From Geoscience Australia
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Inferred Base of Nulla Basalt

Created 16/10/2025

Updated 16/10/2025

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This is a raster representing the base surface of the Nulla Basalt Province, inferred from sparse data available, dominated by private water bore records. This interpretation was conducted by a hydrogeologist from Geoscience Australia.

Caveats • This is just one model, based on sparse data and considerable palaeotopographic interpretation • This model relies on the input datasets being accurate. However it is noted that substantial uncertainty exists both in the location of private bores and the use of drillers’ logs for identifying stratigraphic contacts. • The location of palaeothalwegs is imprecise, and often it is only indicative of the presence of a palaeovalley. • The purpose of this model is for visualisation purposes, so should not be considered a definitive depth prediction dataset.

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Additional Info

Field Value
Title Inferred Base of Nulla Basalt
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/dd3978fd-582e-4194-8a0c-1158243fc271
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        144.5,
        -20.25
      ],
      [
        146.35,
        -20.25
      ],
      [
        146.35,
        -19.3
      ],
      [
        144.5,
        -19.3
      ],
      [
        144.5,
        -20.25
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Inferred Base of Nulla Basalt". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/inferred-base-of-nulla-basalt