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The late Paleozoic ice age; a review of current understanding and synthesis of global climate patterns

Christopher R. Fielding, Tracy D. Frank and John L. Isbell
The late Paleozoic ice age; a review of current understanding and synthesis of global climate patterns (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: 343-354

Abstract

The conventional view of the late Paleozoic ice age is that it was a single long, protracted event some tens of millions of years in duration, with some internal waxing and waning of glacial ice masses. Recent research, however (much of it summarized in this volume), favors an alternative view that the late Paleozoic ice age was a series of shorter (1-8 m.y. duration), discrete glacial events separated by periods of warmer climate. Stratigraphic records show that the late Paleozoic ice age began with probably short-lived, localized glacial events in South America at the Late Devonian-Tournaisian boundary and in the Visean. These "precursor" events were followed at the start of the Serpukhovian (start of Namurian, latest Mississippian) by expansion of ice into other areas of Gondwana. corresponding to the commencement of the distinctive cyclothemic stratigraphy of paleotropical Euramerica. At the start of the Bashkirian (earliest Pennsylvanian), ice expanded further across South America, southern Africa, and Australia, and at the start of the Moscovian (early Pennsylvanian), into southern Africa, Oman, and Arabia. In the latter half of the Pennsylvanian, some evidence points toward climatic amelioration, although ice centers undoubtedly continued to occur. A massive expansion of ice occurred at the Pennsylvanian-Permian boundary, and glaciation became bipolar at that time. Ice sheets are inferred to have been at their maximum extent during the Asselian and early Sakmarian, after which they decayed rapidly over much of Gondwana. Glaciation continued, intermittently, in Australia and Siberia throughout the late Early and Middle Permian. While major events appear to have been synchronized globally, the timing of individual (1-8-m.y-long) glaciations may have been asynchronous across Gondwana, producing a composite eustatic signal in far-field, cyclothem records.


ISSN: 0072-1077
EISSN: 2331-219X
Coden: GSAPAZ
Serial Title: Special Paper - Geological Society of America
Serial Volume: 441
Title: The late Paleozoic ice age; a review of current understanding and synthesis of global climate patterns
Title: Resolving the late Paleozoic ice age in time and space
Author(s): Fielding, Christopher R.Frank, Tracy D.Isbell, John L.
Author(s): Fielding, Christopher R.editor
Author(s): Frank, Tracy D.editor
Author(s): Isbell, John L.editor
Affiliation: University of Nebraska Lincoln, Department of Geosciences, Lincoln, NE, United States
Affiliation: University of Nebraska Lincoln, Department of Geosciences, Lincoln, NE, United States
Pages: 343-354
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: 68
Accession Number: 2008-123142
Categories: Stratigraphy
Document Type: Serial Conference document
Bibliographic Level: Analytic
Annotation: NSF Grant ANT-0533082
Illustration Description: illus.
S35°00'00" - N37°00'00", W18°00'00" - E51°00'00"
S90°00'00" - S61°00'00", W180°00'00" - E180°00'00"
N50°00'00" - N80°00'00", W170°00'00" - E60°00'00"
Secondary Affiliation: University of Wisconsin Milwaukee, USA, United StatesUniversity 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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