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The record of Carboniferous sea-level change in low-latitude sedimentary successions from Britain and Ireland during the onset of the late Paleozoic ice age

Sarah J. Davies
The record of Carboniferous sea-level change in low-latitude sedimentary successions from Britain and Ireland during the onset of the late Paleozoic ice age (in Resolving the late Paleozoic ice age in time and space, Christopher R. Fielding (editor), Tracy D. Frank (editor) and John L. Isbell (editor))
Special Paper - Geological Society of America (2008) 441: 187-204

Abstract

The Carboniferous basins of Britain and Ireland were part of a shallow epicontinental seaway. Widespread shallow- and marginal-marine conditions during the Asbian and Brigantian are recorded by mixed carbonate and siliciclastic deposits across northern Britain. Further south, carbonate successions developed on the platforms and shelves of England, Wales, and southern Ireland. Distinctive changes in the stacking pattern of the cycles defined from these successions at different locations suggest regional transgressions in the Asbian during a period of high global temperatures. In the mid-Brigantian, a marine transgression reduced deposition on the carbonate platforms and flooded the Midland Valley of Scotland, connecting previously separate subbasins. During the latest Mississippian (Namurian), the-first extensive Southern Hemisphere glacigenic deposits broadly coincide with a positive shift in the carbon and oxygen stable isotope record and a transition to a humid climate in paleotropical latitudes. At this time across Britain and Ireland, siliciclastic fluvial, deltaic, and deep-water deposition dominated, and extensive peat mires developed in Scotland. Large-scale multistory fluvial systems (several tens of kilometers in width and tens of meters in thickness) incised into marine and deltaic deposits during periods of low eustatic sea level, and widespread marine bands are interpreted as eustatic sealevel rises. During the Westphalian, extensive peat mires developed on low-gradient waterlogged depositional plains. The presence of several widespread Westphalian marine bands suggests that significant eustatic rises led to extensive transgressions of this largely nonmarine environment. In the Asbian and Brigantian, eustatic sea-level changes were probably of lower magnitude during a period of higher global temperatures. During the early Namurian, the shift to a much cooler global climate provided a mechanism for generating higher-magnitude and higher-frequency eustatic changes as ice sheets waxed and waned.


ISSN: 0072-1077
EISSN: 2331-219X
Coden: GSAPAZ
Serial Title: Special Paper - Geological Society of America
Serial Volume: 441
Title: The record of Carboniferous sea-level change in low-latitude sedimentary successions from Britain and Ireland during the onset of the late Paleozoic ice age
Title: Resolving the late Paleozoic ice age in time and space
Author(s): Davies, Sarah J.
Author(s): Fielding, Christopher R.editor
Author(s): Frank, Tracy D.editor
Author(s): Isbell, John L.editor
Affiliation: University of Leicester, Department of Geology, Leicester, United Kingdom
Affiliation: University of Nebraska Lincoln, Department of Geosciences, Lincoln, NE, United States
Pages: 187-204
Published: 2008
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
ISBN: 978-0-8137-2441-6
Meeting name: Late Paleozoic ice age; toward a more refined understanding of timing, duration, and character
Meeting location: Salt Lake City, UT, USA, United States
Meeting date: 20050821Oct. 21, 2005
References: 126
Accession Number: 2008-123131
Categories: Stratigraphy
Document Type: Serial Conference document
Bibliographic Level: Analytic
Illustration Description: illus. incl. strat. cols., sect.
N50°00'00" - N59°00'00", W08°00'00" - E01°30'00"
N51°30'00" - N55°19'60", W10°30'00" - W06°30'00"
Secondary Affiliation: University of Wisconsin Milwaukee, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 200847
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