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首页> 外文期刊>Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System >Astronomical calibration of the middle Eocene Contessa Highway section (Gubbio, Italy)
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Astronomical calibration of the middle Eocene Contessa Highway section (Gubbio, Italy)

机译：始新世Contessa公路中段（意大利古比奥）的天文校准

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摘要

The Eocene climatic system experienced an important transition from warm Paleocene greenhouse to icehouse Oligocene conditions. This transition could first appear as a long-term cooling trend but, at an up-close look, this period is a complex combination of climatic events and, for most of them, causes and consequences are still not fully characterized. In this context, a study has been carried out on the middle Eocene sedimentary succession of the Contessa Highway section, central Italy, which is proposed as the Global Stratotype Section and Point (GSSP) for the Lutetian/Bartonian boundary at the top of the Chron 19n, with an astronomically calibrated age of 41.23. Ma. Through a cyclostratigraphic analysis of the rhythmic sedimentary alternations and combination with the results of time series analysis of the proxy record, we provide an orbital tuning of the middle Eocene and astronomical calibration of the bio-magnetostratigraphic events (particularly for the C19n/C18r Chron boundary) recognized at the Contessa Highway section.
机译：始新世气候系统经历了从古新世温暖的温室到冰室渐新世的重要过渡。这种转变可能首先表现为长期的降温趋势，但从近距离看，这个时期是气候事件的复杂组合，并且对于大多数气候事件而言，其原因和后果仍未完全表征。在这种情况下，已对意大利中部Contessa公路段的始新世中期沉积演替进行了研究，该段被提议作为Chron顶部Lutetian / Bartonian边界的全球层状剖面和点（GSSP）。 19n，经天文校准的年龄为41.23。嘛。通过对节律性沉积变化的旋回地层分析，并与代理记录的时间序列分析结果相结合，我们提供了中始新世的轨道调整和生物磁地层事件的天文校准（尤其是对于C19n / C18r Chron边界） ）在Contessa高速公路部分获得认可。

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