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TitleMiddle-Upper Devonian relative sea-level histories of central and western North American interior basins
AuthorDay, J; Uyeno, T; Norris, W; Witzke, B J; Bunker, B J
SourcePaleozoic sequence stratigraphy: views from the North American Craton; by Witzke, B J (ed.); Ludvigson, G A (ed.); Day, J (ed.); Geological Society of America, Special Paper 306, 1996 p. 259-275,
Alt SeriesGeological Survey of Canada, Contribution Series 26693
PublisherGeological Society of America
Mediapaper; on-line; digital
File formatpdf
AreaDawson Bay; Lake Winipegosis
Subjectsstratigraphic models; stratigraphic correlations; stratigraphic analyses; sea level changes; paleo-sea levels; transgressions; regressions; craton; Iowa Basin; Elk Point Basin; Devonian
Illustrationsstratigraphic charts; location maps; tables
AbstractNew subdivisions and refinement of the Euramerican Devonian eustatic sea level framework of Johnson and others (1985) and Johnson and Klapper (1992) are introduced, based on stratigraphic syntheses of Middle-Upper Devonian successions in three central and western North American cratonic basins. Accurate comparisons of the relative sea level histories, afforded by refined correlations, indicates that as many as six major sea level cycles (designed as Transgressive-Regressive (T-R) cycles) controlled the timing and patterns of marine deposition of mid-Eifelian-early Frasnian strata in all three areas. Deepening events that mark the beginnings of four of the six cratonic North American Devonian T-R cycles correspond directly to Euramerican eustatic T-R cycles Ie to IIb of Johnson and others (1985) and Johnson and Klapper (1992). A deepening event in the late Givetian (beginning in the interval of the Upper subterminus Fauna) is recognized and provides the basis for subdivision of Euramerican T-R cycle IIa into cycles IIa-1 and IIa-2. An early Frasnian deepening event (beginning during M.N. Zone 3 of Klapper, 1989) is recognized in the Iowa Basin and possibly in the southeastern Elk Point Basin, and provides the basis for provisional subdivision of Euramerican T-R cycle IIb into cycles IIb-1, and IIb-2.