The Oldest Vendian

The Oldest Vendian

U-Th-Pb (SHRIMP II) isotopic dating of accessory zircons from Vendian (Ediacaran) ash tuffs of the Basa formation section (Asha Group, Southern Ural) was performed for the first time. The concordant age obtained (573.0 ± 2.3 Ma) can be interpreted as the upper age limit of the onset of the Timan Oro...

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Bibliographic Details
Published in:Doklady earth sciences Vol. 495; no. 2; p. 867
Main Authors: Razumovskiy, A. A, Novikov, I. A, Ryazantsev, A. V, Rud'ko, S. V, Kuznetsov, N. B, Yashunskiy, Yu. V
Format: Journal Article
Language:English
Published: Springer 01-12-2020
Subjects:
Fossils
Radioactive dating
Online Access:Get full text
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Summary:U-Th-Pb (SHRIMP II) isotopic dating of accessory zircons from Vendian (Ediacaran) ash tuffs of the Basa formation section (Asha Group, Southern Ural) was performed for the first time. The concordant age obtained (573.0 ± 2.3 Ma) can be interpreted as the upper age limit of the onset of the Timan Orogeny in the structure of the Southern Urals. Fossil remains of Kuckaraukia multituberculata and several paleopascichnids, belonging to the genera Palaeopascichnus and Orbisiana, were previously found in the rocks of the Upper Basa Subformation, and the first occurrence of Arumberia banksi was established. The age obtained indicates a more ancient age of this Vendian assemblage compared to the previously accepted one.
ISSN:1028-334X
DOI:10.1134/S1028334X20120090