Early complex tiering pattern: Upper Ordovician, Barrandian area, the Czech Republic

Q3 Earth and Planetary Sciences

Fossil Imprint Pub Date : 2021-01-01 DOI:10.37520/fi.2021.003

Pavel Bokr, R. Mikuláš, P. Budil, P. Kraft

引用次数: 0

Abstract

Upper Ordovician shallow marine fine-grained sandstones and siltstones exposed in the Loděnice – vinice locality yielded a distinct and well-preserved tiering pattern of trace fossils. The two uppermost tiers are composed mainly of Bifungites and Nereites. Deeper in the sediment, tiers dominated by Thalassinoides, Zoophycos and Teichichnus occur. Most of the succession is completely bioturbated; however, several storm layers enabled study of a well-preserved frozen tiering pattern. Large portions of the bedding planes (ichnologic snapshots) showed a considerable patchiness of intensive surface bioturbation and a preferred orientation of Bifungites. The identified tiering pattern is one of the earliest examples of a well-documented complex tiering of burrows documented in detail.

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早期复杂层序模式:捷克共和国Barrandian地区上奥陶统

在洛德涅斯-维尼斯地区暴露的上奥陶统浅海相细粒砂岩和粉砂岩中，发现了保存完好的明显的化石层序。最上面的两层主要由双辉石和内辉石组成。在沉积物的深处，以海藻纲、植藻纲和Teichichnus纲为主的分层出现。大部分演替完全受到生物扰动;然而，几个风暴层使研究保存完好的冰冻分层模式成为可能。大部分层理平面(技术快照)显示出明显的表面生物扰动斑块和双辉石的优先取向。所确定的分层模式是详细记录的有良好记录的复杂洞穴分层的最早例子之一。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fossil Imprint Earth and Planetary Sciences-Stratigraphy

CiteScore

1.70

自引率

0.00%

发文量

期刊介绍： Fossil Imprint (formerly Acta Musei Nationalis Pragae, Series B – Historia Naturalis) is an international, open access journal, publishing original papers and reviews of any length from all areas of paleontology and related disciplines, such as palaeoanthropology, biostratigraphy, palynology, and archaeobotany/zoology. All taxonomic groups are treated, including plants, invertebrates, vertebrates, microfossils, and ichnofossils, with a special emphasis on terrestrial and post-Palaeozoic marine biota. We encourage the publication of international meetings as well as special thematic issues. The aim of the journal is to spread the scientific knowledge with no restrictions, and to allow access to it to any interested person. Each article includes information about the date of receiving, accepting and issue.