出了三个主要地层（从底部到顶部）：Castelmola地层，Pizzo Leo下层和Pizzo Leo上层。前两个地层主要由海相细粒硅质碎屑岩组成，分别含上奥陶纪钙碱性和志留纪碱性火山岩。上部地层主要由志留系-泥盆系上层碳酸盐岩组成，这些沉积物将牙形体从Ludlow和Lochkovian（三角洲带）释放到Emsian（三角洲，岩屑和北非反转带）以及Emsian dacryoconarids。这些发现是有意义的，因为它们是该高山链条领域中最古老的发现，并且它们使迄今为止最好和最准确的约会成为可能。被研究的古生代被证明是更好地了解相向邻近领域的演化的重要场所，例如特别是卡拉布里亚史蒂洛单元或西地中海周围其他较著名的古生代序列，如在阿尔卑斯山或在Betic和Rifian连锁店中。

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