Permo-Triassic stratigraphy and sedimentation in the Bowen Basin, Queensland

Part of the Permo-Triassic succession in the Bowen Basin consists of coal measures (Blackwater Group) overlain by a redbed sequence (Rewan Group) and a sequence composed essentially of quartz-rich sandstone (Clematis Group). The succession attains a maximum thickness of 3500 m. This study discusses the stratigraphy and controls of sedimentation, mainly from observations in the northern half of the basin. The coal measures were formed at the close of the Permian when earth movements created a rapidly subsiding intermontane basin, possibly with an internal drainage system. The Rewan Group was laid down in the same drainage basin in a system of meandering and anastomosing channels, in response to a decreased rate of subsidence relative to the rate of supply of sediment. The red colour of the mudstone is due to the presence of finely divided hematite derived from red soils in the source area. When the rate of sediment supply exceeded the rate of subsidence, a major reorganization of the drainage system took place, together with a general increase in stream gradients as sandy sediment accumulated along the margin of the basin. Changes of relief in the source area, and in the type of vegetation, local climate, and rates of erosion and subsidence, led to podsolic weathering in both the source area and at the site of deposition; fossil soil profiles can now be recognized by the application of micropedological analysis to the mottled red and green mudstone of the basal part of the Clematis Group. The newly established system of braided and meandering channels spread sand from the northern and southwestern parts of the area towards the southeast, where the rate of subsidence was greatest.

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Date (Publication)
1975-01-01T00:00:00
Citation identifier
Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/97

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Role Organisation / Individual Name Details
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Bureau of Mineral Resources, Geology and Geophysics

 Canberra
Author

Jensen, A.R.

 1
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Bulletin

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154

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Commonwealth of Australia (Geoscience Australia)
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Commonwealth of Australia (Geoscience Australia)

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  • Geoscientific information

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Product data repository: Various Formats

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Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes

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  • GA Publication

  • Bulletin

Theme

  • geology

Theme

  • stratigraphy

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  • AU-QLD

Australian and New Zealand Standard Research Classification (ANZSRC)

  • Earth Sciences

Keywords

  • Published_External

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Creative Commons Attribution 4.0 International Licence

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CC-BY

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4.0

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http://creativecommons.org/licenses/

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License

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Australian Government Security ClassificationSystem

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2018-11-01T00:00:00
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https://www.protectivesecurity.gov.au/Pages/default.aspx

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Unclassified
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English
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UTF8

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Commonwealth of Australia (Geoscience Australia)

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OnLine resource

Download the Bulletin (pdf)

Download the Bulletin (pdf)

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  • pdf

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Non geographic dataset
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GA Publication

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Title

Australian Government Security ClassificationSystem

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified

Metadata

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urn:uuid/a05f7892-b346-7506-e044-00144fdd4fa6

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GeoNetwork UUID

Language
English
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UTF8
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Commonwealth of Australia (Geoscience Australia)

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Document
Name

Legacy AGSO BMR Bulletins

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Geoscience Australia - short identifier for metadata record with

uuid

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eCatId/97

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https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/a05f7892-b346-7506-e044-00144fdd4fa6

Date info (Revision)
2018-04-20T06:02:30
Date info (Creation)
1996-10-29T00:00:00

Metadata standard

Title

AU/NZS ISO 19115-1:2014

Metadata standard

Title

ISO 19115-1:2014

Metadata standard

Title

ISO 19115-3

Title

Geoscience Australia Community Metadata Profile of ISO 19115-1:2014

Edition

Version 2.0, September 2018

Citation identifier
https://pid.geoscience.gov.au/dataset/ga/122551

 
 

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geology stratigraphy

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