Within a 5.5-m-thick succession of upper Burdigalian (CNP-zone NN4) shallow neritic sediments from the North Alpine Foreland Basin in Lower Austria a high-resolution section of finely laminated sediment with a thickness of 940.5 mm was logged. The section was continuously sampled, resulting in 100 samples, covering a thickness of ~ 10 mm each. An integrated approach was applied to these samples in order to study proxy records including calcareous nannoplankton, geochemical and geophysical data. Multivariate statistics on the autochthonous assemblage were used to evaluate the ecological preferences of each taxon and to rule out possible contamination of the signal by taphonomic processes. In order to assess changes in the assemblage composition throughout the section, three taphogroups were defined using both the autochthonous and allochthonous nannofossils. Based on the distribution of these taphogroups five distinct intervals were defined that are indicative of centennial to decadal changes in palaeoenvironmental conditions. Combining these results with other proxies (geochemistry, geophysics) we were able to reconstruct short-term, small-scale variations in terms of temperature, primary productivity, bottom water oxygenation, organic matter flux, freshwater influx and changes in relative sea level in a highly dynamic shallow marine setting. This study represents the first such high-resolution analysis performed on a marine succession of late Burdigalian age. It is also a first attempt to analyse outcrop data on such a high-resolution, sub-Milankovitch scale, with respect to calcareous nannoplankton in conjunction with geochemical and sedimentological data.

中文翻译：

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高分辨率钙质浮游纳米生物古生态学作为早中新世小规模环境变化的代表

在来自下奥地利北部高山前陆盆地的 5.5 米厚的上布尔迪加尔 (CNP 带 NN4) 浅浅海沉积物序列中，记录了厚度为 940.5 毫米的细层状沉积物的高分辨率剖面。该部分连续取样，产生 100 个样品，每个样品覆盖约 10 毫米的厚度。对这些样本采用了综合方法，以研究包括钙质浮游纳米生物、地球化学和地球物理数据在内的代理记录。本地组合的多变量统计数据用于评估每个分类群的生态偏好，并排除可能的信号污染。为了评估整个部分的组合构成的变化，使用本地和异地纳米化石定义了三个发源组。根据这些发源群的分布，定义了五个不同的区间，这些区间表示古环境条件从百年到十年的变化。将这些结果与其他指标（地球化学、地球物理学）相结合，我们能够重建温度、初级生产力、底水氧化、有机物质通量、淡水流入和相对海平面变化方面的短期小规模变化。高度动态的浅海环境。这项研究代表了首次对布尔迪加尔时代晚期的海洋演替进行的高分辨率分析。这也是第一次尝试在如此高分辨率的亚米兰科维奇尺度上分析露头数据，