This web service provides access to geological, hydrogeological and hydrochemical digital datasets that have been published by Geoscience Australia for the Great Artesian Basin (GAB).

This web service provides access to geological, hydrogeological and hydrochemical digital datasets that have been published by Geoscience Australia for the Great Artesian Basin (GAB).

This report presents the results of an assessment of geoscience data and tools applied in the eastern Eromanga Basin to improve the hydrogeological conceptualisations. The assessment is one component of the Australian Government funded project ‘Assessing the Status of Groundwater in the Great Artesian Basin’. The results demonstrate that the application of existing and new geoscientific data and technologies has the potential to further improve our understanding of the Great Artesian Basin (GAB) hydrogeological system thus supporting the responsible management of basin water resources. Hydrogeological synthesis using airborne electromagnetic data, in conjunction with hydro- and chrono-stratigraphic data and well geological information, are effective at mapping the three dimensional distribution of the aquifers and aquitards. The results lead to an improved understanding of groundwater intake bed geometry, potential connectivity between aquifers, possible structural controls on groundwater flow paths, and plausible source of groundwater discharging as springs. In the southern part of the study area, the dominantly shale-rich Evergreen Formation is electrically conductive, but is locally resistive in places due to sand-rich facies. These areas allow hydraulic connectivity between the overlying and underlying Hutton and Precipice sandstone aquifers. Anticlinal folds and juxtaposed strata are observed on AEM traverses along the strike of the aquifer units, and includes the Hutton, Adori and Cadna-owie – Hooray sandstones. Abrupt folding and juxtaposed strata were interpreted as fault zones. Both structural features have the potential of controlling groundwater flow directions or groundwater storage compartmentalisation. The northern limits of Precipice Sandstone and Evergreen Formation are at Blackall and south of Barcaldine towns respectively. This zone also coincides with the southern edge of the east-west trending sub-surface Barcaldine Ridge where the basal Jurassic sequence abut against. On and north of the Barcaldine Ridge, the Cadna-owie – Hooray, Adori and Hutton sandstones are present. Mapping using AEM conductivity sections affirm that the Hutton Sandstone is the major aquifer in the northern part of the study area. The Poolowanna Formation, an age equivalent to the Evergreen Formation and Precipice Sandstone, is laterally extensive towards the northern part of the study area. This formation crops-out west of Lake Buchanan in the Great Dividing Range, but forms sub-crops elsewhere along the groundwater recharge areas. Numerous groundwater springs and spring clusters are present along the east and west of the outcropping sandstone hills in the Great Dividing Range. In the northern parts of the study area, source of groundwater for the springs are mainly derived from the Hutton Sandstone aquifers through either gravity-feed or lateral groundwater flow process. Polygonal faults mainly occur on conductive and fined-grained sedimentary units of the Rolling Downs Group. There is lack of observable evidence from AEM conductivity sections on the presence of polygonal faults to suggest preferential groundwater flows along these potential hydraulic conduits. Further investigation using ground based methods are needed to establish the presence of the faults and their hydraulic properties.

Groundwater from the Great Artesian Basin (GAB) is a vital resource for pastoral, agricultural and extractive industries, as well as for town water supplies, supporting at least $12.8 billion in economic activity annually (Frontier Economics, 2016). It is an essential resource that supports Indigenous cultural values and sustains a range of groundwater-dependent ecosystems. The complex nature and large size of the GAB, in conjunction with increasing and competing demands for water to support new or expanding industries, communities and the environment, present complex challenges for the long-term management of the basin’s groundwater resources. Although considerable research has previously been undertaken to improve our understanding of the GAB groundwater systems, in large part by the individual jurisdictions, current knowledge varies across the basin, and there remain major hydrogeological knowledge gaps that limit management of groundwater resources in the GAB. A key challenge is to manage the groundwater resource in a way that protects existing values, accounting for inflows and outflows for the basin and ensures long-term access to artesian groundwater. The project ‘Assessing the Status of Groundwater in the Great Artesian Basin’ (referred to as the ‘Project’), was funded by the Australian Government through offsets from the former National Water Infrastructure Development Fund. Work under the Project is informing the Science Program of the National Water Grid Authority. The Project assessed existing and new geoscientific data and technologies, including satellite data, to improve our understanding of the groundwater system and water balance in the GAB, with focus areas in the northern Surat Basin (Queensland) and western Eromanga Basin (South Australia). This Project has revised and updated fundamental aspects of the GAB hydrogeological system understanding to underpin ongoing groundwater assessments and to guide water policy and resource planning in the basin. - Hydrogeological framework An updated classification of GAB aquifers and aquitards was produced, linking the hydrostratigraphic classification used in Queensland (Surat Basin) with that used in South Australia (western Eromanga Basin). This updated hydrogeological framework was produced at the whole-of-GAB scale, through the development and application of an integrated basin analysis workflow, resulting in an updated whole-of-GAB stratigraphic interpretation, consistent across jurisdictional boundaries. A total of 19 updated geological and hydrogeological surfaces were generated and used to produce a new three-dimensional hydrogeological model of the GAB. - Groundwater recharge estimation Regional groundwater recharge volumes were revised for aquifer outcrop areas along the entire eastern GAB recharge area using an improved groundwater recharge rate mapping method, integrating chloride concentration in groundwater, rainfall, soil clay content, vegetation type and surficial geology. The modelled 50th percentile (‘median’) of new groundwater recharge rate estimates, for the eastern GAB intake beds, range spatially from 0.79 mm/yr to 458.64 mm/yr, with a mean of 15 mm/yr. The modelled groundwater recharge rate output maps are subject to uncertainty. Using 1000 model replicates, the 5th percentile groundwater recharge rate map ranges from 0.06 mm/yr to 349.73 mm/yr (mean of 9 mm/yr) and the 95th percentile groundwater recharge rate map ranges from 1.19 mm/yr to 678.48 mm/yr (mean of 26 mm/yr). Groundwater recharge flow pathways into the main GAB aquifers were assessed using groundwater sample hydrochemical and environmental tracer analyses. Significant revisions to the mapped geometry and heterogeneity of the groundwater recharge beds were made using regional scale airborne electromagnetic (AEM) geophysical data, which identified the geometry of and potential connectivity between aquifers, possible structural controls on groundwater flow paths and plausible groundwater sources of spring discharge. - Groundwater system conceptualisation Revised groundwater system conceptual models of groundwater recharge processes and groundwater flow were developed. These revised groundwater system conceptualisations illustrate aquifer architecture and potential stratigraphic and/or structural variability which has the potential to affect groundwater flow paths. - Water balance estimates The water balance presented here has been undertaken to test incorporating and communicating uncertainty estimates as part of a whole-of-GAB water balance. The water balance incorporates new work, where available, from the jurisdictions and from this project (specifically groundwater recharge estimates). This project has produced quantified uncertainty for a single component of the water balance - groundwater recharge, the largest input component of the water balance. The water balance, as presented in this report, is not intended to represent a comprehensive critical appraisal of the techniques used by previous workers to estimate each element of the water balance, nor was it intended to develop new techniques for the estimation of the water balance elements other than groundwater recharge. The incorporation of a component of the uncertainty in the water balance of the GAB is new. The uncertainty in the water balance has always been there, in all past iterations, though it has not been quantified. This estimation of uncertainty is important in the communication of the water balance, as it highlights key issues such as: 1) a whole-of-basin water balance for the GAB using current information is not sufficiently detailed to be of use to water managers; and 2) local monitoring of groundwater levels and pressures remains the primary management tool for monitoring groundwater resources in the GAB. The Project produced a point-in-time assessment of the water balance of the GAB, comparing inflows (including long-term average groundwater recharge) and outflows to the main regional aquifers, for the year 2019 (The year 2019 was the latest year for which data was available at the start of the Project). The whole-of-GAB water balance, calculated using the 5th, 50th and 95th percentiles of modelled groundwater recharge rates, estimates a range of storage change volumes of -859 GL, -29 GL and +1,212 GL respectively, in 2019. The large variation in estimated storage volumes, ranging from a decreasing to increasing groundwater storage change, highlights the large uncertainty associated with the water balance when considering the groundwater recharge rate uncertainty. GAB sub-basin water balances also show a range of groundwater storage volume changes based on modelled groundwater recharge rates for the Eromanga Basin (-229 GL 5th percentile; 51 GL 50th percentile and 424 GL 95th percentile), Carpentaria Basin (-413 GL 5th percentile; -72 GL 50th percentile and 511 GL 95th percentile) and Surat Basin (-217 GL 5th percentile; -9 GL 50th percentile and 277GL 95th percentile). Using 50th percentile modelled groundwater recharge rates for major aquifer groups across the basin, water balance estimates for the Cadna-owie Aquifer Group and Precipice Aquifer Group suggest negative change in storage volumes, while water balance estimates for the Hutton - Injune Creek Aquifer Group and the Rolling Downs Aquifer Group suggest an increasing change in storage volumes. While the whole-of-GAB, sub-basin and major aquifer water balances provide basin-wide perspectives of the groundwater resource components, they also highlight the uncertainties associated with estimating groundwater recharge at a regional scale. The large range in groundwater storage values calculated for the water balance presented here, are too great to confidently provide a whole-of-GAB scale assessment of groundwater resources. - Assessment of new techniques for whole-of-GAB groundwater evaluation Assessments of new techniques, including spatial and temporal satellite data, show promising results for remote monitoring of groundwater levels at a whole-of-GAB scale. The new monitoring techniques are not currently operationalised and require further work to allow them to be integrated into current monitoring programs. The new techniques rely on ongoing groundwater level and pressure data, making existing on-ground groundwater monitoring networks essential for managing groundwater resources in the GAB. Gravity Recovery and Climate Experiment (GRACE) Gravity Recovery and Climate Experiment (GRACE) satellite derived groundwater storage change estimates were found to be largely consistent with calculated water balance groundwater storage change estimates, for GAB aquifers at the whole-of-GAB and sub-basin scale. The accuracy of GAB GRACE groundwater storage estimates is largely dependent on the accuracy of supplementary datasets required to account for gravity signals not associated with the GAB groundwater (e.g. surface water, soil moisture and shallow groundwater). The assessments undertaken for the Project indicate GRACE satellite observations are a powerful tool to remotely monitor confined groundwater storage change trends, at the whole-of-GAB and sub-basin scale over monthly to decadal time-scales. Interferometric Synthetic Aperture Radar (InSAR) Based on Interferometric Synthetic Aperture Radar (InSAR) satellite data, downward ground surface motion (subsidence) was shown to be associated with decreases in groundwater levels (drawdown) in aquifers of the northern Surat Basin focus area. In the western Eromanga Basin focus area, InSAR derived ground surface measurements were stable, consistent with stable groundwater levels over time. The Project has delivered the largest consistent mosaic of InSAR derived ground surface movement in Australia, with InSAR data processed for the majority of the GAB (~90% coverage). This assessment indicates that, where appropriate datasets for local scale corrections and interpretation are available, InSAR is a useful tool to remotely sense groundwater level changes over time. Groundwater flow model An assessment of whole-of-GAB scale groundwater flow modelling was undertaken using newly developed open-source geodynamic modelling code ‘Underworld’. The ‘Underworld’ code utilises high-performance computing capabilities and has the potential to produce groundwater flow simulations at unprecedented scale and resolution. A Bayesian-approach was applied to model simulations to characterise uncertainties with model results. The model outputs fit the hydraulic head input data acceptably and the results were consistent with the current groundwater system conceptualisation of the basin. The model has been developed as a proof-of-concept steady state model that currently has limitations. However, with further development the technique has potential to reconstruct past GAB groundwater flow regimes, testing revisions to GAB-scale hydrogeological conceptualisations and could be a useful tool to simulate basin-scale groundwater movement to complement and provide a broader context for local-scale groundwater flow models within the basin. - Data and knowledge gaps and recommendations for future work Remaining data and knowledge gaps were identified through the Project. Recommendations for future work are listed by theme below and include data acquisition, data integration and data processing at local, regional and whole-of-GAB scales to better constrain key groundwater system processes in order to improve sustainable resource management. Hydrogeological framework • Further updates to the geological framework, in particular New South Wales and Northern Territory, may be necessary to reduce lithostratigraphic interpretation uncertainty in areas where scarce palynological data combined with the presence of sandy units makes it difficult to interpret and to maintain consistency across jurisdiction boundaries. • Expand mapping of aquifer sand/shale ratios to quantify variability and connectivity within and between aquifers in targeted areas, particularly across jurisdiction boundaries. • Refine three-dimensional hydrogeological model in areas identified as having high uncertainty, such as the Carpentaria Basin. Groundwater recharge evaluation • Quantify the effects that aquifer geometry, lithological heterogeneity and structural influences have on groundwater recharge rates and pathways within the main GAB aquifers through acquisition of targeted complimentary geophysical, geological and hydrogeological data. • Rainwater sample acquisition and chemical analysis to reduce uncertainty of calculated regional groundwater recharge rates. • Acquisition of groundwater hydrochemistry and environmental tracer data to quantify key groundwater processes, including groundwater recharge rates and connectivity within and between aquifers. Groundwater system conceptualisation • Improved conceptualisation of saprolite, including hydraulic properties, extent, thickness, erosional variation, and structural disruption, to quantify the effect of saprolite on groundwater recharge processes. • Measure vertical pressure gradients and groundwater pressure-elevation profiles between GAB aquifers to conceptualise groundwater leakage, and in which direction. Water balance estimates • Standardise the methods used to estimate water balance components across the GAB and report uncertainty to increase confidence in the water balance values. • Estimation of uncertainty for all of the inflow and outflow parameters. • More exploration of how to incorporate uncertainty in the water balance calculations. Assessment of new techniques for whole-of-GAB groundwater evaluation • Develop large scale whole-of-GAB scale datasets to effectively remove non-groundwater components of GRACE signal and independently assess the GRACE estimated groundwater storage change. • Integrate InSAR with complementary datasets to correct for non-groundwater effects and identify groundwater signals at local and regional scales. • Apply the large scale groundwater flow model ensemble to estimate groundwater residence times and fluxes between aquifers as well as assess the role of hydraulic conductivity variations on groundwater flow paths with GAB aquifers. Science knowledge sharing and communication activities • Dedicated workshops with each State and Territory to share findings and identify major changes related to the new work that may have implications for water bore aquifer attribution, water level and pressure monitoring and water management. Groundwater science data and knowledge supporting the Great Artesian Basin Strategic Management Plan Australian and GAB state/territory governments have developed the Great Artesian Basin Strategic Management Plan (GAB SMP) in 2020 (DAWE, 2020). This Strategic Management Plan takes a principles-based approach to guiding governments, industry and the community in managing this important resource together to achieve economic, environmental, cultural and social outcomes for the GAB and its users. The outputs of the current project will contribute to the Great Artesian Basin Strategic Management Plan Principle 6 - Information and knowledge generation ensures that accurate, timely and readily accessible information supports good management of the Great Artesian Basin. This summary report is one of a number of products released as part of the GAB groundwater project. In addition to the key findings and outcomes presented here, companion technical reports, datasets and associated value-added products for the project are available for public use.

This data package, completed as part of Geoscience Australia’s National Groundwater Systems (NGS) Project, presents results of the second iteration of the 3D Great Artesian Basin (GAB) and Lake Eyre Basin (LEB) (Figure 1) geological and hydrogeological models (Vizy & Rollet, 2023) populated with volume of shale (Vshale) values calculated on 2,310 wells in the Surat, Eromanga, Carpentaria and Lake Eyre basins (Norton & Rollet, 2023). This provides a refined architecture of aquifer and aquitard geometry that can be used as a proxy for internal, lateral, and vertical, variability of rock properties within each of the 18 GAB-LEB hydrogeological units (Figure 2). These data compilations and information are brought to a common national standard to help improve hydrogeological conceptualisation of groundwater systems across multiple jurisdictions. This information will assist water managers to support responsible groundwater management and secure groundwater into the future. This 3D Vshale model of the GAB provides a common framework for further data integration with other disciplines, industry, academics and the public and helps assess the impact of water use and climate change. It aids in mapping current groundwater knowledge at a GAB-wide scale and identifying critical groundwater areas for long-term monitoring. The NGS project is part of the Exploring for the Future (EFTF) program—an eight-year, $225 million Australian Government funded geoscience data and precompetitive information acquisition program. The program seeks to inform decision-making by government, community, and industry on the sustainable development of Australia's mineral, energy, and groundwater resources, including those to support the effective long-term management of GAB water resources. This work builds on the first iteration completed as part of the Great Artesian Basin Groundwater project (Vizy & Rollet, 2022; Rollet et al., 2022), and infills previous data and knowledge gaps in the GAB and LEB with additional borehole, airborne electromagnetic and seismic interpretation. The Vshale values calculated on additional wells in the southern Surat and southern Eromanga basins and in the whole of Carpentaria and Lake Eyre basins provide higher resolution facies variability estimates from the distribution of generalised sand-shale ratio across the 18 GAB-LEB hydrogeological units. The data reveals a complex mixture of sedimentary environments in the GAB, and highlights sand body development and hydraulic characteristics within aquifers and aquitards. Understanding the regional extents of these sand-rich areas provides insights into potential preferential flow paths, within and between the GAB and LEB, and aquifer compartmentalisation. However, there are limitations that require further study, including data gaps and the need to integrate petrophysics and hydrogeological data. Incorporating major faults and other structures would also enhance our understanding of fluid flow pathways. The revised Vshale model, incorporating additional boreholes to a total of 2,310 boreholes, contributes to our understanding of groundwater flow and connectivity in the region, from the recharge beds to discharge at springs, and Groundwater Dependant Ecosystems (GDEs). It also facilitates interbasinal connectivity analysis. This 3D Vshale model offers a consistent framework for integrating data from various sources, allowing for the assessment of water use impacts and climate change at different scales. It can be used to map groundwater knowledge across the GAB and identify areas that require long-term monitoring. Additionally, the distribution of boreholes with gamma ray logs used for the Vshale work in each GAB and LEB units (Norton & Rollet, 2022; 2023) is used to highlight areas where additional data acquisition or interpretation is needed in data-poor areas within the GAB and LEB units. The second iteration of surfaces with additional Vshale calculation data points provides more confidence in the distribution of sand bodies at the whole GAB scale. The current model highlights that the main Precipice, Hutton, Adori-Springbok and Cadna-owie‒Hooray aquifers are relatively well connected within their respective extents, particularly the Precipice and Hutton Sandstone aquifers and equivalents. The Bungil Formation, the Mooga Sandstone and the Gubberamunda Sandstone are partial and regional aquifers, which are restricted to the Surat Basin. These are time equivalents to the Cadna-owie–Hooray major aquifer system that extends across the Eromanga Basin, as well as the Gilbert River Formation and Eulo Queen Group which are important aquifers onshore in the Carpentaria Basin. The current iteration of the Vshale model confirms that the Cadna-owie–Hooray and time equivalent units form a major aquifer system that spreads across the whole GAB. It consists of sand bodies within multiple channel belts that have varying degrees of connectivity' i.e. being a channelised system some of the sands will be encased within overbank deposits and isolated, while others will be stacked, cross-cutting systems that provide vertical connectivity. The channelised systemtransitions vertically and laterally into a shallow marine environment (Rollet et al., 2022). Sand-rich areas are also mapped within the main Poolowanna, Brikhead-Walloon and Westbourne interbasinal aquitards, as well as the regional Rolling Downs aquitard that may provide some potential pathways for upward leakage of groundwater to the shallow Winton-Mackunda aquifer and overlying Lake Eyre Basin. Further integration with hydrochemical data may help groundtruth some of these observations. This metadata document is associated with a data package including: • Seventeen surfaces with Vshale property (Table 1), • Seventeen surfaces with less than 40% Vshale property (Table 2), • Twenty isochore with average Vshale property (Table 3), • Twenty isochore with less than 40% Vshale property (Table 4), • Sixteen Average Vshale intersections of less than 40% Vshale property delineating potential connectivity between isochore (Table 5), • Sixteen Average Vshale intersections of less than 40% Vshale property delineating potential connectivity with isochore above and below (Table 6), • Seventeen upscaled Vshale log intersection locations (Table 7), • Six regional sections showing geology and Vshale property (Table 8), • Three datasets with location of boreholes, sections, and area of interest (Table 9).

<div>This report summarises information regarding groundwater processes considered to have direct influence on the water balance for the Great Artesian Basin (GAB). These processes are recharge, discharge, and connectivity within the GAB sequence, as well as connectivity with underlying basins and overlying cover. </div><div>The substantial body of literature available on the GAB gives the impression that there is a considerable degree of understanding of the GAB groundwater system. This is, however, misleading. The reality is that many reports and reviews have been cited or reworked from pre-existing studies without carrying over the original uncertainties. Over time, the scale of knowledge gaps has been reduced only incrementally, while there has been a growing appreciation of the complexities in the system. With so much conceptual and quantitative uncertainty, much additional investigation is still required.</div><div><br></div>

The Great Artesian Basin Research Priorities Workshop, organised by Geoscience Australia (GA), was held in Canberra on 27 and 28 April 2016. Workshop attendees represented a spectrum of stakeholders including government, policy, management, scientific and technical representatives interested in GAB-related water management. This workshop was aimed at identifying and documenting key science issues and strategies to fill hydrogeological knowledge gaps that will assist federal and state/territory governments in addressing groundwater management issues within the GAB, such as influencing the development of the next Strategic Management Plan for the GAB. This report summarises the findings out of the workshop.

Geoscience Australia’s regional assessments and basin inventories are investigating Australia’s groundwater systems to improve knowledge of the nation’s groundwater potential under the Exploring for the Future (EFTF) Program and Geoscience Australia’s Strategy 2028. Where applicable, integrated basin analysis workflows are being used to build geological architecture advancing our understanding of hydrostratigraphic units and tie them to a nationally consistent chronostratigraphic framework. Here we focus on the Great Artesian Basin (GAB) and overlying Lake Eyre Basin (LEB), where groundwater is vital for pastoral, agricultural and extractive industries, community water supplies, as well as supporting indigenous cultural values and sustaining a range of groundwater dependent ecosystems such as springs and vegetation communities. Geoscience Australia continued to revise the chronostratigraphic framework and hydrostratigraphy for the GAB infilling key data and knowledge gaps from previous compilations. In collaboration with Commonwealth and State government agencies, we compiled and standardised thousands of boreholes, stratigraphic picks, 2D seismic and airborne electromagnetic data across the GAB. We undertook a detailed stratigraphic review on hundreds of key boreholes with geophysical logs to construct consistent regional transects across the GAB and LEB, using geological time constraints from hundreds of boreholes with existing and newly interpreted biostratigraphic data. We infilled the stratigraphic correlations along key transects across Queensland, New South Wales, South Australia and Northern Territory borders to refine nomenclature and stratigraphic relationships between the Surat, Eromanga and Carpentaria basins, improving chronostratigraphic understanding within the Jurassic to Cretaceous units. We extended the GAB geological framework to the overlying LEB to better resolve the Cenozoic stratigraphy and potential hydrogeological connectivity. New data and information fill gaps and refine the previous 3D hydrogeological model of the entire GAB and LEB. The new 3D geological and hydrostratigraphic model provides a framework to integrate additional hydrogeological and rock property data. It assists in refining hydraulic relationships between aquifers within the GAB and provides a basis for developing more detailed hydrogeological system conceptualisations. This is a step towards the future goal of quantifying hydraulic linkages with underlying basins, and overlying Cenozoic aquifers to underpin more robust understanding of the hydrogeological systems within the GAB. This approach can be extended to other regional hydrogeological systems. This Abstract was submitted/presented at the 2023 Australasian Exploration Geoscience Conference (AEGC) 13-18 March (https://2023.aegc.com.au/)

This web service provides access to geological, hydrogeological and hydrochemical digital datasets that have been published by Geoscience Australia for the Great Artesian Basin (GAB).

The document summarises new seismic interpretation metadata for two key horizons from Base Jurassic to mid-Cretaceous strata across the western and central Eromanga Basin, and the underlying Top pre-Permian unconformity. New seismic interpretations were completed during a collaborative study between the National Groundwater Systems (NGS) and Australian Future Energy Resources (AFER) projects. The NGS and AFER projects are part of Exploring for the Future (EFTF)—an eight year, $225 million Australian Government funded geoscience data and precompetitive information acquisition program to inform decision-making by government, community and industry on the sustainable development of Australia's mineral, energy and groundwater resources. By gathering, analysing and interpreting new and existing precompetitive geoscience data and knowledge, we are building a national picture of Australia’s geology and resource potential. This will help support a strong economy, resilient society and sustainable environment for the benefit of all Australians. The EFTF program is supporting Australia’s transition to a low emissions economy, industry and agriculture sectors, as well as economic opportunities and social benefits for Australia’s regional and remote communities. Further details are available at http://www.ga.gov.au/eftf. The seismic interpretations build on previous work undertaken as part of the ‘Assessing the Status of Groundwater in the Great Artesian Basin’ (GAB) Project, commissioned by the Australian Government through the National Water Infrastructure Fund – Expansion (Norton & Rollet, 2022; Vizy & Rollet, 2022; Rollet et al., 2022; Rollet et al., in press.), the NGS Project (Norton & Rollet, 2023; Rollet et al., 2023; Vizy & Rollet, 2023) and the AFER Project (Bradshaw et al., 2022 and in press, Bernecker et al., 2022, Iwanec et al., 2023; Iwanec et al., in press). The recent iteration of revisions to the GAB geological and hydrogeological surfaces (Vizy & Rollet, 2022) provides a framework to interpret various data sets consistently (e.g., boreholes, airborne electromagnetic, seismic data) and in a 3D domain, to improve our understanding of the aquifer geometry, and the lateral variation and connectivity in hydrostratigraphic units across the GAB (Rollet et al., 2022). Vizy and Rollet (2022) highlighted some areas with low confidence in the interpretation of the GAB where further data acquisition or interpretation may reduce uncertainty in the mapping. One of these areas was in the western and central Eromanga Basin. New seismic interpretations are being used in the western Eromanga, Pedirka and Simpson basins to produce time structure and isochore maps in support of play-based energy resource assessment under the AFER Project, as well as to update the geometry of key aquifers and aquitards and the GAB 3D model for future groundwater management under the NGS Project. These new seismic interpretations fill in some data and knowledge gaps necessary to update the geometry and depth of key geological and hydrogeological surfaces defined in a chronostratigraphic framework (Hannaford et al., 2022; Bradshaw et al., 2022 and in press; Hannaford & Rollet, 2023). The seismic interpretations are based on a compilation of newly reprocessed seismic data (Geoscience Australia, 2022), as part of the EFTF program, and legacy seismic surveys from various vintages brought together in a common project with matching parameters (tying, balancing, datum correcting, etc.). This dataset has contributed to a consolidated national data coverage to further delineate groundwater and energy systems, in common data standards and to be used further in integrated workflows of mineral, energy and groundwater assessment. The datasets associated with the product provides value added seismic interpretation in the form of seismic horizon point data for two horizons that will be used to improve correlation to existing studies in the region. The product also provides users with an efficient means to rapidly access a list of core data used from numerous sources in a consistent and cleaned format, all in a single package. The following datasets are provided with this product: 1) Seismic interpretation in a digital format (Appendix A), in two-way-time, on key horizons with publically accessible information, including seismic interpretation on newly reprocessed data: Top Cadna-owie; Base Jurassic; Top pre-Permian; 2) List of surveys compiled and standardised for a consistent interpretation across the study area (Appendix B). 3) Isochore points between Top Cadna-owie and Base Jurassic (CC10-LU00) surfaces (Appendix C). 4) Geographical layer for the seismic lines compiled across Queensland, South Australia and the Northern Territory (Appendix D). These new interpretations will be used to refine the GAB geological and hydrogeological surfaces in this region and to support play-based energy resource assessments in the western Eromanga, Pedirka and Simpson basins.