WMS This service provides Estimates of Geological and Geophysical Surfaces (EGGS). The data comes from cover thickness models based on magnetic, airborne electromagnetic and borehole measurements of the depth of stratigraphic and chronostratigraphic surfaces and boundaries. Australia geology geophysics surfaces subsurface cover thickness cover model OZ SEEBASE 2021 depth to basement Geoscience Australia Client Services Postal

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ACT 2601 Australia +61 2 6249 9111 +61 2 6249 9999 clientservices@ga.gov.au NONE © Commonwealth of Australia (Geoscience Australia) 2023. This product is released under the Creative Commons Attribution 4.0 International Licence. http://creativecommons.org/licenses/by/4.0/legalcode text/xml image/png application/atom+xml application/geopackage+sqlite3 application/json;type=utfgrid application/pdf application/rss+xml application/vnd.google-earth.kml+xml application/vnd.google-earth.kml+xml;mode=networklink application/vnd.google-earth.kmz image/geotiff image/geotiff8 image/gif image/jpeg image/png; mode=8bit image/svg+xml image/tiff image/tiff8 image/vnd.jpeg-png image/vnd.jpeg-png8 text/html; subtype=openlayers text/html; subtype=openlayers2 text/html; subtype=openlayers3 text/plain application/vnd.ogc.gml text/xml application/vnd.ogc.gml/3.1.1 text/xml; subtype=gml/3.1.1 text/html application/json XML INIMAGE BLANK JSON This service provides Estimates of Geological and Geophysical Surfaces (EGGS). The data comes from cover thickness models based on magnetic, airborne electromagnetic and borehole measurements of the depth of stratigraphic and chronostratigraphic surfaces and boundaries. EPSG:3857 EPSG:4236 EPSG:4283 EPSG:3112 CRS:84 105.99999999999993 159.245 -50.500000038721865 -9.999999999536E-4 EPSG:4283 131.44852877642705 145.20588553339485 -24.84445117306149 -13.310009626869865 text/html text/plain eggs:BaseCenozoicPoints A web map service for estimates of geological and geophysical surfaces (EGGS) data. There are currently uncertainties for both the depths obtained from inclined boreholes and their spatial location. These are currently being looked into and will be resolved in future releases of the service. cenozoic cover thickness cover model Australia EPSG:4283 CRS:84 131.4885215 145.0963887 -24.78436695 -13.42161941 text/plain eggs:BaseCenozoicGrid This layer provides depth estimates to the chronostratigraphic layer Base Cenozoic as a gridded surface. The estimates are based on the interpretation, compilation and integration of borehole, solid geology, reflection seismic, and airborne electromagnetic data, as well as depth to magnetic source estimates. The grid was generated with a standard interpolation algorithm, i.e. minimum-curvature interpolation method. This surface provides a framework to assess the depth and possible spatial extent of resources, including basin-hosted mineral resources, basement-hosted mineral resources, hydrocarbons and groundwater, as well as an input to economic models of the viability of potential resource development. cenozoic cover thickness cover model grid Australia EPSG:4283 CRS:84 131.44852877642705 145.20588553339482 -24.84445115526811 -13.310009623541331 text/plain eggs:BaseMesozoicPoints A web map service for estimates of geological and geophysical surfaces (EGGS) data. There are currently uncertainties for both the depths obtained from inclined boreholes and their spatial location. These are currently being looked into and will be resolved in future releases of the service. cover thickness cover model mesozoic Australia EPSG:4283 CRS:84 131.4837462 144.6571657 -24.77968326 -13.39961907 text/plain eggs:BaseMesozoicGrid This layer provides depth estimates to the chronostratigraphic layer Base Mesozoic as a gridded surface. The estimates are based on the interpretation, compilation and integration of borehole, solid geology, reflection seismic, and airborne electromagnetic data, as well as depth to magnetic source estimates. The grid was generated with a standard interpolation algorithm, i.e. minimum-curvature interpolation method. This surface provides a framework to assess the depth and possible spatial extent of resources, including basin-hosted mineral resources, basement-hosted mineral resources, hydrocarbons and groundwater, as well as an input to economic models of the viability of potential resource development. mesozoic cover thickness cover model grid Australia EPSG:4283 CRS:84 131.44852877642705 145.20588553339482 -24.84445115526811 -13.310009623541331 text/plain eggs:BasePaleozoicPoints A web map service for estimates of geological and geophysical surfaces (EGGS) data. There are currently uncertainties for both the depths obtained from inclined boreholes and their spatial location. These are currently being looked into and will be resolved in future releases of the service. Australia cover thickness cover model paleozoic EPSG:4283 CRS:84 131.4882036 144.5924452 -24.78883683 -13.42687597 text/plain eggs:BasePaleozoicGrid This layer provides depth estimates to the chronostratigraphic layer Base Paleozoic as a gridded surface. The estimates are based on the interpretation, compilation and integration of borehole, solid geology, reflection seismic, and airborne electromagnetic data, as well as depth to magnetic source estimates. The grid was generated with a standard interpolation algorithm, i.e. minimum-curvature interpolation method. This surface provides a framework to assess the depth and possible spatial extent of resources, including basin-hosted mineral resources, basement-hosted mineral resources, hydrocarbons and groundwater, as well as an input to economic models of the viability of potential resource development. paleozoic cover thickness cover model grid Australia EPSG:4283 CRS:84 131.44852877642705 145.20588553339482 -24.84445115526811 -13.310009623541331 text/plain eggs:BaseNeoproterozoicPoints A web map service for estimates of geological and geophysical surfaces (EGGS) data. There are currently uncertainties for both the depths obtained from inclined boreholes and their spatial location. These are currently being looked into and will be resolved in future releases of the service. neoproterozoic cover thickness cover model Australia EPSG:4283 CRS:84 131.4882036 144.4888016 -24.77309045 -13.43936303 text/plain eggs:BaseNeoproterozoicGrid This layer provides depth estimates to the chronostratigraphic layer Base Neoproterozoic as a gridded surface. The estimates are based on the interpretation, compilation and integration of borehole, solid geology, reflection seismic, and airborne electromagnetic data, as well as depth to magnetic source estimates. The grid was generated with a standard interpolation algorithm, i.e. minimum-curvature interpolation method. This surface provides a framework to assess the depth and possible spatial extent of resources, including basin-hosted mineral resources, basement-hosted mineral resources, hydrocarbons and groundwater, as well as an input to economic models of the viability of potential resource development. neoproterozoic cover thickness cover model grid Australia EPSG:4283 CRS:84 131.44852877642705 145.20588553339482 -24.84445115526811 -13.310009623541331 text/plain eggs:Murray_Basin_Cenozoic_Thickness_Grid_2017 This grid represents the thickness of Cenozoic cover in the Murray Basin, generated in 2017 using a machine-learning approach where correlations between 17 supplementary datasets and 5436 depth estimates were used to derive a predictive model. A supervised learning algorithm known as Gaussian Process (GP) was used to generate the integrated predictive model. Depth estimates were compiled from: drillholes, reflection seismic profile interpretations, refraction seismic profiles and depth to magnetic basement estimates. Depth estimates were sourced from Geoscience Australia, the national Groundwater Information System database (http://www.bom.gov.au/water/groundwater/ngis/), the Geological Survey of Victoria (http://earthresources.vic.gov.au/earth-resources/geology-of-victoria/geological-survey-of-victoria) and the Geological Survey of South Australia (http://www.minerals.statedevelopment.sa.gov.au/geoscience/geological_survey). Supplementary datasets used in the model include gravity, magnetics and surface geology sourced from Geoscience Australia http://www.ga.gov.au/data-pubs/maps, and the 3 second (~90m) Shuttle Radar Topography Mission (SRTM) digital elevation model, https://pid.geoscience.gov.au/dataset/ga/72760. For more information see Wilford, J. 2017. Murray Basin Cenozoic thickness. Geoscience Australia, Canberra. https://pid.geoscience.gov.au/dataset/ga/111564. Murray Basin Cenozoic cover thickness grid EPSG:4326 CRS:84 138.18247215797473 148.87220910375524 -37.91036626066638 -29.803697717093332 text/html OZ SEEBASE depth‐to‐economic basement model of Australia and ancillary datasets. Data provided by Geognostics, 2021. OZ SEEBASE® 2021 (Version 1, May 2021). Geognostics Australia Pty Ltd, https://www.geognostics.com/oz‐seebase‐2021. OZ SEEBASE 2021 Depth To Basement Sediment Thickness Basement Thickness EPSG:4283 108.745 159.245 -50.20300003895196 -9.9999999996702E-4 eggs:OZSEEBASE_2021_Depth_to_Basement_Image_Geognostics RGB image of the OZ SEEBASE 2021 depth to basement grid rendered with a colour ramp and hill shading, as provided by Geognostics, 2021. OZ SEEBASE® 2021 (Version 1, May 2021). Geognostics Australia Pty Ltd, https://www.geognostics.com/oz‐seebase‐2021. OZSEEBASE 2021 Depth To Basement EPSG:4283 CRS:84 105.99999999999993 159.00099999999992 -50.500000038721865 -9.999999999536E-4 eggs:OZSEEBASE_2021_Depth_to_Basement_Grid_Geognostics OZ SEEBASE 2021 depth-to-basement grid. Basement is defined as the top of igneous or metamorphic crust at the base of undeformed sediments, regardless of age. Note that in deeper parts of some basins, such as the greater McArthur Basin, the deepest section maybe metasedimentary. Data provided by Geognostics, 2021. OZ SEEBASE® 2021 (Version 1, May 2021). Geognostics Australia Pty Ltd, https://www.geognostics.com/oz‐seebase‐2021. OZ SEEBASE 2021 Depth To Basement EPSG:4283 CRS:84 108.74500000000002 159.00099999999998 -50.20300003895196 -9.99999999967E-4 eggs:OZSEEBASE_2021_Sediment_Thickness_Grid_Geognostics Total sediment thickness grid calculated as the difference between basement from OZ SEEBASE 2021 (depth‐to‐basement) and the SRTM15 Plus v2.1 Digital Elevation Model. In a few areas of low resolution, shallow basement, or adjacent to steep slopes, the gridding can result in areas where basement appears to "overshoot" the surface. In these areas the sediment thickness has been set to zero. Data provided by Geognostics, 2021. OZ SEEBASE® 2021 (Version 1, May 2021). Geognostics Australia Pty Ltd, https://www.geognostics.com/oz‐seebase‐2021. OZ SEEBASE 2021 Sediment Thickness EPSG:4283 CRS:84 108.745 159.001 -50.203 -0.001 eggs:Derivative_OZSEEBASE_Sediment_Thickness_Grid OZ SEEBASE 2021 sediment thickness grid cropped and down-sampled for integration with the Economic Fairways Mapper. Original grid provided by Geognostics, 2021. OZ SEEBASE® 2021 (Version 1, May 2021). Geognostics Australia Pty Ltd, https://www.geognostics.com/oz‐seebase‐2021. OZ SEEBASE 2021 Sediment Thickness EPSG:4326 CRS:84 111.995 153.995 -44.005 -10.005000000000003 eggs:OZSEEBASE_2021_Basement_Thickness_Grid_Geognostics Basement thickness grid calculated using OZ SEEBASE 2021 and the AuSREM AusMoho 2017. Basement is defined as the top of igneous or metamorphic crust at the base of undeformed sediments, regardless of age. Note that in deeper parts of some basins, such as the greater McArthur Basin, the deepest section maybe metasedimentary. Data provided by Geognostics, 2021. OZ SEEBASE® 2021 (Version 1, May 2021). Geognostics Australia Pty Ltd, https://www.geognostics.com/oz‐seebase‐2021. OZ SEEBASE 2021 Basement Thickness EPSG:4283 CRS:84 108.745 159.245 -49.25 -4.75 eggs:AEM This layer delineates the depths to chronostratigraphic boundaries as interpreted from conductivity profiles derived from airborne electromagnetic (AEM) data. The layer incorporates multiple attributes including the following: a) Depth below ground surface b) The interpreted chronostratigraphic unit boundary c) Relative confidence of the depth estimate d) Confidence in the assigned stratigraphic units occurring above and below or at the depth location geophysics geophysical survey depth age confidence boundary stratigraphic AEM airborne electromagnetics Australia EPSG:4283 CRS:84 112.0 155.0 -45.0 -8.0 text/plain eggs:BoreholeDepthAges This layer delineates the depths to chronostratigraphic boundaries as measured from boreholes. The layer incorporates multiple attributes including the following: a) The borehole type b) Downhole depth to either chronostratigraphic boundary or to end of hole c) The Interpreted chronostratigraphic unit boundary d) Confidence in the assigned stratigraphic units occurring above and below the depth location boreholes confidence stratigraphic age boundary depth Australia EPSG:4283 CRS:84 112.0 155.0 -45.0 -8.0 eggs:DepthAgePoints This layer is a summary of all depth estimation methods. The layer incorporates multiple attributes including the following: a) The method type (including boreholes, airborne electromagnetic data, and magnetic spectral, Naudy-Automag and targeted magnetic inversion models) b) Depth below ground surface c) The interpreted chronostratigraphic unit boundary name d) Relative confidence of the depth value e) Confidence in the assigned stratigraphic units occurring above and below the depth location, or the stratigraphic unit in which the depth estimate is located. geophysics geophysical survey airborne digital data geophysical interpretation airborne electromagnetics (AEM) magnetism airborne magnetics seismology and seismic exploration seismic survey reflection seismic seismic section seismic velocity EPSG:4283 CRS:84 112.0 155.0 -45.0 -8.0 eggs:MagneticSpectral This layer delineates the depth to magnetic sources derived from windowed gridded magnetic data using Spector and Grant’s spectral method, where the power spectra have been corrected to account for the fractal distribution of magnetic sources. The layer incorporates multiple attributes, including: a) Depth below ground surface b) The interpreted chronostratigraphic unit boundary c) Relative confidence of the depth value d) Confidence in the assigned stratigraphic units occurring above and below the depth location, or within which the depth estimate is located. geophysics geophysical survey depth age confidence boundary stratigraphic magnetic spectral EPSG:4283 CRS:84 112.0 155.0 -45.0 -8.0 eggs:NaudyAutomag This layer delineates the depths to the top of magnetic bodies (below ground level) using the Naudy – Automag method. The layer incorporates multiple attributes including the following: a) Depth below ground surface b) The interpreted chronostratigraphic unit boundary c) Relative confidence of the depth estimate d) Confidence in the assigned stratigraphic units occurring above and below or at the depth location geophysics geophysical survey magnetism depth age confidence boundary stratigraphic magnetic naudy EPSG:4283 CRS:84 112.0 155.0 -45.0 -8.0 eggs:TargetedMagneticInversionModelling This layer delineates the depths to the top of magnetic bodies using the Targeted Magnetic Inversion Modelling (TMIM) method. The layer incorporates multiple attributes including the following: a) Depth below ground surface b) The interpreted chronostratigraphic unit boundary c) Relative confidence of the depth estimate d) Confidence in the assigned stratigraphic units occurring above and below or at the depth location geophysics geophysical survey airborne digital data geophysical interpretation magnetism airborne magnetics Australia EPSG:4283 CRS:84 112.0 155.0 -45.0 -8.0