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L024 Wandagee Hill/Middalya seismic reflection survey, WA, 1955

Created 16/10/2025

Updated 16/10/2025

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Middalya in the Carnarvon Basin, Western Australia, during October 1955 by the Bureau of Mineral resources. The object of the survey was to assist in interpreting gravity results in the region. Prior to this survey the interpretation of the geology suggested that the deepest part of the Palaeozoic basin was in the Wandagee Hill area, but gravity results indicated that a basement ridge may exist in this same area. The seismic results indicate a sedimentary thickness of at least 17,000 ft between Wandagee Hill and Middalya and possibly 24,000 ft thickness to the east of Middalya. Although no useful information was obtained in the immediate vicinity of Wandagee Hill, extrapolation of results from farther east, suggests that the basement may be as shallow as 6000 ft just west of Wandagee Hill. This would confirm the interpretation of the gravity results at this location. The seismic cross-section shows that there may be a large elevation of the basement over a region about 20 miles west of Middalya between Shot-points 90 and 113. Although there is no direct evidence of this in the gravity results, it may be related to faulting, particularly a fault four miles east of Middalya that is indicated both by surface geology and by gravity results.

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Field Value
Title L024 Wandagee Hill/Middalya seismic reflection survey, WA, 1955
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/8494bb02-2a24-443f-9599-41246590f2db
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 03/10/1955 - 05/11/1955
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        114.25,
        -24.0
      ],
      [
        115.0,
        -24.0
      ],
      [
        115.0,
        -23.75
      ],
      [
        114.25,
        -23.75
      ],
      [
        114.25,
        -24.0
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "L024 Wandagee Hill/Middalya seismic reflection survey, WA, 1955". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/l024-wandagee-hill-middalya-seismic-reflection-survey-wa-1955