From Geoscience Australia
JSON format icon JSON RDF format icon RDF ISO19115-3 XML

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

Created 16/10/2025

Updated 16/10/2025

JSON format icon JSON RDF format icon RDF ISO19115-3 XML

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.

Files and APIs

Tags

Additional Info

Field Value
Title Permo-Triassic stratigraphy and sedimentation in the Bowen Basin, Queensland
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/57a7b2bf-9d25-4191-aea0-64b210159572
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        137.0,
        -28.5
      ],
      [
        149.5,
        -28.5
      ],
      [
        149.5,
        -10.0
      ],
      [
        137.0,
        -10.0
      ],
      [
        137.0,
        -28.5
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Permo-Triassic stratigraphy and sedimentation in the Bowen Basin, Queensland". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/permo-triassic-stratigraphy-and-sedimentation-in-the-bowen-basin-queensland