Middle-Upper Devonian relative sea level histories of central and western North American interior basins
- Illinois State Univ., Normal, IL (United States). Dept. of Geography and Geology
- Geological Survey of Canada, Calgary, Alberta (Canada)
- Iowa Dept. of Natural Resources, Iowa City, IA (United States). Geological Survey Bureau
New 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.
- OSTI ID:
- 6975434
- Report Number(s):
- CONF-9404217-; CODEN: GAAPBC
- Journal Information:
- Geological Society of America, Abstracts with Programs; (United States), Vol. 26:5; Conference: 27. annual conference of the North-Central Section of the Geological Society of America (GSA), Kalamazoo, MI (United States), 28-29 Apr 1994; ISSN 0016-7592
- Country of Publication:
- United States
- Language:
- English
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