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Late Paleozoic glacial episodes in Gondwanaland reflected in transgressive-regressive depositional sequences in Euramerica

1987; Geological Society of America; Volume: 98; Issue: 4 Linguagem: Inglês

10.1130/0016-7606(1987)98 2.0.co;2

1943-2674

J.J. Veevers, C.Mca. Powell,

Geological and Geochemical Analysis

Research Article| April 01, 1987 Late Paleozoic glacial episodes in Gondwanaland reflected in transgressive-regressive depositional sequences in Euramerica J. J. VEEVERS; J. J. VEEVERS 1Australian Plate Research Group, School of Earth Sciences, Macquarie University, New South Wales, 2109, Australia Search for other works by this author on: GSW Google Scholar C. McA. POWELL C. McA. POWELL 1Australian Plate Research Group, School of Earth Sciences, Macquarie University, New South Wales, 2109, Australia Search for other works by this author on: GSW Google Scholar Author and Article Information J. J. VEEVERS 1Australian Plate Research Group, School of Earth Sciences, Macquarie University, New South Wales, 2109, Australia C. McA. POWELL 1Australian Plate Research Group, School of Earth Sciences, Macquarie University, New South Wales, 2109, Australia Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1987) 98 (4): 475–487. https://doi.org/10.1130/0016-7606(1987)98 2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation J. J. VEEVERS, C. McA. POWELL; Late Paleozoic glacial episodes in Gondwanaland reflected in transgressive-regressive depositional sequences in Euramerica. GSA Bulletin 1987;; 98 (4): 475–487. doi: https://doi.org/10.1130/0016-7606(1987)98 2.0.CO;2 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 SocietyGSA Bulletin Search Advanced Search Abstract The Late Paleozoic glaciation of Gondwanaland comprised two short episodes, in the Famennian (I) and Visean (II) confined to Brazil and adjacent northwest Africa, and a long episode that started in the Namurian (IIIA) of eastern Australia and Bolivia/Argentina, expanded to cover much of Gondwanaland in the Stephanian/Asselian (IIIB), and collapsed in the early Sakmarian (IIIC). Dropstones in eastern Australia indicate that small ice centers lingered to the Kazanian. Across the belt of low latitudes north of Gondwanaland, short-ranging fossils in widespread shallow-marine and paralic deposits indicate synchronous deposition of transgressive-regressive sequences in different parts of Euramerica. These sequences correlate with glacial events in Gondwanaland at three levels: (a) four major regressions in Euramerica, in the Famennian (1), Visean (2), Namurian (3), Stephanian (4), and the Tastubian transgression that preceded the Sterlitamakian regression (5), also recorded in Gondwanaland, correlate with glacial episodes I, II, and IIIA, IIIB, and IIIC; (b) the time-interval of cyclothemic deposition in Euramerica (Brigantian or latest Visean to Sterlitamakian) correlates with that of glacial episode III; and (c) the dominant period of the Euramerican cyclothems, as estimated from the Middle and Late Pennsylvanian deposits of the mid-continent of North America, and of the thickest known Gondwanaland glacigenic sediment (the earliest Permian Lyons Group of Western Australia) is 0.4 Ma, equivalent in turn to the long orbital-eccentricity period of the Quaternary ice age, and the dominant period of fluctuation of the late Miocene Antarctic ice cap.The three levels of correlations confirm Wanless and Shepard's (1936) hypothesis that the Late Paleozoic cyclothems are controlled largely by sea-level fluctuations related to the Gondwanaland glaciation. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.