气候变化领域集成服务门户(CCPortal): Conodont biostratigraphy and magnetic susceptibility of Upper Devonian Chattanooga Shale; eastern United States: Evidence for episodic deposition and disconformities

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DOI	10.1016/j.palaeo.2019.03.017
	Conodont biostratigraphy and magnetic susceptibility of Upper Devonian Chattanooga Shale; eastern United States: Evidence for episodic deposition and disconformities
	Over D.J.; Hauf E.; Wallace J.; Chiarello J.; Over J.-S.; Gilleaudeau G.J.; Song Y.; Algeo T.J.
发表日期	2019
ISSN	0031-0182
起始页码	137
结束页码	149
卷号	524
英文摘要	Recognition of stratigraphic hiatuses in fine-grained siliciclastic sedimentary rocks can be challenging but is feasible using high-resolution biostratigraphic and chemostratigraphic data within a regional correlation framework. In this case study of the Upper Devonian Chattanooga Shale in the Dupont GHS drillcore from the western margin of the Nashville Dome, the Upper Devonian Chattanooga Shale comprises several depositional units separated by intraformational hiatuses. These features are developed within a 13.3 m interval consisting of 4.2 m of Frasnian strata and 9.1 m of Famennian strata that unconformably overlie the Sellersburg Formation. Three Frasnian, seven Famennian, and one Tournaisian conodont biozones are recognized. The Frasnian-Famennian boundary is on a disconformity. To the northeast in the southern Illinois Basin, the New Albany Shale in the BCC drillcore consists of 35 m of Givetian and Frasnian strata and 30 m of Famennian strata that conformably overlie the Sellersburg Formation. One Givetian, four Frasnian, and three of the four lowest Famennian conodont zones are recognized. The Frasnian-Famennian boundary is conformable and constrained to within a 5 cm interval. Bulk magnetic susceptibility (MS) shows a long-term increase through most of the Frasnian. Shorter-term MS trends were observed in association with depositional pulses linked to global sea-level rises and highstand system tracts, characterized by total organic carbon (TOC) maxima — eight trends were resolved in the DGHS core, and six in the BCC. The high-frequency shifts in δMS likely represent Milankovitch-band sea-level and depositional cycles at a scale that cannot be resolved based on the condensed and irregular nature of the depositional packages. Gamma ray counts in the DGHS peak in association with the eight depositional cycles, with a TOC peak at the base of each cycle. © 2019 Elsevier B.V.
英文关键词	Famennian; Frasnian; Kellwasser; Nashville Dome; New Albany Shale; Ohio Shale
语种	英语
scopus关键词	biostratigraphy; biozonation; chemostratigraphy; conodont; depositional environment; Devonian; Famennian; Frasnian; hiatus; highstand; magnetic susceptibility; sea level change; sedimentary rock; siliciclastic deposit; Albany [New York]; Chattanooga; Illinois Basin; Nashville; New York [United States]; Ohio; Tennessee; United States
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150973
作者单位	Department of Geological Sciences, SUNY-Geneseo, Geneseo, NY 14454, United States; Earth and Ocean Sciences, University of Victoria, Victoria, British Columbia V8P 5C2, Canada; Department of Atmospheric, Oceanic, and Earth Sciences, George Mason University, Fairfax, VA 22030, United States; Department of Geology, University of Cincinnati, Cincinnati, OH 45221, United States; State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, 430074, China; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, 430074, China
推荐引用方式 GB/T 7714	Over D.J.,Hauf E.,Wallace J.,et al. Conodont biostratigraphy and magnetic susceptibility of Upper Devonian Chattanooga Shale; eastern United States: Evidence for episodic deposition and disconformities[J],2019,524.
APA	Over D.J..,Hauf E..,Wallace J..,Chiarello J..,Over J.-S..,...&Algeo T.J..(2019).Conodont biostratigraphy and magnetic susceptibility of Upper Devonian Chattanooga Shale; eastern United States: Evidence for episodic deposition and disconformities.Palaeogeography, Palaeoclimatology, Palaeoecology,524.
MLA	Over D.J.,et al."Conodont biostratigraphy and magnetic susceptibility of Upper Devonian Chattanooga Shale; eastern United States: Evidence for episodic deposition and disconformities".Palaeogeography, Palaeoclimatology, Palaeoecology 524(2019).