Terminal Ediacaran carbonate tempestites in the eastern Yangtze Gorges area, South China

Xiao, Qian; She, Zhenbing; Wang, Guoqing; Li, Yuejie; Ouyang, Guang; Cao, Kenan; Mason, Roger; Du, Yu

doi:10.1016/j.palaeo.2020.109681

Cited by 12 publications

(3 citation statements)

References 96 publications

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“…In concert, these data suggest that organisms in the Khatyspyt Lagerstätte were confronted with dynamically changing environmental conditions. This is in good accordance with findings from the Shibantan Member (Duda, 2014;Duda et al, 2015;Xiao et al, 2020).…”

Section: Paleoenvironmental Conditionssupporting

confidence: 92%

Understanding the geobiology of the terminal Ediacaran Khatyspyt Lagerstätte (Arctic Siberia, Russia)

et al. 2020

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Section: Paleoenvironmental Conditionssupporting

confidence: 92%

Understanding the geobiology of the terminal Ediacaran Khatyspyt Lagerstätte (Arctic Siberia, Russia)

et al. 2020

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“…The Shibantan Member of the upper Ediacaran Dengying Formation, Yangtze Gorges area, South China, contains a high abundance of ichnofossils. These are preserved within 100-150 m of dark gray, thin-bedded, laminated peloidal limestone deposited in subtidal environments above the storm wave base and regularly impacted by current activity (Meyer et al 2014;Xiao et al 2020Xiao et al , 2021. Depositional age is constrained between 550 and 543 Ma (Dornbos et al 2004;Condon et al 2005;Xiao et al 2021;Yang et al 2021;Fig.…”

Section: Geological Settingmentioning

confidence: 99%

A new approach for investigating spatial relationships of ichnofossils: a case study of Ediacaran–Cambrian animal traces

Mitchell¹,

Evans²,

Chen³

et al. 2022

Paleobiology

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Trace fossils record foraging behaviors, the search for resources in patchy environments, of animals in the rock record. Quantification of the strength, density, and nature of foraging behaviors enables the investigation of how these may have changed through time. Here, we present a novel approach to explore such patterns using spatial point process analyses to quantify the scale and strength of ichnofossil spatial distributions on horizontal bedding planes. To demonstrate the utility of this approach, we use two samples from the terminal Ediacaran Shibantan Member in South China (between 551 and 543 Ma) and the early Cambrian Nagaur Sandstone in northwestern India (between 539 and 509 Ma). We find that ichnotaxa on both surfaces exhibited significant nonhomogeneous lateral patterns, with distinct levels of heterogeneity exhibited by different types of trace fossils. In the Shibantan, two ichnotaxa show evidence for mutual positive aggregation over a shared resource, suggesting the ability to focus on optimal resource areas. Trace fossils from the Nagaur Sandstone exhibit more sophisticated foraging behavior, with greater niche differentiation. Critically, mark correlation functions highlight significant spatial autocorrelation of trace fossil orientations, demonstrating the greater ability of these Cambrian tracemakers to focus on optimal patches. Despite potential limitations, these analyses hint at changes in the development and optimization of foraging at the Ediacaran/Cambrian transition and highlight the potential of spatial point process analysis to tease apart subtle differences in behavior in the trace fossil record.

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“…Weathered outcrops often display a rusty or ochre color, probably derived from the oxidative weathering of pyrite. The Shibantan Member is generally characterized by microlaminated limestones deposited in subtidal environments, with occasional occurrence of stromatolitic structures indicating deposition in the photic zone, as well as hummocky cross-stratification and lenticular rip-up clasts indicating depositional environments above the storm-wave base (Sun, 1986; Meyer et al, 2014; Duda et al, 2016; Xiao et al, 2020). Dark, millimeter-scale, clay-rich, crinkled laminae are also common in the Shibantan Member.…”

Section: Geological Settingmentioning

confidence: 99%

The Ediacaran frondose fossilArboreafrom the Shibantan limestone of South China

et al. 2020

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Bituminous limestone of the Ediacaran Shibantan Member of the Dengying Formation (551–539 Ma) in the Yangtze Gorges area contains a rare carbonate-hosted Ediacara-type macrofossil assemblage. This assemblage is dominated by the tubular fossil Wutubus Chen et al., 2014 and discoidal fossils, e.g., Hiemalora Fedonkin, 1982 and Aspidella Billings, 1872, but frondose organisms such as Charnia Ford, 1958, Rangea Gürich, 1929, and Arborea Glaessner and Wade, 1966 are also present. Herein, we report four species of Arborea from the Shibantan assemblage, including the type species Arborea arborea (Glaessner in Glaessner and Daily, 1959) Glaessner and Wade, 1966, Arborea denticulata new species, and two unnamed species, Arborea sp. A and Arborea sp. B. Arborea arborea is the most abundant frond in the Shibantan assemblage. Arborea denticulata n. sp. resembles Arborea arborea in general morphology but differs in its fewer primary branches and lower length/width ratio of primary branches. Arborea sp. A and Arborea sp. B are fronds with a Hiemalora-type basal attachment. Sealing by microbial mats and authigenic cementation may have played an important role in the preservation of Arborea in the Shibantan assemblage. The Shibantan material of Arborea extends the stratigraphic, ecological, and taphonomic ranges of this genus. UUID: http://zoobank.org/554f21da-5f09-4891-9deb-cbc00c41e5f1

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Terminal Ediacaran carbonate tempestites in the eastern Yangtze Gorges area, South China

Cited by 12 publications

References 96 publications

Understanding the geobiology of the terminal Ediacaran Khatyspyt Lagerstätte (Arctic Siberia, Russia)

Understanding the geobiology of the terminal Ediacaran Khatyspyt Lagerstätte (Arctic Siberia, Russia)

A new approach for investigating spatial relationships of ichnofossils: a case study of Ediacaran–Cambrian animal traces

The Ediacaran frondose fossilArboreafrom the Shibantan limestone of South China

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