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Recurrent emplacement of non-glacial diamictite during the late Paleozoic ice age

2018; Geological Society of America; Volume: 46; Issue: 7 Linguagem: Inglês

10.1130/g45011.1

1943-2682

Fernando Farias Vesely, Mérolyn Camila Naves de Lima Rodrigues, Eduardo L.M. Rosa, James Anthony Amato, Bárbara Trzaskos, John L. Isbell, Nicholas D. Fedorchuk,

Paleontology and Stratigraphy of Fossils

Research Article| June 07, 2018 Recurrent emplacement of non-glacial diamictite during the late Paleozoic ice age F.F. Vesely; F.F. Vesely 1Departamento de Geologia, Universidade Federal do Paraná, Curitiba, PR, Caixa Postal 19001, CEP 81531-980, Brazil Search for other works by this author on: GSW Google Scholar M.C.N.L. Rodrigues; M.C.N.L. Rodrigues 1Departamento de Geologia, Universidade Federal do Paraná, Curitiba, PR, Caixa Postal 19001, CEP 81531-980, Brazil Search for other works by this author on: GSW Google Scholar E.L.M. da Rosa; E.L.M. da Rosa 1Departamento de Geologia, Universidade Federal do Paraná, Curitiba, PR, Caixa Postal 19001, CEP 81531-980, Brazil Search for other works by this author on: GSW Google Scholar J.A. Amato; J.A. Amato 2Department of Geosciences, University of Wisconsin–Milwaukee, Milwaukee, Wisconsin 53211, USA Search for other works by this author on: GSW Google Scholar B. Trzaskos; B. Trzaskos 1Departamento de Geologia, Universidade Federal do Paraná, Curitiba, PR, Caixa Postal 19001, CEP 81531-980, Brazil Search for other works by this author on: GSW Google Scholar J.L. Isbell; J.L. Isbell 2Department of Geosciences, University of Wisconsin–Milwaukee, Milwaukee, Wisconsin 53211, USA Search for other works by this author on: GSW Google Scholar N.D. Fedorchuk N.D. Fedorchuk 2Department of Geosciences, University of Wisconsin–Milwaukee, Milwaukee, Wisconsin 53211, USA Search for other works by this author on: GSW Google Scholar Author and Article Information F.F. Vesely 1Departamento de Geologia, Universidade Federal do Paraná, Curitiba, PR, Caixa Postal 19001, CEP 81531-980, Brazil M.C.N.L. Rodrigues 1Departamento de Geologia, Universidade Federal do Paraná, Curitiba, PR, Caixa Postal 19001, CEP 81531-980, Brazil E.L.M. da Rosa 1Departamento de Geologia, Universidade Federal do Paraná, Curitiba, PR, Caixa Postal 19001, CEP 81531-980, Brazil J.A. Amato 2Department of Geosciences, University of Wisconsin–Milwaukee, Milwaukee, Wisconsin 53211, USA B. Trzaskos 1Departamento de Geologia, Universidade Federal do Paraná, Curitiba, PR, Caixa Postal 19001, CEP 81531-980, Brazil J.L. Isbell 2Department of Geosciences, University of Wisconsin–Milwaukee, Milwaukee, Wisconsin 53211, USA N.D. Fedorchuk 2Department of Geosciences, University of Wisconsin–Milwaukee, Milwaukee, Wisconsin 53211, USA Publisher: Geological Society of America Received: 05 Feb 2018 Revision Received: 12 May 2018 Accepted: 24 May 2018 First Online: 07 Jun 2018 Online Issn: 1943-2682 Print Issn: 0091-7613 © 2018 Geological Society of America Geology (2018) 46 (7): 615–618. https://doi.org/10.1130/G45011.1 Article history Received: 05 Feb 2018 Revision Received: 12 May 2018 Accepted: 24 May 2018 First Online: 07 Jun 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation F.F. Vesely, M.C.N.L. Rodrigues, E.L.M. da Rosa, J.A. Amato, B. Trzaskos, J.L. Isbell, N.D. Fedorchuk; Recurrent emplacement of non-glacial diamictite during the late Paleozoic ice age. Geology 2018;; 46 (7): 615–618. doi: https://doi.org/10.1130/G45011.1 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 Most ice-age diamictites were emplaced in basinal settings by non-subglacial processes. Nonetheless, the occurrence of diamictite in rock successions is widely employed to estimate ice extent and delimit glacial growth-decay cycles that serve as background for paleoclimate modeling. We report a cyclic diamictite-mudstone succession from the Bashkirian-Moscovian Campo do Tenente Formation in southern Brazil to investigate the timing of diamictite emplacement with respect to glaciation. Glacial cycles can be recognized, in which mudstones with ice-rafted debris record deposition in a marine-influenced water body during intervals of maximum ice advance. Diamictites, on the other hand, lack striated and faceted clasts, have deformed blocks of sandstones, and are enveloped by IRD-free mudstones. They are interpreted as non-glacial mass-transport deposits derived from delta collapse during intervals of maximum ice retreat, in which dispersed gravel derives from block assimilation and not from ice rafting. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.