Variations in preservation of exceptional fossils within concretions.

IF 3 2区 地球科学 Q1 PALEONTOLOGY
Swiss Journal of Palaeontology Pub Date : 2023-01-01 Epub Date: 2023-09-14 DOI:10.1186/s13358-023-00284-4
Farid Saleh, Thomas Clements, Vincent Perrier, Allison C Daley, Jonathan B Antcliffe
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Abstract

Concretions are an interesting mode of preservation that can occasionally yield fossils with soft tissues. To properly interpret these fossils, an understanding of their fossilization is required. Probabilistic models are useful tools to identify variations between different Konservat-Lagerstätten that are separated spatially and temporally. However, the application of probabilistic modeling has been limited to Early Paleozoic Konservat-Lagerstätten preserved in shales. In this paper, the patterns of preservation of three concretionary Konservat-Lagerstätten-the Carboniferous Mazon Creek (USA) and Montceau-les-Mines (France), and the Silurian Herefordshire Lagerstätte (UK)-are analyzed using a statistical approach. It is demonstrated that the degree of biotic involvement, i.e., the degree to which a carcass dictates its own preservation, is connected to internal organ conditional probabilities-the probabilities of finding an internal organ associated with another structure such as biomineralized, sclerotized, cuticularized, or cellular body walls. In concretions that are externally forced with little biological mediation (e.g., Herefordshire), all internal organ conditional probabilities are uniform. As biological mediation in concretion formation becomes more pronounced, heterogeneities in conditional probabilities are introduced (e.g., Montceau-les-Mines and Mazon Creek). The three concretionary sites were also compared with previously investigated Konservat-Lagerstätten preserving fossils in shales to demonstrate how the developed probability framework aids in understanding the broad-scale functioning of preservation in Konservat-Lagerstätten.

Supplementary information: The online version contains supplementary material available at 10.1186/s13358-023-00284-4.

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结核中特殊化石保存的变化。
混凝土是一种有趣的保存方式,偶尔会产生带有软组织的化石。为了正确地解释这些化石,需要了解它们的化石结构。概率模型是识别不同Konservat Lagerstätten之间在空间和时间上分离的变化的有用工具。然而,概率建模的应用仅限于保存在页岩中的早古生代Konservat Lagerstätten。本文采用统计方法分析了石炭纪马松溪(美国)和法国蒙塞厄矿山(法国)以及志留纪赫里福德郡拉格斯泰特(英国)三个具体的拉格斯泰滕保存模式。研究表明,生物参与的程度,即尸体决定其自身保存的程度,与内脏条件概率有关,即发现与另一结构相关的内脏的概率,如生物矿化、硬化、角质化或细胞体壁。在几乎没有生物学中介的外部强迫的具体化中(例如,赫里福德郡),所有内部器官的条件概率都是一致的。随着结核形成中的生物中介作用变得更加明显,引入了条件概率的异质性(例如,Montceau les Mines和Mazon Creek)。还将这三个结核遗址与之前调查的Konservat Lagerstätten在页岩中保存化石进行了比较,以证明所开发的概率框架如何有助于理解Konservat Lagerstètten保存的广泛功能。补充信息:在线版本包含补充材料,可访问10.1186/s13358-023-00284-4。
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
Swiss Journal of Palaeontology
Swiss Journal of Palaeontology Earth and Planetary Sciences-Paleontology
CiteScore
4.30
自引率
16.70%
发文量
17
审稿时长
4 weeks
期刊介绍: The Swiss Journal of Palaeontology publishes original research and review articles of interest to the international community in the fields of palaeontology, taxonomy and systematics, while recognising at the same time the importance of documenting high-quality palaeontological data in a regional context. Palaeobiology in combination with alpha taxonomy is a core topic of the journal. Submitted papers should have an appeal as wide as possible, directed towards an international readership. Contributions should not have been simultaneously submitted elsewhere, and the overlap of content between related articles should be minimal. Duplications of text and the use of previously published illustrations without adequate citation are unacceptable. If a manuscript has two or more authors, both or all have to sign to confirm they all were involved in the work and have agreed to its submission. The preferred manuscript language is UK English, but consistently used US English is also acceptable. We encourage the publication of proceedings of international meetings as well as special thematic issues. Short contributions and book reviews are also accepted. An international editorial team as well as guest editors guarantee that the thematic issues as well as all articles in regular issues are peer-reviewed and meet the highest standards.
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