Precise U-Pb age constrains on the Ediacaran biota in Podolia, East European Platform, Ukraine

Soldatenko, Yevheniia; Albani, Abderrazzak El; Ruzina, M. V.; Fontaine, Claude; Nesterovsky, V. A.; Paquette, Jean‐Louis; Meunier, Alain; Ovtcharova, Maria

doi:10.1038/s41598-018-38448-9

Cited by 32 publications

(9 citation statements)

References 52 publications

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“…Geological setting. Located on the southwestern outskirts of the Ukrainian crystalline shield (Fig.1), the upper part of sedimentary basin of Podillya is stratigraphically related to the Upper Vendian -by the regional stratigraphic nomenclature, and to the Ediacaran -according to the international stratigraphic scale and confirmed by the recent results in determining the absolute age using bentonite layers from this basin (Soldatenko et al, 2019). The sedimentary cover is represented by the Upper-Ediacaran deposits, subdivided into Mohyliv-Podylska and Kanilivska Groups.…”

supporting

confidence: 63%

Neoproterozoic microbially-induced sedimentary structures (MISS) from Ediacaran Podillya Basin, Ukraine: mineralogical particularity and paleoenvironmental application

Soldatenko¹,

Albani²,

Fontaine³

et al. 2019

Journ. Geol., Geogr., and Geoec..

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The Neoproterozoic Podillya sedimentary Basin is well known to the imprints of the Ediacaran soft-bodied fauna which were previously described by many ukrainian and foreign authors. At this period, fossil-rich siliciclastic sediments recognized as traces of early metazoans also contain evidence of significant microbiological activity. In these ediacaran sediments, many structures can be interpreted as microbially induced sedimentary structures (MISS). Their morphologies have a great similarity with modern structures observed in relation with micro-organism activity. These specific structure and surfaces and their mineral composition are the criteria used to study the bacterial structures from the ukrainian Neoproterozoic sedimentary basin. Our results demonstrate microorganisms were organized in bacterial mats whose activity was recorded in the difference of mineralogy between biological films and host rocks. On outcrop, the different type of MISS are often associated with lenticular beddings, ripples and hummocky cross structures indicative of coastal-marine conditions close to the littoral zone of the basin at this epoch. If MISS are important in the issue of paleogeographic reconstructions, they also give precious informations about early diagenetic processes, syn- and post-sedimentation. By mineralogical approach we show that during the time of development of MISS structures and the burial that followed the diagenetic processes have remained moderate. Finally, the close coexistence with ediacarian fossils suggest that such bacterial mats could be at the origin of the fossilization process of soft-bodies of enigmatic Ediacaran biota of Mohyliv-Podylska Group and their preservation until today.

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supporting

confidence: 63%

Neoproterozoic microbially-induced sedimentary structures (MISS) from Ediacaran Podillya Basin, Ukraine: mineralogical particularity and paleoenvironmental application

Soldatenko¹,

Albani²,

Fontaine³

et al. 2019

Journ. Geol., Geogr., and Geoec..

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“…The base of the overlying Yaryshev (Yarishiv) Formation was previously dated to 553 Ma by Grazhdankin et al (2011) and Grazhdankin (2014) but newer dating of bentonite layers from the Yampol Member top package (layer B1, c. 1 m above the thick-bedded sandstones) points to 556.78 ± 0.18 Ma (Soldatenko et al 2019). The presented fossils from the upper part of the Yampol Member are below the bentonite.…”

Section: Geological Settingmentioning

confidence: 99%

“…Therefore, the fossils are potentially the possible oldest representatives of tunicates if their systematic position is so. The Ediacaran of Podolia provided several taxa of macrofossils belonging to diverse taxonomic groups (e.g., Palij 1976;Fedonkin 1985;Velikanov 1985; Fedonkin 1 3 and Vickers-Rich 2007; Martyshyn 2012;Gozhik 2013;Ivantsov et al 2015;Martyshyn 2015, 2017;Nesterovsky et al 2018;Soldatenko et al 2019). Moreover, some ichnotaxa are described from these deposits (e.g., Palij 1974Palij , 1976Gureev 1983Gureev , 1984Gureev , 1986Ivantsov et al 2015;Grytsenko 2020; Uchman and Martyshyn 2020).…”

Section: Introductionmentioning

confidence: 99%

New Ediacaran fossils from the Ukraine, some with a putative tunicate relationship

Martyshyn

Uchman

2021

PalZ

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Sack-like body fossils Finkoella ukrainica gen. et sp. nov. and F. oblonga sp. nov., and reticulate fossil Pharyngomorpha reticulata gen. et sp. nov. are described from the upper Ediacaran shallow-marine deposits of Ukraine, which are no younger than 557 Ma. The first two resemble the flattened bodies of tunicates showing mainly the outline of tunica, while the third is considered as a fragment of the pharyngeal basket of a tunicate. F. ukrainica is represented by smaller individuals interpreted as juveniles, which may occur in clusters together with less numerous larger individuals. The larger forms are interpreted as adults, some of which show the preserved oral/atrial syphons and possible traces of internal organs bulging through the tunica. Moreover, Burykhia sp. from the uppermost Ediacaran of the same region is presented. This is the second and younger occurrence of the genus Burykhia, which is preserved as a possible fragment of the pharyngeal basket. All the fossils are preserved as the “death masks” between microbial mats, and their appearance depends partly on the relation to the parting surface on which they are observed. The presented new taxa along with the literature data reinforce the possibility that tunicates originated already in late Ediacaran.

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“…The Lyadova Member is mainly made of brown and greenish argillites and has the thickness of up to 25 m. The Liadova Member contains two layers of bentonites with the thickness of near 30 cm. The bentonites contain zircon, which was used for the age determination by the U-Pb TIMs method (557 Ma, (Soldatenko et al 2019)). The Lyadova Member contains remains of algal films and complex microfossils typical for the Mohyliv Formation (Velikanov et al 1983).…”

Section: Geological Settingmentioning

confidence: 99%

Untitled

2020

GEO&BIO

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Diversity of the Vendian fossils of Podillia (Western Ukraine). -V. Grytsenko. -Diversity of Vendian fossil associations is a common feature. The diversity depends on many factors: firstly, physical conditions in the basin, in which animals lived (i.e. depth of the sea, its oxygenation state, temperature, salinity, hard or soft bottom, wave activity, and currents); secondly, biological conditions (members of the association, nutrition, bioturbation, presence of enemies, laws of evolution, etc.). Fossils represent remains of different soft-body animals (with radial, bilateral, and triradial symmetry) as well as algae, microfossils, bacteria and fungi. Bacteria (cyanobacteria) and micro-algae formed mats, which served as food resource for animals. Only some of the animals had special organs for eating bacterial mats. The eating tracks were discovered in the White Sea and Australian Ediacaran sections. Facies changes determined the sequence of fossil associations. The lithological succession reflects changing water depth and oxygenation conditions. Different conditions favored different fossil associations (communities). Fifteen species of imprints and animal tracks are described. The diversity of imprints, tracks, and sedimentary rocks is illustrated on photos. In previous articles, new species of vendobionts from the Vendian of Ukraine were described and imaged. More than two thousand samples are stored in the Geological Department of the National Museum of Natural History NAS of Ukraine. The samples need more detailed study including statistic treatment and description. There are some species, which are similar with those from the Ediacaran of Russia and Ediacaran species from the ancient sea basins (paleobasins) of others continents (Gondwana and Laurasia), but there are dozens of species, which are different. Among the reasons of the differences, in our opinion, are paleogeographical controls, which were linked with climate and in accordance with facies distribution. The Cryogenian (Snowball Earth) period (720-635 millions of years ago) was followed by Ediacaran (635-542 millions of years ago). Predominantly carbonate sedimentary rocks (limestones and dolostones) are typical for the Ediacaran successions of East Siberia and some regions of China. The carbonate accumulations are associated with warm or even tropical climates. The almost entire absence of carbonate sedimentary rocks in the Ediacaran sequence of Podillia is a possible testimony of temperate climate, which established after glaciations of the Cryogenian age in Baltica. The food resource for the Ediacaran animal communities were likely bacterial mats and plankton. Attention should be paid to animal remains and bacterial mats found in a large quarry on the left bank of the Dniester River near Novodniestrovsk, which has potential for discoveries of new species of Ediacaran animals.

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Precise U-Pb age constrains on the Ediacaran biota in Podolia, East European Platform, Ukraine

Cited by 32 publications

References 52 publications

Neoproterozoic microbially-induced sedimentary structures (MISS) from Ediacaran Podillya Basin, Ukraine: mineralogical particularity and paleoenvironmental application

Neoproterozoic microbially-induced sedimentary structures (MISS) from Ediacaran Podillya Basin, Ukraine: mineralogical particularity and paleoenvironmental application

New Ediacaran fossils from the Ukraine, some with a putative tunicate relationship

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