AndreaBozzo/ceres-open-data-index huggingface dataset:
Lithology and diagenesis of the carbonate foundations of modern reefs in the southern Great Barrier Reef

In the southern Great Barrier Reef a relativel y thin (&lt; 20 m) Holocene reef has developed on a foundation comprising a succession of older reefs. This reef foundation extends to a depth of up to 420 m in the subsurface and ranges from late Pleistocene to middle Miocene in age. The boundary between the Holocene and late Pleistocene reef is marked by a prominent solution unconformity that shows development of soils, calcrete, and extensive leaching in the underlying limestone. This has resulted from relative lowering of sea level during the period from the last interglacial to the post-glacial transgression. Late Pleistocene reef lithologies within individual drill holes are similar to their overlying Holocene counterparts, and there seems to have been a duplication of environments during both growth periods. However, Halimeda limestones, which are a prominent framework infill in the Pleistocene reef are not as abundant in the Holocene reef.  Petrographic analysis of the late Pleistocene reef limestones shows that they have been subjected to near-surface subaerial diagenesis in both the vadose and phreatic freshwater zones. The effects of subaerial diagenesis increase progressively with depth below the solution unconformity, initially within the vadose zone and, ultimately, into the underlying phreatic zone. In the vadose zone, aragonite skeletons (e.g. corals. Halimeda) show two distinct processes of transformation to calcite: (1) total leaching and subsequent infill by sparry calcite cement: and (2) neomorphic replacement of aragonite by calcite, by a process of thin-film transformation. Variations in vadose and phreatic environments suggest that a more permanent freshwater lens was established around reef perimeters than beneath lagoons during the period of subaerial exposure.

Tags: Earth Sciences, GA Publication, Journal, Published_External, QLD, marine
Organization: Australian Ocean Data Network
Seafloor bathymetry of the Gascoyne Marine Park

This flythrough highlights canyon environments within the Gascoyne Marine Park offshore northwestern Australia. The Cape Range Canyon is a relatively narrow, linear canyon that initiates on the continental slope, but is connected to the shelf via a narrow channel. The walls of the canyon are steep and reveal a history of slumping and retrogressive failure, that have broadened the canyon over time. The floor contains a series of deep plunge pools, indicative of the action of sediment-laden turbidity currents in further eroding this canyon. 
Epibenthos within the canyons was relatively sparse and likely regulated by disturbance associated with sedimentation in the canyons. Rock overhangs often supported the highest densities of benthic suspension feeders, including glass sponges, octocorals, and ascidians. 
Bathymetry data and seafloor imagery for this flythrough was collected by the Schmidt Ocean Institute during survey FK200308. Funding was provided by Schmidt Ocean Institute, Geoscience Australia, the Australian Government’s National Environmental Science Program (NESP) Marine Biodiversity Hub, the Director of National Parks, and the Foundation for the WA Museum through a Woodside Marine Biodiversity Grant.

Tags: Bathymetric grids, Bathymetry, EARTH SCIENCES, Geomorphology and Regolith and Landscape Evolution, Marine, Multibeam, Published_External, fly through, video
Organization: Australian Ocean Data Network
Australian Onshore and Offshore Boreholes WMTS

This OGC conformant web service delivers data from Geoscience Australia's Boreholes database (borehole header and directional survey data) and associated geological observations (lithostratigraphic data). The data includes records of boreholes drilled by Geoscience Australia and its predecessor organisations (BMR, AGSO), all boreholes drilled in Australian Commonwealth offshore marine jurisdictions, and a selection of onshore boreholes drilled by government and private entities. Where possible this service conforms to the GeoSciML v4.1 data transfer standard.

Geoscience Australia is not a reporting or regulatory authority for borehole drilling.  Borehole information in Geoscience Australia's Boreholes database is sourced from various regulatory authorities in the States, Northern Territory and Commonwealth governments for Geoscience Australia research purposes.  Where Geoscience Australia is not the custodian of borehole data provided in this web service, the custodian agency provided with the data should be consulted as the authoritative source.

The data dictionary for this web service is at https://d28rz98at9flks.cloudfront.net/144578/144578_00_3.pdf. For information on borehole status definitions, refer to https://db-content.ga.gov.au/data_dictionary/Borehole_Status_vocabulary_2021.pdf

Tags: Published_External, WMTS, borehole, borehole logs, borehole samples, geology, lithology, lithostratigraphy, stratigraphy, web service
Organization: Australian Ocean Data Network
National Gravity Compilation 2019 - CSCBA 0.5VD grid

Gravity data measure small changes in gravity due to changes in the density of rocks beneath the Earth's surface. 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 National Gravity Compilation 2019 - CSCBA 0.5VD grid is derived from the 2019 Australian National Gravity Grids A series. These gravity data were acquired under the project No. 202008. The grid has a cell size of 0.00417 degrees (approximately 435m). This gravity anomaly grid is derived from ground observations stored in the Australian National Gravity Database (ANGD) as at September 2019, supplemented by offshore data sourced from v28.1 of the Global Gravity grid developed using data from the Scripps Institution of Oceanography, the National Oceanic and Atmospheric Administration (NOAA), and National Geospatial-Intelligence Agency (NGA) at Scripps Institution of Oceanography, University of California San Diego. Out of the approximately 1.8 million gravity observations, nearly 1.4 million gravity stations in the ANGD together with Airborne Gravity surveys totaling 345,000 line km and 106,000 line km of Airborne Gravity Gradiometry were used to generate this grid. The ground gravity data used in the national grid has 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. Station spacing varies from approximately 11 km down to less than 1 km, with major parts of the continent having station spacing between 2.5 and 7 km. Terrain corrections to gravity were calculated using both offshore bathymetry and onshore topography data. The grid shows half derivative of the complete Bouguer anomalies over Australia and its continental margins. A half vertical derivative was calculated by applying a fast Fourier transform (FFT) process to the complete spherical cap Bouguer anomaly grid of the 2019 Australian National Gravity Grids A series to produce this grid.

Tags: 05vd, A series, Australia, Bouguer, EARTH SCIENCES, Earth sciences, GADDS2.0, NCI, None, Published_External, complete, geophysical survey, geophysics, grav, gravity, grid, ground digital data, half vertical derivative, marine, national, raster, satellite, spherical cap, survey 202008
Organization: Australian Ocean Data Network
2008 National Data Elevation Audit, The Shared Digital Representation of Australia's Landform and Seabed

National Elevation Data Audit is a report outlining all elevation data available across all Australian jurisdictions which was identified by the Intergovernment Committee on Surveying and Mapping's (ICSM) Permanent Committee on Topographic Information (PCTI).

Tags: DEM, Earth Sciences, GA Publication, Published_External, Report, data, digital elevation data, information management, marine, topography
Organization: Australian Ocean Data Network
Seafloor Mapping of the South-east Region and Adjacent Waters : AUSTREA-2 Cruise Report: South-east of Tasmania and Southern Macquarie Ridge

In January/February 2000, the Australian Geological Survey Organisation (AGSO)
completed a 2S-day seabed swath-mapping and geophysical survey off south and
south-east Tasmania and south of Macquarie Island for the National Oceans Office
and Environment Australia. The survey, which is named AUSTREA-2 and designated
as AGSO Cruise 223, used the 8S-m French oceanographic and geoscience research
vessel N/O L 'Atalante, which departed Hobart on January IS and arrived in Bluff,
New Zealand, on February 9. The survey covered about 10,200 km and mapped about
140,000 km2 of seabed. The initial impetus for the work was to map the foot-of-slope
position in several areas to support definition of Australia's legal Continental Shelf
under the United Nations Convention on the Law of the Sea. A significant additional
but complementary aspect was to support marine zone planning and management, and
assessment of seabed living and non-living (petroleum and mineral) resources, as an
important step towards implementation of Australia's Oceans Policy and Australia's
Marine Science and Technology Plan, and, in particular, the development of the
South-east Regional Marine Plan by the National Oceans Office.
Geophysical data collected included Simrad EM12D swath bathymetry and
backscatter, 6-channel GI-gun seismic, 3.S kHz sub-bottom profiling, and gravity and
magnetic profiles. This was augmented by a suite of oceanographic data, such as
seawater temperature, and both current and salinity depth profiles. Weather and sea
conditions were highly favourable, particularly in the more southern latitudes.
Occasional periods of rough weather resulted in higher noise levels, but did not
seriously affect acquisition, and data quality was generally excellent.
The work conducted off Tasmania was mostly to fill in and extend previous swath
coverage, and map the foot-of-slope along the eastern margin of the South Tasman
Rise. It highlighted features such as the major development of slope canyons down
the eastern Tasmanian margin, and the complex character of the Cascade Seamount
and other seamounts adjacent to the South Tasman Rise.
The work conducted over the southern Macquarie Ridge Complex highlighted
features such as: a high-relief axial valley adjoining the deep Hjort Trench; the
broadening to the south of the submerged Hjort Ridge, east of the Hjort Trench; the
development of seafloor spreading tectonic fabric across the Hjort Ridge summit; and
the presence of a linear trough/ridge feature that obliquely truncates the southern end
of the Hjort Trench and adjoining axial valley.
A full set of shipboard maps are held by the National Oceans Office and AGSO, and
copies of the digital data are stored at AGSO. All data from the survey will be
managed jointly by AGSO and the National Oceans Office.

Tags: AU-TAS, Earth Sciences, GA Publication, Published_External, Record, continental margins, geophysics, marine, marine survey
Organization: Australian Ocean Data Network
Videos and images from GA2476 (Western Australian Margin)

The Western Margin survey (GA survey #2476) was conducted on the R.V. Sonne between 25 October 2008 and 19 January 2009 in collaboration with staff from the Western Australia Geological Survey and the University of the Sea. The voyage was operated through the Offshore Energy Security Program, with the principal aims of acquiring geological, geophysical, oceanographic, and biological data over poorly known areas of Australia's western continental margin. A total of 44 video transects were surveyed, with an associated 6,229 still photographs acquired from water depth of 831-4,827 m. Video was recorded to mini DV tapes, and copied to digital format. Video snippets were also created of representative habitats for some stations. Video and image files or associated parent folders are named according to station number, followed by gear code (CAM  = OFOS camera which collected still images and video, GR = BODO grab which collected black and white video) and then the deployment number. For example 36GR19 represents a video transect from Station 36 that was the 19th video transect from the BODO grab on the survey. For further information on this survey please refer to the post-survey report (GA Record 2009/38 - Geocat #69606) and GA Record 2009/26 (Geocat #69358).

Tags: AU-WA, Earth Sciences, HVC_144640, Multimedia, Published_External, marine
Organization: Australian Ocean Data Network
Petroleum Source Rock and Fluids Atlas Database - Onshore and Offshore

The Source Rock and Fluids Atlas delivery and publication services provide up-to-date information on petroleum (organic) geochemical and geological data from Geoscience Australia's Organic Geochemistry Database (ORGCHEM). The sample data provides the spatial distribution of petroleum source rocks and their derived fluids (natural gas and crude oil) from boreholes and field sites in onshore and offshore Australian basins. The services provide characterisation of source rocks through the visualisation of Pyrolysis, Organic Petrology (Maceral Groups, Maceral Reflectance) and Organoclast Maturity data.  The services also provide molecular and isotopic characterisation of source rocks and petroleum through the visualisation of Bulk, Whole Oil GC, Gas, Compound-Specific Isotopic Analyses (CSIA) and Gas Chromatography-Mass Spectrometry (GCMS) data tables. Interpretation of these data enables the characterisation of petroleum source rocks and identification of their derived petroleum fluids that comprise two key elements of petroleum systems analysis. The composition of petroleum determines whether or not it can be an economic commodity and if other processes (e.g. CO2 removal and sequestration; cryogenic liquefaction of LNG) are required for development.

Tags: Analyses, Australia’s Future Energy Resources, Basins, Enhanced Data Delivery, Exploring For The Future - EFTF, Gas, Gas Chromatograph (GC), Gochemical, Oil, Organic, Petroleum, Petrology, Published_External, Pyrolysis, Reflectance, Sampling, Stratigraphy, macerals
Organization: Australian Ocean Data Network
SUPERSEDED: eReefs GBR4 Biogeochemical and sediments model data - Version 926

SUPERSEDED: This dataset has been superseeded by GBR4_H2p0_B2p0_Chyd_Dcrt(2010-12 to 2016-10) and then by GBR4_H2p0_B3p1_Cq3b_Dhnd (2010-04 to 2019-04) and it was removed from the NCI fx3 project and THREDDS server in April 2024.  An archive copy has been retained by the custodians, and access can be arranged on request.

This is the eReefs GBR 4 km resolution Biogeochemistry (BGC) and Sediments model data version 926. It is based on the eReefs GBR 4 km Hydrodynamic SHOC model data for physical properties plus a sediment transport model for predicting the fate of suspended fine sediments and a biogeochemical model for water column and benthic production, water quality and nutrient cycling. It includes a spectrally resolved light model and is forced by a wave model to calculate resuspension rates of particulate matter

Organization: Australian Ocean Data Network
Offshore Petroleum and Greenhouse Gas Storage Act 2006 - Australian Maritime Boundaries 2020 (AMB2020) - 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. AMB2020 is a GIS data product, replacing AMB2014a, providing access to the data for Australia's maritime zones. Offshore Petroleum and Greenhouse Storage Act 2006 - Australian Maritime Boundaries Dataset 2020 is a digital representation of the scheduled and offshore areas defined under this Act. In the event of an inconsistency between AMB data and the limits under any legislation, 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. 

The AMB2020 version has been updated to reflect the 2018 Timor Sea Treaty, including the Bayu-Undan Offshore Area.

Offshore Petroleum and Greenhouse Storage Act 2006 - Australian Maritime Boundaries Dataset 2014 comprise the scheduled and offshore areas defined under the Act. AMB Data 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: August 2019. Coordinates: Geographical Datum: GDA94 (functionally equivalent to WGS84). Format: ESRI Geodatabase and REST web service - free online.

The area of coverage of the AMB data 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 territorial sea baseline and of the outer limits of Australia's maritime zones.  The baseline and zones are established under the Offshore Petroleum and Greenhouse Storage Act 2006.  In the event of an inconsistency between AMB data and the areas under the legislation, the latter prevails.

Tags: AU, GIS Dataset Thematic, Geospatial Information Systems, HVC_144653, Published_External, marine
Organization: Australian Ocean Data Network
SSCN SEGMENT 2-C Nelson Marine Park Bathymetry Acquisition (20240017S)

This dataset is part of a broader survey carried out by EGS onboard the survey vessel RV Bold Explorer (RV BE) during the  SUBCO Subsea Cable Network (SSCN) cable route survey. 

The area is confined to the data within the Nelson&nbsp;Marine Park. The Survey team and client representative joined the RV Bold Explorer on 17th April 2024 at Fremantle Port,  Australia. Following the embarkation of the survey team, equipment testing and commissioning was carried out. Calibration and verification of the DGPS positioning system and survey gyros onboard RV BE were performed while the vessel was alongside at Fremantle Port, Australia between 17th April and 18th April 2024. 

Prior to departure, tow sensors and hull-mounted sensors were wet tested. All systems were found to be operational. The RV Bold Explorer departed Fremantle Port, Australia and transited to the first site on 19th April 2024. The offshore calibration of shallow water multibeam echosounder (MBES) and USBL were performed on 19th April 2024 while the  calibration of deep water MBES was carried out on 20th April 2024.

The SSCN Segment 2-C survey comprised an investigation of bathymetry, seabed features and shallow geology along the proposed route. A subsequent geotechnical sampling programme was also executed.

This dataset is not to be used for navigational purposes.

Tags: AusSeabed, Australia-wide geoscience data, EARTH SCIENCES, HVC_144641, Multibeam, Oceans, Offshore Mapping, Published_External, Resourcing Australia's Prosperity, bathymetry, marine
Organization: Australian Ocean Data Network
Physical Controls on Coral Communities on the George V Land Slope: Some Working Hypotheses

Dense coral-sponge communities on the upper continental slope off George V Land have been identified as a Vulnerable Marine Ecosystem in the Antarctic. The challenge is now to understand their likely distribution. The CEAMARC survey found these communities at sites on the upper slope in depths of 570 - 950m. Based on these results we propose some working hypotheses defining the physical settings suitable for such assemblages. Icebergs scour to 500m in this region and the lack of such disturbance is probably a factor allowing growth of rich benthic ecosystems. In addition, the richest communities are found in the heads of canyons. We suggest two possible oceanographic mechanisms linking abundant filter feeder communities and canyon heads. The canyons in which they occur receive descending plumes of Antarctic Bottom Water formed on the George V shelf and these water masses could entrain abundant food for the benthos. Maps of water properties measured during the Collaborative East Antarctic Marine Census (CEAMARC) survey provide some support for this idea. Another possibility is that the canyons harbouring rich benthos are those that cut the shelf break. Such canyons are known sites of high productivity in other areas because of a number of oceanographic factors, including strong current flow and increased mixing, and the abrupt, complex topography. These hypotheses provide a framework for the identification of areas where there is a higher likelihood of encountering these Vulnerable Marine Ecosystems.

Tags: AQ, Antarctic data, Earth Sciences, External Publication, Published_External, Report, abiotic surrogates, geomorphology, marine
Organization: Australian Ocean Data Network
Marine benthic communities in the Early Carboniferous of New South Wales (Visean-Delepinea aspinosa Zone)

The Delepinea aspinosa brachiopod Zone comprises two subzones: the Inflatia elegans and Linoprotonia tenuirugosa Subzones. Multivariate (cluster) analysis is used to identify benthic marine fossil communities (recurrent species associations) in samples collected from all known fossiliferous intervals of these subzones in the study area. The Euclidean distance coefficient, a weighted-pair grouping method, and a standardised data set are used to form dendrographic clusters inferred to represent recurrent species associations (communities). The results parallel those from faunas of the succeeding Rhipidomella fortimuscula Zone, i.e. several communities are evident and some species are numerically significant in more than one community.  The communities of each subzone appear to intergrade rather than form rigid, depth-limited assemblages.  Faunas of the I. elegans Subzone cluster into four communities, including the Unispirifer striatoconvolutus community, present in substrates near or below wave-base on a marine shelf. The I. elegans community is closest in species composition to the U. striatoconvolutus community, but does not occupy the same geographic range; it may be a precursor community. Two other communities, the Rhipidomella australis and Leptagonia analoga communities, overlap in range with the first two communities and are inferred to have occurred in a mid-shelf setting.  Faunas of the subsequent faunal assemblage, the Linoprotonia tenuirugosa Subzone, are present on marine shelf substrates influenced by an actively prograding shoreline.  The Rhipidomella australis community persisted into this subzone with a modified species composition. The Rugosochonetes careyi community is a new element.

Tags: Earth Sciences, GA Publication, Journal, NSW, Published_External, QLD, marine
Organization: Australian Ocean Data Network