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Extreme freshwater release during the late Paleozoic Gondwana deglaciation and its impact on coastal ecosystems

2006; Geological Society of America; Volume: 34; Issue: 12 Linguagem: Inglês

10.1130/g22994a.1

1943-2682

Luís A. Buatois, Renata Guimarães Netto, M. Gabriela Mángano, Patricia R.M.N. Balistieri,

Coastal and Marine Dynamics

Research Article| December 01, 2006 Extreme freshwater release during the late Paleozoic Gondwana deglaciation and its impact on coastal ecosystems Luis A. Buatois; Luis A. Buatois 1Department of Geological Sciences, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5E2, Canada Search for other works by this author on: GSW Google Scholar Renata G. Netto; Renata G. Netto 2Unisinos, Núcleo de Estudos Sedimentológicos e Estratigráficos, Av. Unisinos 950, 93022-000 São Leopoldo RS, Brazil Search for other works by this author on: GSW Google Scholar M. Gabriela Mángano; M. Gabriela Mángano 3Department of Geological Sciences, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5E2, Canada Search for other works by this author on: GSW Google Scholar Patricia R.M.N. Balistieri Patricia R.M.N. Balistieri 4Unisinos, Núcleo de Estudos Sedimentológicos e Estratigráficos, Av. Unisinos 950, 93022-000 São Leopoldo RS, Brazil Search for other works by this author on: GSW Google Scholar Author and Article Information Luis A. Buatois 1Department of Geological Sciences, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5E2, Canada Renata G. Netto 2Unisinos, Núcleo de Estudos Sedimentológicos e Estratigráficos, Av. Unisinos 950, 93022-000 São Leopoldo RS, Brazil M. Gabriela Mángano 3Department of Geological Sciences, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5E2, Canada Patricia R.M.N. Balistieri 4Unisinos, Núcleo de Estudos Sedimentológicos e Estratigráficos, Av. Unisinos 950, 93022-000 São Leopoldo RS, Brazil Publisher: Geological Society of America Received: 15 May 2006 Revision Received: 28 Jun 2006 Accepted: 29 Jun 2006 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 The Geological Society of America, Inc. Geology (2006) 34 (12): 1021–1024. https://doi.org/10.1130/G22994A.1 Article history Received: 15 May 2006 Revision Received: 28 Jun 2006 Accepted: 29 Jun 2006 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Luis A. Buatois, Renata G. Netto, M. Gabriela Mángano, Patricia R.M.N. Balistieri; Extreme freshwater release during the late Paleozoic Gondwana deglaciation and its impact on coastal ecosystems. Geology 2006;; 34 (12): 1021–1024. doi: https://doi.org/10.1130/G22994A.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 Strata in the Paganzo, Tarija, and Paraná Basins of Argentina and Brazil provide evidence for reconstructing the effects of late Paleozoic glacial retreat. The depositional environment of the transgressive and early highstand fine-grained deposits has been controversial, with interpretations ranging from normal-marine shelves to estuaries to lakes. Whereas their counterparts from shallow-marine settings not influenced by glaciation host diverse, fully marine ichnofaunas, these fine-grained postglacial deposits are dominated by nonspecialized grazing trails, simple feeding traces, arthropod trackways, and fish trails. They are typical of freshwater environments and represent examples of the Mermia and Scoyenia ichnofacies. However, the local presence of acritarchs indicates sporadic marine influence. These observations suggest a new interpretation, that freshwater conditions in fjordlike settings across South America were widespread because Gondwanan basins were overwhelmed by strong meltwater discharge issuing from melting of the continental ice masses. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.