气候变化领域集成服务门户(CCPortal): Revised sequence stratigraphy of the upper Katian Stage (Cincinnatian) strata in the Cincinnati Arch reference area: Geological and paleontological implications

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DOI	10.1016/j.palaeo.2019.109483
	Revised sequence stratigraphy of the upper Katian Stage (Cincinnatian) strata in the Cincinnati Arch reference area: Geological and paleontological implications
	Brett C.E.; Aucoin C.D.; Dattilo B.F.; Freeman R.L.; Hartshorn K.R.; McLaughlin P.I.; Schwalbach C.E.
发表日期	2020
ISSN	0031-0182
卷号	540
英文摘要	The Upper Ordovician Cincinnatian Series is a critical upper Katian reference succession. Previously, six 3rd-order depositional sequences (C1 to C6) have been recognized and frequently used as regional time slices. Recent research, however, indicates a need for revision and additions, including the recognition of additional 3rd- and 4th-order sequences. We propose amendments based upon high-resolution correlations using a combination of regional disconformities, cycle stacking patterns, bioevents, marker beds, and chemostratigraphy. Several disconformities, including a large regionally angular mid-Richmondian unconformity, are newly recognized or reinterpreted. In addition, distinctive depositional patterns aid in the recognition of systems tracts, with a) thick proximal laminated peritidal facies representing early transgressive systems tracts (TSTs) or lowstands, in part (LSTs), b) shell-rich limestone packages representing later TSTs and overlain by c) more shale-prone highstand systems tracts (HSTs), themselves overlain locally by d) siliciclastic dominated falling stage systems tract (FSST) deposits that are commonly removed beneath substantial unconformities (sequence boundaries). At present, we recognize eight 3rd-order Cincinnatian sequences, designated C1 through C8, and 16 4th-order subdivisions and their component systems tracts. A younger (Hirnantian?) sequence may be present at some localities as the enigmatic Centerville Formation and/or basal Belfast Member of the Brassfield Formation. The implications of these new correlations and sequence interpretations include a new standard for relative sea-level changes and insights into basin dynamics. This framework also permits a more nuanced history of biotic changes that include geologically brief pulses of immigration associated with the transgressions of the C1 (lower Kope Formation), C5C (Clarksville Member of Waynesville Formation), and C7A (basal Whitewater Formation). © 2019 Elsevier B.V.
英文关键词	Bioevents; Epiboles; Ordovician; Richmondian invasion; Sequence stratigraphy; Unconformity
语种	英语
scopus关键词	depositional sequence; limestone; Ordovician; sequence stratigraphy; stacking; systems tract; unconformity; Belfast [Belfast (DST)]; Belfast [Northern Ireland]; Cincinnati; Northern Ireland; Ohio; United Kingdom; United States; Cincinnatia
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/150632
作者单位	Department of Geology, University of Cincinnati, Cincinnati, OH 45221, United States; Department of Biology, Purdue University Fort Wayne, Fort Wayne, IN 46805, United States; Department of Earth and Environmental Sciences, University of Kentucky, Lexington, KY 40506, United States; Dry Dredgers, Cincinnati, OH 45011, United States; Indiana Geological and Water Survey, Indiana University, Bloomington, IN 47405, United States; Cincinnati Museum Center, Geier Center, 1301 Western Avenue, Cincinnati, OH 45203, United States
推荐引用方式 GB/T 7714	Brett C.E.,Aucoin C.D.,Dattilo B.F.,et al. Revised sequence stratigraphy of the upper Katian Stage (Cincinnatian) strata in the Cincinnati Arch reference area: Geological and paleontological implications[J],2020,540.
APA	Brett C.E..,Aucoin C.D..,Dattilo B.F..,Freeman R.L..,Hartshorn K.R..,...&Schwalbach C.E..(2020).Revised sequence stratigraphy of the upper Katian Stage (Cincinnatian) strata in the Cincinnati Arch reference area: Geological and paleontological implications.Palaeogeography, Palaeoclimatology, Palaeoecology,540.
MLA	Brett C.E.,et al."Revised sequence stratigraphy of the upper Katian Stage (Cincinnatian) strata in the Cincinnati Arch reference area: Geological and paleontological implications".Palaeogeography, Palaeoclimatology, Palaeoecology 540(2020).