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Sedimentological record of the late Paleozoic glaciation in Queensland, Australia

Andrew T. Jones and Christopher R. Fielding
Sedimentological record of the late Paleozoic glaciation in Queensland, Australia
Geology (Boulder) (February 2004) 32 (2): 153-156

Abstract

Although much is known of the timing, geographical extent, and character of the late Paleozoic Gondwanan glaciation, its record in eastern Australia is poorly resolved. Some previous investigations have asserted that large parts of Australia were covered by a cold-based continental ice sheet during the Pennsylvanian (late Carboniferous). New data from Queensland in northeast Australia reported herein, however, suggest that the glaciation there was restricted to discrete, short-lived periods, in the Namurian (315 Ma), Westphalian (311 Ma), and Sakmarian (289-293 Ma). Thick successions in three widely separated areas indicate that the glaciation was confined in each case to local (valley or mountain) glaciers and that the mainly proglacial sediments were enclosed in every case by substantial intervals of fluvial, lacustrine, and shallow-marine strata deposited under nonglacial conditions. Accordingly, we submit that the cessation of glacial sediment deposition elsewhere in Gondwana during the Pennsylvanian to earliest Permian was due to the decay of glaciers, rather than to a transition to a cold-based ice sheet or sheets, as has been previously suggested. The interpretations presented herein make a significant contribution toward constraining the size and extent of glaciation in Gondwana, which has major implications for late Paleozoic world climate and sea-level fluctuations.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 32
Serial Issue: 2
Title: Sedimentological record of the late Paleozoic glaciation in Queensland, Australia
Affiliation: Geoscience Australia, Canberra, Australia
Pages: 153-156
Published: 200402
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 22
Accession Number: 2004-021722
Categories: StratigraphySedimentary petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: strat. col., 1 table, sketch map
Secondary Affiliation: University of Nebraska, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 200407
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