First occurrence of jumping trackway in upper Paleozoic glacially-related deposits, Paraná Basin, Brazil, and paleoenvironmental implications

IF 0.8 4区地球科学 Q4 PALEONTOLOGY

Ichnos-An International Journal for Plant and Animal Traces Pub Date : 2021-10-02 DOI:10.1080/10420940.2021.1998036

D. Silva, C. Vega, F. Vesely, D. Schemiko, Robson Tadeu Bolzon

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引用次数: 1

Abstract

Abstract Ichnology is fundamental to understanding characteristics of paleoenvironments such as hydrodynamic energy, oxygenation, salinity and substrate consistency. The Itararé Group is a Mississippian-Cisuralian lithostratigraphic unit of the Paraná Basin, in which trace fossils have been increasingly employed in paleoenvironmental reconstructions during the Late Paleozoic Ice Age in western Gondwana. The upper unit of the Itararé Group, the Rio do Sul Formation, exhibits a diverse trace fossil assemblage preserved in fine-grained rhythmites deposited in glacially related aquatic environments. In these rhythmites, trackways and trails produced by terrestrial and aquatic organisms were previously described. In this paper we report a new trace fossil collected from a rhythmite quarry near Trombudo Central, Santa Catarina state, and discuss potential paleoenvironmental implications. The studied specimen consists of an arthropod jumping trackway which could indicate a subaerial paleoenvironmental setting corroborating previous ichnological studies.

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跳跃轨迹首次出现于巴西帕拉南盆地上古生界与冰川有关的矿床及其古环境意义

技术是理解古环境特征的基础，如水动力能、氧合、盐度和底物一致性。itarar群是帕拉南盆地的一个密西西比-西侏罗统岩石地层单元，其微量化石在冈瓦纳西部晚古生代冰期的古环境重建中得到了越来越多的应用。itarar群的上部单元，Rio do Sul组，在与冰川相关的水生环境中沉积的细粒节奏岩中保存了多种微量化石组合。在这些节律虫中，陆生和水生生物产生的轨道和小径在以前被描述过。本文报道了在美国圣卡塔琳娜州Trombudo中心附近的节律虫采石场收集到的一种新的痕迹化石，并讨论了其潜在的古环境意义。所研究的标本包括一个节肢动物跳跃轨迹，这可能表明一个陆上的古环境背景，证实了先前的技术研究。

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来源期刊

Ichnos-An International Journal for Plant and Animal Traces PALEONTOLOGY-

CiteScore

2.50

自引率

12.50%

发文量

审稿时长

>12 weeks

期刊介绍： The foremost aim of Ichnos is to promote excellence in ichnologic research. Primary emphases center upon the ethologic and ecologic significance of tracemaking organisms; organism-substrate interrelationships; and the role of biogenic processes in environmental reconstruction, sediment dynamics, sequence or event stratigraphy, biogeochemistry, and sedimentary diagenesis. Each contribution rests upon a firm taxonomic foundation, although papers dealing solely with systematics and nomenclature may have less priority than those dealing with conceptual and interpretive aspects of ichnology. Contributions from biologists and geologists are equally welcome. The format for Ichnos is designed to accommodate several types of manuscripts, including Research Articles (comprehensive articles dealing with original, fundamental research in ichnology), and Short Communications (short, succinct papers treating certain aspects of the history of ichnology, book reviews, news and notes, or invited comments dealing with current or contentious issues). The large page size and two-column format lend flexibility to the design of tables and illustrations. Thorough but timely reviews and rapid publication of manuscripts are integral parts of the process.