Vendium

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The Vendium (Russian: вендская система, wendskaja sistema ) is a regional stratigraphic unit of the youngest Neoproterozoic in Russia . It roughly corresponds to the Ediacarium of the International Geological Time Scale and the Sinium of the Chinese regional time scale. Before the official inclusion of the Ediacarium in the international time scale at the 32nd International Geological Congress in Florence in August 2004, the Vendium also had supraregional significance, as the name was used for the same global chronostratigraphic unit of the most recent Precambrian (then officially "Neoproterozoic III") . Sometimes the term was used in this sense even after 2004 and not only by Russian geologists.

The name Vendium is derived from the Wends , a collective name for various West Slavic peoples of the Middle Ages , and was coined by the Russian geologist Boris Sokolow in 1952. The type region of the Vendium is the western edge of the Eastern European Platform in Belarus and western Ukraine ( Volhynia and Podolia ). West of the Urals, the Vendium is mainly represented by marine terrigenous sediments as well as volcanic-sedimentary series and glacial deposits. In Central Siberia, however, it is represented by predominantly carbonate sequences.

The term " Vendobionts " for the gigantic unicellular organisms , to which a large part of the body fossils of the Ediacara fauna is said to go back, is derived from their occurrence in sediments of "Vendic" (Ediacaric) age.

Individual evidence

  1. ↑ a b c G. M. Narbonne, S. Xiao, GA Shields, JG Gehling: The Ediacaran Period. Pp. 413-435 in Felix M. Gradstein, James G. Ogg, Mark D. Schmitz, Gabi M. Ogg (eds.): The Geologic Time Scale 2012. Elsevier BV, 2012, doi : 10.1016 / B978-0-444 -59425-9.00018-4 .
  2. ^ A b Andrew Knoll, Malcolm Walter, Guy Narbonne, Nicholas Christie-Blick: The Ediacaran Period: a new addition to the geologic time scale. Lethaia. Vol. 39, No. 1, 2006, pp. 3-13, doi : 10.1080 / 00241160500409223 .
  3. ↑ a b c d B. S. Sokolov: The Vendian System and “Neoproterozoic III”. Stratigraphy and Geological Correlation. Vol. 3, No. 6, 1995, pp. 575-590.
  4. ^ A b c G. JH McCall: The Vendian (Ediacaran) in the geological record: Enigmas in geology's prelude to the Cambrian explosion. Earth Science Reviews. Vol. 77, No. 1-3, 2006, pp. 1-229, doi : 10.1016 / j.earscirev.2005.08.004 .
  5. ↑ NM Chumakov, MA Semikhatov, VN Sergeev: Vendian Reference Section of Southern Middle Siberia. Stratigraphy and Geological Correlation. Vol. 21, No. 4, 2013, pp. 359-382, doi : 10.1134 / S0869593813040023 .
  6. ↑ Adolf Seilacher, Dmitri Grazhdankin, Anton Legouta: Ediacaran biota: The dawn of animal life in the shadow of giant protists. Paleontological Research. Vol. 7, No. 1, 2003, pp. 43-54, doi : 10.1134 / S0869593813040023 .

Web links

  • You say Ediacaran, I say Vendian. Article by Anna Salleh on ABC Science from May 20, 2004 on the controversy about the better reference profile for the most recent Neoproterozoic and thus about the naming of the corresponding epoch (Ediacarium or Vendium).