{ "culture": "en-US", "name": "", "guid": "", "catalogPath": "", "snippet": "Base of Cenozoic surface layer group file with derived contours, hillshaded images, and the Cenozoic cover extent within the Kati Thanda \u2013 Lake Eyre Basin (KT\u2013LEB) project area and the Cooper Creek floodplain. Height reference is relative to the Australian Height Datum (m AHD).", "description": "

Base of Cenozoic surface layer group includes geological formation surfaces with hill-shaded images, contours, and a Cenozoic cover extent polygon derived from 1M surface geology (Raymond et al. 2012). <\/SPAN><\/SPAN><\/P>

Base of Cenozoic surfaces were produced as part of the Cenozoic geology, hydrogeology and groundwater systems of Kati Thanda - Lake Eyre Basin study for the National Groundwater Systems project (Evans et al. 2024) to provide an update on and inform the regional Cenozoic geological framework. <\/SPAN><\/SPAN><\/P>

The Base of Cenozoic models were developed through the integration of a variety of geoscience datasets including down-hole stratigraphic picks from wells and drillholes, biostratigraphic data, petrophysical data from drillholes, interpreted geophysical data such as airborne electromagnetics (AEM), and 1-million scale surface geology mapping. The borehole stratigraphic picks and palynological data that underpin the models were compiled in Vizy and Rollet (2024), Norton and Rollet (2023) and Hannaford and Rollet (2023).<\/SPAN><\/SPAN><\/P>

Evans et al (2024) provided details on the distribution of bore data points. The accuracy of the geological surfaces (and resultant contours) are less reliable in areas where the density of data points are low, such as along the western margin of the KT\u2013LEB in the NT and SA. <\/SPAN><\/SPAN><\/P>

Collating additional information from mineral exploration bores drilled in this region would likely help increase confidence and reliability. Recently, legacy seismic reflection data, were reprocessed and interpreted over Pedirka and western Eromanga basins. (Bernecker et al. 2024, Bradshaw et al. 2024), which underlies the Tirari Sub-basin. The results of this work were published after the geological modelling of the KT-LEB and were thus unable to be incorporated. Future updates to the base of Cenozoic geological model developed for this investigation would benefit from the inclusion of results from these new seismic interpretations.<\/SPAN><\/SPAN><\/P><\/DIV>", "summary": "Base of Cenozoic surface layer group file with derived contours, hillshaded images, and the Cenozoic cover extent within the Kati Thanda \u2013 Lake Eyre Basin (KT\u2013LEB) project area and the Cooper Creek floodplain. Height reference is relative to the Australian Height Datum (m AHD).", "title": "BaseCenozoic sediments", "tags": [ "Geological models", "Base of Cenozoic", "Lake Eyre geological basin", "stratigraphy", "Lake Eyre", "Lake Frome", "Cooper Creek", "Cooper Creek Palaeovalley" ], "type": "", "typeKeywords": [], "thumbnail": "", "url": "", "minScale": 0, "maxScale": 0, "spatialReference": "", "accessInformation": "© Commonwealth of Australia (Geoscience Australia) 2026. This product is released under the Creative Commons Attribution 4.0 International Licence. http://creativecommons.org/licenses/by/4.0/legalcode", "licenseInfo": "

© Commonwealth of Australia (Geoscience Australia) 2026. This product is released under the Creative Commons Attribution 4.0 International Licence. http://creativecommons.org/licenses/by/4.0/legalcode<\/SPAN><\/P><\/DIV>" }