Authors / CoAuthors
Brakel, A.T.
Abstract
Eustatic changes in sea level can be used to correlate sequences in widely separated areas. Thick terrestrial sequences with marine intercalations are especially suitable, provided the marine beds are not the result of tectonic subsidence. The method has been used to correlate Late Permian coal measures in the Sydney, Gunnedah, and Bowen Basins. The Dempsey Formation and its equivalents in the Sydney Basin, an unnamed correlative in the Gunnedah Basin, and the Black Alley Shale and MacMillan Formation in the Bowen Basin have been identified as being deposited during the same eustatic highstand, a result consistent with palynological conclusions. The Kulnura Marine Tongue (Sydney Basin) and the lower Burngrove Formation (Bowen Basin), on the other hand, owe their origin to tectonism. The correlations indicate that deposition of Late Permian coal measures began in the Bowen Basin later than in the Sydney and Gunnedah Basins, a conclusion that appears to be supported by marine macrofossil studies.
Product Type
document
eCat Id
81201
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Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
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Keywords
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- GA PublicationJournal
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- NSWQLD
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_External
Publication Date
1986-01-01T00:00:00
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Topic Category
geoscientificInformation
Series Information
BMR Journal of Australian Geology and Geophysics 10:1:17-22
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Unknown
Parent Information
Extents
[-35.81, -17.55, 144.13, 154.24]
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Spatial Resolution
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