Carbonate-hosted Avalon-type fossils in arctic Siberia

Abstract

Research Article| October 01, 2008 Carbonate-hosted Avalon-type fossils in arctic Siberia Dmitriy V. Grazhdankin; Dmitriy V. Grazhdankin 11Institute of Petroleum Geology and Geophysics, Koptyug Avenue 3, Novosibirsk 630090, Russia Search for other works by this author on: GSW Google Scholar Uwe Balthasar; Uwe Balthasar 22Uppsala University, Department of Earth Sciences, Villavägen 16, Uppsala 75236, Sweden Search for other works by this author on: GSW Google Scholar Konstantin E. Nagovitsin; Konstantin E. Nagovitsin 11Institute of Petroleum Geology and Geophysics, Koptyug Avenue 3, Novosibirsk 630090, Russia Search for other works by this author on: GSW Google Scholar Boris B. Kochnev Boris B. Kochnev 11Institute of Petroleum Geology and Geophysics, Koptyug Avenue 3, Novosibirsk 630090, Russia Search for other works by this author on: GSW Google Scholar Geology (2008) 36 (10): 803–806. https://doi.org/10.1130/G24946A.1 Article history received: 13 Mar 2008 rev-recd: 24 Jun 2008 accepted: 30 Jun 2008 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Dmitriy V. Grazhdankin, Uwe Balthasar, Konstantin E. Nagovitsin, Boris B. Kochnev; Carbonate-hosted Avalon-type fossils in arctic Siberia. Geology 2008;; 36 (10): 803–806. doi: https://doi.org/10.1130/G24946A.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Avalon-type fossils are crucial to understanding the origin of Phanerozoic ecosystems, but their usual occurrence in volcaniclastic and siliciclastic facies greatly limits their paleobiological resolution. The unique carbonate-hosted assemblage of the Khatyspyt Formation, on the Olenek uplift of north-central Siberia, promises a much enhanced anatomical and paleo-ecological view of these enigmatic organisms. Avalon-type fossils are preserved by authigenic carbonate cementation in intervals of finely laminated nodular limestones (Khatyspyt-type taphonomic window). Interbedded silicified calcareous mudstones yield diverse carbonaceous compressions, occasionally with taphonomic phantoms of Avalon-type taxa (Miaohe-type taphonomic window). Styles of moldic preservation do not appear to be taxon selective, and therefore cannot alone be responsible for the morphological distinctiveness of Ediacaran macrofossils and the profound disparity in the taxonomic composition between fossil assemblages. On the other hand, the exclusion of Avalon-type fossils from carbonaceous compressions (Miaohe-type preservational window) is a real taphonomic signal that provides an important constraint on the properties of certain Ediacaran tissues. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.