AndreaBozzo/ceres-open-data-index huggingface dataset:
Long-term landscape evolution on Groote Eylandt, Northern Territory

Like other areas throughout the north of the Northern Territory, Groote Eylandt is dominated by a landscape of great age.  Previous interpretations have argued that this landscape experienced repeated cycles of uplift and erosion during the Tertiary.  This view is challenged by the evidence of two palaeovalleys which traverse the island ; both are filled with Cretaceous sedimentary rocks and are incised into a plateau surface of supposedly Miocene age.  The Cretaceous marine transgression was the most important event in the long-term landscape history of Groote Eylandt.  The resulting raised base-level, and the associated sedimentary infilling of valleys, lifted streams from their existing valleys, and promoted the development of a new stream network, which has persisted till the present.  Apart from the obvious drainage alterations, no other significant modifications to the Groote Eylandt landscape have occurred since at least the late Mesozoic: an escarpment traversing the island has retreated less than 500 m since this time, and the upland plateau and surrounding lowland plains of pre-Cretaceous age have maintained their general form.

Tags: Earth Sciences, GA Publication, Journal, NT, Published_External
Organization: Geoscience Australia Data
Australian Fisheries Enforcement Zones - Front (Indonesian)

This map is produced for the Australian Fisheries Management Authority to assist their enforcement of Australia's Maritime Boundaries. It has lots of icons to explain to Indonesian fishermen where they can and cannot fish in the Timor and Arafura Seas.

This version is an Indonesian translation.

It is not for sale or public release by Geoscience Australia. Public release is thru DEH and AFMA.

Updated in 2019 to reflect the 2018 Australia/Timor-Leste Maritime Boundaries Treaty.

Tags: Administrative Boundary, Earth Sciences, Published_External, Thematic Map, administrative boundaries, marine
Organization: Geoscience Australia Data
Australia's Maritime Jurisdiction around Macquarie Island - Mercator projection

Map showing Australia's Maritime Jurisdiction around Macquarie Island.
Based on Mercator Projection.
One of the 27 constituent maps of the "Australia's Maritime Jurisdiction Map Series" (GeoCat 71789).
Depicting Australia's extended continental shelf, approved by the Commission on the Limits of the Continental Shelf in April 2008, treaties and various maritime zones.  Background bathymetric image is derived from a combination of the 2009 9 arc second bathymetric and topographic grid by GA and a grid by Smith and Sandwell, 1997.
A0 sized portrait format .pdf downloadable from the web.

Tags: AU-TAS, Administrative Boundary, Earth Sciences, Published_External, Thematic Map, administrative boundaries, bathymetry, continental shelf, marine, marine jurisdiction
Organization: Geoscience Australia Data
The geology of the Betoota 4-mile sheet area, western Queensland

Cretaceous and Tertiary rocks are exposed over the total area of nearly 7,000 square miles. Surface and subsurface information reveals 6,000 feet of Mesozoic sediments and 30 feet of Tertiary rocks. The topmost beds are much weathered and silicified. In the south-east near Betoota there is a broad, elongate dome, and some minor structural trends to the west. A deep bore (9,824 feet) was drilled in the Betoota Dome in 1960 by Delhi-Frome-Santos, but failed to find economic quantities of oil or gas. The bore bottomed in steeply dipping red and green conglomerates of pre-Jurassic age. There is one artesian bore in the area, and several attempts to find supplies of sub-artesian water have been unsuccessful

Tags: AU-QLD, Earth Sciences, GA Publication, Published_External, Record, geology
Organization: Geoscience Australia Data
Vegetation and climate of the late Cainozoic in the Murray Basin and their bearing on the salinity problem

The Murray Basin was forested throughout the Tertiary, becoming open woodlands and grasslands in Plio-Pleistocene time. Precipitation was very high through the early Tertiary, with step-like decreases beginning in the late Oligocene- early Miocene. In the mid-late Miocene. widespread rainforest disappeared and was replaced with eucalypt wet sclerophyll forest which was burnt on a regular basis. For a brief interval in the late Miocene- early Pliocene, there is a resurgence of Nothofagus (the Nothofagus phase) which forms a well defined stratigraphic horizon. The Nothofagus phase is well marked in the major river systems of the western slopes of the Eastern Highlands, but it has also been found in the western Murray Basin. The climate was wetter at this time, which is thought to correlate with the late Miocene- early Pliocene maximum marine transgression. An assemblage with a high chenopod type and Asteraceae pollen content is deceptively like modern assemblages of arid regions, but close examination reveals a salt-marsh environment associated with the early mid Miocene marine transgression. Throughout the Tertiary and into the early Pleistocene, the only indications of salinity are associated with marine / marginal marine environments. There is no evidence of dryland salinity, as seen today.

Tags: Earth Sciences, GA Publication, Journal, NSW, Published_External, SA, VIC
Organization: Geoscience Australia Data
2019 B-Series De-trended Global Isostatic Residual Gravity Map of Australia

The main part of this map is a Hue-Saturation-Intensity (HSI) image of De-trended Global Isostatic Residual Gravity data (DGIR) based on the B Series of the 2019 Australian National Gravity Grids. This series of grids represent the combination of 1.4 million ground gravity observations stored in the Australian National Gravity Database (ANGD) as of September 2019; 345,000 line km of Airborne Gravity and 106,000 line km of gravity gradiometry data in the National Australian Geophysical Database (NAGD), and the Global Gravity Grid developed at Scripps Institution of Oceanography, University of California at San Diego using data from the United States SIO, NOAA and NGA. The ground and airborne gravity data have been acquired by the Commonwealth, State and Territory Governments, the mining and exploration industry, universities and research organisations from the 1940’s to the present day. 

The shading of the image is from the northwest and the colour scale is linear from -500 µm.s-2 (blue) to +500 µm.s-2 (red).

Tags: Australia, EARTH SCIENCES, GEOPHYSICS, Isostatic Correction, NCI, Published_External, airborne, de-trended, de-trended isostatic, gravity, ground gravity, isostatic residual, marine gravity
Organization: Geoscience Australia Data
Geomorphology and Stratigraphy of Keppel Bay, South-east Queensland, Australia

Keppel Bay is a large shallow coastal embayment adjacent to the mouth of the Fitzroy River, located on the central coast of Queensland. The geomorphology and distribution of sediment in Keppel Bay is complex due to the influence of Late Quaternary sea-level change, relict topography, a geologically diverse catchment, macrotidal hydrodynamic processes and flood events. 

Seabed morphology, sub-bottom profiles and sediment cores reveal the former path of the Fitzroy River across Keppel Bay and the continental shelf. The palaeo-Fitzroy River flowed west across the shelf to the north of Northwest Reef, a position on the shelf that is now under approximately 60 m of water. With the rise in sea level during the early Holocene, the mouth of the Fitzroy River retreated across the continental shelf and by the middle Holocene it was landwards of its present location, near Rockhampton. During the last few thousand years under a relatively stable sea level, much of the shallow inner region of Keppel Bay has been infilled and the coast has prograded several kilometres. Palaeochannels in the inner section of Keppel Bay have mostly been infilled with sediment, which mainly comprises muddy sand from the Fitzroy River. In the outer bay and on the shelf further west many relict channels have not been infilled with marine sediment indicating that the area is relatively starved of sediment. Sediments in outer Keppel Bay are dominantly relict fluvial deposits that are well sorted with only a minor mud component. Subaqueous dunes in the outer southeastern section of Keppel Bay and Centre Bank indicate that tidal currents and currents associated with the predominant southeasterly winds, appear to be transporting marine biogenic sediments and relict coarse terrigenous sediments into Keppel Bay.

Tags: AU-QLD, Earth Sciences, GA Publication, Published_External, Record, climate, coasts, continental shelf, depositional mechanisms, marine, seabed
Organization: Geoscience Australia Data
Marine geology of the Capricorn Channel area

The area discussed in this Bulletin covers the Capricorn and Curtis Channels, Hervey Bay, and the continental shelf and slope off the northern part of Fraser Island; it also includes the reefs of the Capricorn and Bunker Groups, and the southern edge of the Swain Reefs. This study has concentrated on the morphology, sediments, and shallow stratigraphy and structure of the region. The area is bounded by the Queensland mainland to the west and the Tasman Basin to the east. The floor of the Capricorn Channel slopes down to the southeast and eventually merges with the Tasman abyssal plain. There is no well defined shelf break in this area, and although there is an increase in gradient between the 600 and 1000-m isobaths, no true continental slope exists. East of the Swain Reefs the sea floor slopes down to the Marion Plateau, a wide marginal plateau between depths of 200 and 600 m. This in turn slopes down into the Cato Trough. Fraser Island has been built out across the continental shelf and its northward extension, the Breaksea Spit, extends almost to the edge of the shelf. A submarine canyon system dissects the continental slope to the north and east of Breaksea Spit. The Capricorn Channel forms a large embayment between the Swain Reefs and the Capricorn and Bunker Groups. The floor of the channel shows very little topographic expression except for some reefal banks, a zone of high-amplitude sand waves, and a shallow trough near the 200-m isobath. All these features are considered to be relict, although the reefal banks immediately north of the Capricorn Group support an abundant living fauna. They also provide evidence of low sea levels during the time of their formation. Features on the shelf south of the Capricorn and Bunker Groups and in Hervey Bay include symmetric and asymmetric sand waves, and an ancient subaerial drainage system that extends across the shelf to the continental slope. The sediments have been divided into nine lithofacies primarily on the basis of texture and carbonate content. Most of the shelf is covered by sands while the Capricorn Channel is floored by predominantly fine-grained sediments. The main structural elements of the area are the Bunker High, Swains High, and the intervening Capricorn Basin. Seismic results show a draping of sediments over the Bunker High and the presence of shallow basement in the area. The Capricorn Basin is considered to have begun subsiding towards the end of the Cretaceous, possibly as a result of the opening of the northern Tasman Basin. The thick sequence of sediments in the basin consists of a predominantly non-marine Palaeogene succession and a marine Neogene succession.

Tags: AU-QLD, Bulletin, Earth Sciences, GA Publication, Published_External, geology, marine, marine survey
Organization: Geoscience Australia Data
Formation of the Lord Howe Rise continental ribbon during eastern Gondwana breakup from multi-channel seismic reflection data

The Lord Howe Rise continental ribbon, offshore eastern Australia, formed during the Late Cretaceous rifting of eastern Gondwana. This project focuses on multi-channel seismic reflection and bathymetry data collected on a multi-leg marine geophysical survey in 2016 to constrain the nature of rifting and the formation of the Lord Howe Rise. We present processed pre-stack depth-migrated seismic reflection images and interpretations of a regional, ~900 km long east¿west-oriented profile at 27.2°S, from the oceanic Tasman Basin to the extended continental crust of the Lord Howe Rise. We find that the Tasman Basin contains buried basins that may be related to early transform faulting. The Tasman Basin has a sharp eastern boundary against the Dampier Ridge, within which are multiple rift basins up to 3 km deep. These basins are similar to those found on the Lord Howe Rise. The Middleton Basin separates the Dampier Ridge and the Lord Howe Rise and is a broad, well-stratified sedimentary basin of up to ~3.5 km thickness. This basin contains an unconformity that separates strata conformable with the basement and post-rifting strata. Both syn-rift and post-rift sedimentary sequences are found on the Lord Howe Rise. To better understand these rifting events, we present grids of pre-stack time-migrated seismic reflection lines covering two rift basins of the Lord Howe Rise. The two basins show contrasting evolution, including variations in normal faulting within the syn-rift sequences. These results help constrain the dynamic processes that caused the formation of the Lord Howe Rise continental ribbon.

Abstract submitted and presented at 2017 IAG-IASPEI conference (https://www.zisin.jp/event/iag-iaspei-2017/)

Tags: EARTH SCIENCES
Organization: Geoscience Australia Data
5028 Block 3 (Northwest) Grid of thorium ground concentration with NASVD and standard reductions applied

The radiometric, or gamma-ray spectrometric method, measures the natural variations in the gamma-rays detected near the Earth's surface as the result of the natural radioactive decay of potassium (K), uranium (U) and thorium (Th). The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.
This radiometric thorium grid has a cell size of  degrees (approximately 20m) and shows thorium element concentration of the Narryer in units of parts per million (or ppm). The data used to produce this grid was acquired in 2024 by the WA Government, and consisted of 415090 line-kilometres of data at 100m line spacing and 50m terrain clearance.

Tags: Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, NASVD, NCI, Published_External, Th, WA, airborne digital data, gamma-ray, geophysical survey, geophysics, grid, rad, radiometrics, raster, spectrometry, survey 5028, thorium
Organization: Geoscience Australia Data
Capricorn and northern Tasman Basins: Structure and Depositional Systems

The Bureau of Mineral Resources completed a major marine multi-channel seismic reflection survey (MCS) off southeast Queensland in December 1989. The research cruise, using RV 'Rig Seismic: was designed to investigate the structure, stratigraphy and petroleum resource potential of offshore basins along this sector of the Australian continental margin. About half of the 2900 km of seismic data acquired were recorded over the Capricorn Basin and margins of the northern Tasman Basin. The survey included seismic ties to the only deep offshore wells in the region, Aquarius-1 and Capricorn-lA, located in the northern Capricorn Basin. It was the first MCS survey shot in the region since 1974. Sonobuoy refraction, gravity, magnetic and bathymetric data were also collected. The Capricorn Basin evolved in the Late Cretaceous as a failed rift arm at the northern end of the Tasman rift system. From the seismic data, basin development in the Capricorn Basin is seen as typically comprising 0.5 ? 1.0 s twt of syn-rift continental/Irestricted marine deposits (Late Cretaceous-early Palaeogene) overlain by about 1.5 s twt of Eocene-Recent, mainly marine, post-rift sediments.

Tags: AU-QLD, AU-TAS, AU-VIC, Earth Sciences, External Publication, Published_External, Scientific Journal Paper, structural geology
Organization: Geoscience Australia Data
New SHRIMP U-Pb geochronology from the Khetri Copper Belt, Aravalli Craton and the Koppal syenite complex, Dharwar Craton, India

This Record presents new U-Pb geochronology results from nine geological samples from India. The work was conducted under the auspices of a Memorandum of Understanding (MOU) between Geoscience Australia (GA) and the Geological Survey of India (GSI), operative between September 2015 and August 2025. This MOU was established to pursue scientific and technical cooperation in the field of Earth Sciences to strengthen bilateral cooperation. One of the activities specified in this MOU was to acquire geochronological data via a Geochronology Secondment of GSI officials to GA.

Officials from the Geological Survey of India visited Geoscience Australia for a period of 5 weeks in April and May 2025, to conduct geochronological analyses and to exchange knowledge regarding the practical aspects of conducting systematic geochronological and isotopic studies as part of government geological survey programs.

This report is a summary of Sensitive High Resolution Ion Microprobe (SHRIMP) zircon U-Pb geochronological results for 9 samples collected from GSI’s Uncover project in the Northern and Southern transects of India Uncover projects in the Aravalli, Bundelkhand and Dharwar cratons of India (Figure i). These studies were undertaken by GSI to explore the possibility of targeting concealed and deep-seated mineral deposits through the integration of geological, geochemical, geochronological and geophysical datasets. SHRIMP trace element zircon analyses were also conducted on the four southern transect samples, the results of which are presented in Appendix A.

Tags: Geochronology, India, Memorandum of Understanding (MOU) between Geoscience Australia (GA) and the Geological Survey of Ind, Published_External, U-Pb SHRIMP geochronology, zircon, zircon trace elements
Organization: Geoscience Australia Data
Treaties - Australian Maritime Boundaries 2014a (AMB2014a) - Geodatabase

Geoscience Australia has the primary role in the delineation of Australia's domestic and international maritime limits and boundaries. An output of this activity is the development of the Australian Maritime Boundaries (AMB) data. AMB is a GIS data product, replacing AMBIS 2006, providing access to the data for Australia's maritime zones. Treaties - Australian Maritime Boundaries Dataset 2014 is a digital representation of Australia's international treaty boundaries. In the event of an inconsistency between AMB data and the limits under any treaty, the latter prevails. The data have been published by Geoscience Australia in consultation with other relevant Commonwealth Government agencies including the Attorney-General's Department, the Department of Foreign Affairs and Trade and the Australian Hydrographic Office. 
This version contains a number of technical amendments made on the basis of user feedback. These include:
- Harmonisation of maritime boundaries, scheduled area and graticular block datasets in block SC51
The Treaties - Australian Maritime Boundaries Dataset 2014a comprises the maritime boundaries determined by treaties between Australia and neighbouring countries. All data coordinates are supplied in the GDA94 datum. Treaties - Australian Maritime Boundaries Dataset 2014a can also be viewed on-line via AMSIS (http://www.ga.gov.au/marine/jurisdiction/amsis.html). 

Product Specifications Coverage: Australia including all external territories Currency: May 2014. Coordinates: Geographical Datum: GDA94 (functionally equivalent to WGS84). Format: ESRI Geodatabase and REST web service - free online.

The area of coverage of the Treaties - Australian Maritime Boundaries Dataset 2014 is for the whole of the Australian marine jurisdiction which includes waters adjacent to the mainland, offshore islands and External Territories.  The geographical extent is approximately between the latitude limits of 8 S to 70 S and the longitude limits 39 E to 174 E.

This dataset includes the following disclaimers:
AMB data is a digital representation of the international maritime boundary treaties of Australia.  In the event of an inconsistency between AMB data and the limits under the various treaties, the latter prevails.

Tags: AU, GIS Dataset Thematic, Geospatial Information Systems, HVC_144653, Published_External, marine
Organization: Geoscience Australia Data
Videos and images from SOL4934 (Joseph Bonaparte Gulf)

The Joseph Bonaparte Gulf survey (SOL4934, GA survey #0322) was conducted on the R.V. Solander between 27 August and 24 September 2009 in collaboration with staff from the Australian Institute of Marine Science (AIMS) and the Northern Territory Government. The survey was completed under a Memorandum of Understanding between GA and the AIMS and represents the second of three surveys planned under this agreement. The survey obtained detailed geological (sedimentological, geochemical, geophysical) and biological data for the banks, channels and plains to establish the late-Quaternary evolution of the region and investigate relationships between the physical environment and associated biota for biodiversity prediction. Underwater video footage and still images were collected from 46 stations, although quality varies among transects and some still images were not of suitable quality for analysis. In addition, shipboard photographs were taken of barcoded biological specimens. Video and image files or associated parent folders are named according to station number, followed by gear code (TV or CAM = same underwater camera system) and then the deployment number. For example 48CAM35 represents a video transect from Station 48 that was the 35th video transect on the survey.

Tags: Earth Sciences, HVC_144640, Multimedia, Published_External, geochemistry, geophysics, marine, sedimentology
Organization: Geoscience Australia Data