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Organic-walled microfossils in the Ediacaran of Estonia: Biodiversity on the East European Platform
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.ORCID iD: 0000-0002-1434-7131
2020 (English)In: Precambrian Research, ISSN 0301-9268, E-ISSN 1872-7433, Vol. 341, article id 105626Article in journal (Refereed) Published
Abstract [en]

Precambrian organic-walled microfossils are not only a source for studying evolution but also increasingly associated with stratigraphic correlation, based on key fossils and assemblage composition. For this reason, two drill cores from north-eastern Estonia have been studied for their content and stratigraphic distribution of organic-walled microfossils (OWM), analysing samples from the Precambrian Gdov, Kotlin, and Voronka formations. The recovered assemblages are generally well-preserved and diverse consisting of abundant sphaeromorphs, such as Leiosphaeridiaspp. and Pterospermopsimorpha spp., filamentous cyanobacteria, e.g. Cephalonyx geminatus and Palaeolyngbya catenata, and different types of cellular/colonial aggregates. In contrast, acanthomorphic acritarchs are rare with only a few unidentified examples present. The presence of taxa such as Pomoria rhomboidalisand Primoflagella speciosa in combination with the absence of large acanthomorphs suggests a late Ediacaran age of the studied samples. All in all, 38 species within 22 different genera are described herein, as are 9 taxa of unknown taxonomic affiliation. Another 11 taxa are briefly mentioned and depicted in order to provide for a better overview of the diversity of the assemblage. The stratigraphic distribution of the recognized taxa and assemblages can provide a powerful tool for correlation on the East European Platform as well as between Baltica and other palaeogeographic regions during the Ediacaran.

Place, publisher, year, edition, pages
2020. Vol. 341, article id 105626
Keywords [en]
Ediacaran, East European Platform, Organic-walled microfossils, Estonia
National Category
Other Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:uu:diva-424414DOI: 10.1016/j.precamres.2020.105626ISI: 000528207600001OAI: oai:DiVA.org:uu-424414DiVA, id: diva2:1497158
Available from: 2020-11-04 Created: 2020-11-04 Last updated: 2020-12-15

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Willman, Sebastian

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