AndreaBozzo/ceres-open-data-index huggingface dataset:
RV Investigator Voyage IN2026_V01 SBP29 Sub-bottom Profiler Data

This record describes sub bottom profiler data collected on RV Investigator voyage IN2026_V01, titled "Cook Ice Ecosystems and Sediments (COOKIES)." The voyage took place between January 02, 2026 and February 25, 2026 (AEST), departing from Hobart and returning to Hobart.

The Kongsberg SBP29 (sub bottom profiler) was used to acquire data containing the specular reflections at different sediment interfaces below the seafloor. The SBP29 provides a 3° by 3° angular resolution.

The echosounder's frequency sweep range is from 2.5 to 7 kHz. The SBP29 was logged continuously for the extent of the voyage.

Data are stored in .raw (1079 files 20.2 GB) raw and .seg (1075 files 20.1 GB) segy formats at CSIRO.

The segy format data had a real time processing stream applied, which applies gain, a gain correction, matched filter with replica shaping, an attribute calculation for instantaneous amplitude and time variable gain.

Additional information regarding this dataset is contained in the GSM data acquisition and processing report. Additional data products may be available on request

Organization: Australian Ocean Data Network
Late Permian palynozones and associated CA-IDTIMS dated tuffs from the Bowen Basin, Australia

As part of a continuing program to date Permian plant microfossil zones using CA-IDTIMS dating, 11 tuff and 18 sedimentary core samples were examined from the Bowen Basin succession intersected in APLNG Meeleebee 5, a CSG well spudded in the Surat Basin, Queensland. The Bowen Basin consists of terrestrial and marine sediments interspersed with numerous tuff layers and economic coal seams. Palynological strew-slides were examined using a light microscope to identify taxa. Quantitative analyses, with counts up to 100 specimens, were undertaken. Almost all the plant microfossil assemblages analysed from the Meeleebee 5 core belong to the Price (1997) APP5 spore-pollen zone, and one may belong to the younger APP6 zone. The APP5 index species, Dulhuntyispora parvithola was present throughout the section. The APP5005 index species Microreticulatisporites bitriangularis was also present in many samples and the Micrhystridium evansii acme event was readily identified. Triquitrites proratus, a species usually restricted to APP6, was identified near the top of the succession, although no other species typical of APP6 were found. When compared with CA-IDTIMS tuff ages, the Dulhuntyispora parvithola zone spans around five million years, almost extending to the Permian-Triassic boundary. Additionally, the Microreticulatisporites bitriangularis Subzone and Microstridium evansii event are both younger than previously estimated. By combining the results of the palynology and CA-IDTIMS dating, numeric ages are attached to palynostratigraphic units, aiding regional and global correlations of the palynofloras and economic coal-bearing sequences of the basin.

Tags: AU-QLD, Earth Sciences, GA Publication, Published_External, Record, environmental, geochronology, palaeontology
Organization: Australian Ocean Data Network
Solitary Islands Gumbaynggirr Yaegl MP Bathymetry and Backscatter Acquisition (20220017S)

The Solitary Islands Gumbaynggirr Yaegl MP bathymetry survey was acquired by the NSW government (Department of Planning and Environment – DPE) onboard the RV Bombora during the period 31 Aug 2022 – 31 Jul 2023, using DPE’s R2Sonic 2022 multibeam sonar. The survey was completed as part of the SeabedNSW program funded by NSW government through Coastal Reforms (&gt;2015), HabMap Program funded through Marine Parks Authority (now under Marine Estate Management Authority) or through collaborations with partner agencies or institutions. The purpose of the project was to 1) provide a baseline dataset and 2) map the spatial distribution of seabed types.  This dataset contains 32-bit floating point geotiff files of bathymetry and backscatter in 5m resolution for the study area, derived from the processed Hypack, R2Sonic GUI, POSView, POSPac, Qimera and FMGT software. General details on vessel setup, mobilisation and processing are provided at https://www.environment.nsw.gov.au/-/media/OEH/Corporate-Site/Documents/Research/Our-science-and-research/seabed-nsw-standard-operating-procedures-multibeam-surveying-190101.pdf with survey specific details in the Survey Report and DPIE Rigor Statement (can be provided upon request).
This dataset is not to be used for navigational purposes.

Tags: AusSeabed, EARTH SCIENCES, Earth Science | Oceans | Bathymetry/Seafloor Topography | Bathymetry, HVC_144641, Multibeam, Oceans, Published_External, backscatter, bathymetric grids, bathymetry
Organization: Australian Ocean Data Network
Permian fossiliferous rocks from near the south-west margin of the Canning Basin, Western Australia

Late Palaeozoic fossils have been recorded previously from near the south-west margin of the Canning Basin. Glauert (1926, p.43-48) records and lists brachiopods and a nautiloid collected by L.J. Jones from near No. 27 Well, Canning Stock Route, north-east of Lake Disappointment. Reeves (1949, Appendix, p.34) records Ammodiscus nitidus collected by him from 4 miles north-east of No. 6 Well, Canning Stock Route. He considered that the rocks here were equivalent to the Noonkanbah Formation of the Fitzroy Basin. During the 1954 field season J.N. Casey, a member of the Bureau Field Party operating in the Canning Basin composed of D.M. Traves, J.N. Casey and A.T. Wells, collected marine shelly fossils from two additional localities which were handed to the authors for identification and age determination. The two collections confirm the presence of marine Permian rocks in this area.

Tags: AU-WA, Earth Sciences, GA Publication, Published_External, Record, palaeontology
Organization: Australian Ocean Data Network
Use MODIS data to investigate the spatial and temporal variability of the Bonney Coast Upwelling

The Bonney Coast upwelling is a large seasonal upwelling system along Australian southern shelves, from Cape Jaffa (SA) to Cape Nelson (VIC), during favourable coastal winds. The Bonney Coast upwelling, with nutrient enriched water, has been recognised as a key ecological feature. During the upwelling season (Austral Summer), swarms of krill and aggregation of blue whales are frequently found in this part of continental shelf. The upwelling is also important in the life cycle of juvenile southern Bluefin tuna and benefits other marine life. The oceanographic characteristics of the Bonney Coast upwelling are well understood through marine surveys and mooring data, as well as satellite images. However, the systematic and accurate mapping and understanding of the dynamic of the upwelling system has not been conducted. This study aims to map and investigate the spatial and temporal variability of the Bonney Coast upwelling using time-series of MODIS data. The data include more than 170 SST and Chlorophyll-a images (from July 2002 to Dec 2016), with a spatial resolution of ~1km. A combination of Topographic Position Index (TPI) and image segmentation techniques was used to map the spatial extent of the Bonney Coast upwelling. The Chlorophyll-a and SST signatures of the upwelling areas have also been extracted.  The results confirmed that the Bonney Coast upwelling is indeed a seasonal system occurred between November and April. The upwelling is often most intensive in February and March. There is strong inter-annual variation. For example, in the summer of 2008-09, upwelling was only identified in February 2009; while, in the summers of 2013-14 and 2015-16, the upwelling was identified in all of the six months. Whether this inter-annual variation is influenced by the ENSO events is under further investigation. During intensive upwelling events (e.g., in Feb and Mar), the upwelling influences more than 10,000 km2 surface area, with the SST anomaly more than 1oC lower than that of its surrounding areas. The upwelling areas often have mean Chlorophyll-a concentrations over 0.8 mg/m3 which is nearly double of the mean summer Chlorophyll-a concentration in Australian continental shelf.

This abstract was submitted/presented to the 2017 Australian Marine Science Association Conference - AMSA (https://www.amsa.asn.au/2017-darwin)

Tags: Bonney Coast, EARTH SCIENCES, MODIS, Published_External, remote sensing, upwelling
Organization: Australian Ocean Data Network
Late Neogene Ice Drainage Changes in Prydz Bay, East Antarctica and the Interaction of Antarctic Ice Sheet Evolution and Climate

During the late Neogene, the Lambert Glacier-Amery Ice Shelf drainage system flowed across Prydz Bay and showed several changes in flow pattern. In the Early Pliocene, the Lambert Glacier ice stream reached the shelf edge and built a trough mouth fan on the upper continental slope. This was associated with an increase in ice discharge from the Princess Elizabeth Land coast into Prydz Bay. The trough mouth fan consists mostly of debris flow deposits derived from the melting out of subglacial debris at the grounding line at the continental shelf edge. The composition of debris changes at around 1.1 Ma BP from material derived from erosion of the Lambert Graben and Prydz Bay Basin to mostly basement derived material. This probably results from a reduction in the depth of erosion and hence the volume of ice in the system. In the trough mouth fan, debris flow intervals are separated by thin mudstone horizons deposited when the ice had retreated from the shelf edge. Age control in an Ocean Drilling Program hole indicates that most of the trough mouth fan was deposited prior to the Brunhes Matuyama Boundary (780 ka BP). This stratigraphy indicates that extreme ice advances in Prydz Bay were rare after the mid Pleistocene, and that ice discharge from Princess Elizabeth Land became more dominant than the Lambert Glacier ice in shelf grounding episodes, since the mid Pleistocene. Mechanisms that might have produced this change are extreme inner shelf erosion and/or decreasing ice accumulation in the interior of East Antarctica. We interpret this pattern as reflecting the increasing elevation of coastal ice through time and the increasing continentality of the interior of the East Antarctic Ice Sheet. The mid Pleistocene change to 100 ka climatic and sea level cycles may also have affected the critical relationship between ice dynamics and the symmetry or asymmetry of the interglacial/glacial climate cycle duration.

Tags: AQ, Antarctic data, Earth Sciences, External Publication, Published_External, Scientific Journal Paper, bathymetry, geomorphology, marine, sedimentary basins
Organization: Australian Ocean Data Network
The Lord Howe Rise: newly-acquired multi-channel and wide-angle seismic data to study an enigmatic continental ribbon

The Lord Howe Rise (LHR) is located to the east of Australia in water depths up to 3,000 m. The LHR is a 600 km wide and 1,600 km long continental ribbon that detached from eastern Gondwana by the Late Cretaceous. The driving forces that led to the breakup between the LHR and eastern Gondwana are not fully understood, but span two end-member processes: (1) slab rollback associated with back-arc extension; (2) a plume impinging the lithosphere.

To better understand the driving mechanism, a large set of marine geophysical data were acquired onboard the JAMSTEC vessel R/V Kairei in March–May 2016, in collaboration with Geoscience Australia. These data include:
* A 680 km long east-west oriented profile at ~27.2°S along which wide-angle seismic refraction data (~100 ocean-bottom seismometers (OBS)) were acquired conjointly with multi-channel seismic (MCS) reflection data;
* ~600 km of high-resolution 2D seismic reflection data at seven sites being
considered for IODP drilling;
*Multibeam bathymetry, gravity and magnetic data.

We present preliminary results obtained from a combined interpretation of OBS modeling and MCS along the east-west profile. The MCS profile produced a good image of the rift-fill sedimentary deposits and the acoustic basement from the Tasman Sea across the Dampier Ridge, the Middleton, Capel and Faust basins and the Lord Howe Platform to the east. With the OBS data, clear reflected arrivals from the basement and the mantle (Pn) are recorded at a very large offset (up to 250 km), with a strong Moho reflected arrival (PmP). Preliminary interpretation of these datasets suggests that the nature of the basement varies from oceanic crust to (thin?) continental crust, in agreement with previous geophysical studies of the area.

Further processing and modeling of the data will constrain the geometry of the main sedimentary basins and the nature of basement. This ongoing work is in support of an IODP proposal to drill through a rift basin and into the basement of the LHR. The processes of LHR crustal ribbon development will be investigated using rock cores recovered from up to 3,500 m below the seafloor.

Presented at the 2016 Seismological Society of Japan (SSOJ) Fall Meeting

Tags: EARTH SCIENCES, International Ocean Discovery Program, Lord Howe Rise, geophysics
Organization: Australian Ocean Data Network
Compilation and production of the 1976 1:5 000 000 Gravity Map of Australia

In 1976 a coloured 1:5 000 000 Gravity Map of Australia was published by BMR. At that stage the systematic reconnaissance gravity coverage of Australia, initiated by BMR in 1959, was complete, and preliminary gravity values were available from marine coverage of the continental shelf and margins. The map was based on approximately 260 000 gravity observations obtained by various organisations at a cost of about $12 000 000 from 300 surveys. It was produced using a CDC Cyber 76 computer system, Calcomp plotters and cartographic techniques. The computer processing phase took about four months and the cartography about three months. The coloured 1:25 000 000 Bouguer and free-air anomaly maps contained in this issue were also produced from the same data bank.

Tags: AUS, Earth Sciences, GA Publication, Journal, Published_External
Organization: Australian Ocean Data Network
Seabed Environments of the Eastern Joseph Bonaparte Gulf, Northern Australia

A seabed mapping survey over a series of carbonate banks, intervening channels and surrounding sediment plains on the Van Diemen Rise in the eastern Joseph Bonaparte Gulf was completed under a Memorandum of Understanding between Geoscience Australia and the Australian Institute of Marine Sciences. The survey obtained detailed geological (sedimentological, geochemical, geophysical) and biological data (macro-benthic and infaunal diversity, community structure) 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. The survey also permits the biodiversity of benthos of the Van Diemen Rise to be put into a biogeographic context of the Arafura-Timor Sea and wider northern Australian marine region.

Four study areas were investigated across the outer to inner shelf. Multibeam sonar data provide 100 per cent coverage of the seabed for each study area and are supplemented with geological and biological samples collected from 63 stations. In a novel approach, geochemical data collected at the stations provide an assessment of sediment and water quality for surrogacy research. Oceanographic data collected at four stations on the Van Diemen Rise will provide an understanding of the wave, tide and ocean currents as well as insights into sediment transport. A total of 1,154 square kilometres of multibeam sonar data and 340 line-km of shallow (&lt;100 mbsf) sub-bottom profiles were collected.

Tags: AU-WA, Earth Sciences, GA Publication, GIS, Published_External, Record, backscatter, bathymetry, environmental, marine, marine biodiversity, marine survey, seabed
Organization: Australian Ocean Data Network
Epeiric carbonate sedimentation of the Ninmaroo Formation (Upper Cambrian-Lower Ordovician), Georgina Basin

The Ninmaroo Formation (Upper Cambrian-Lower Ordovician) is one of several epeiric carbonate sequences in the Georgina Basin. It comprises ooid, peloid, flat-pebble conglomerate, skeletal and mixed carbonate lithofacies, terrigenous sandstones, and a late diagenetic crystalline dolostone lithofacies. Ninmaroo sedimentation took place in a broad, shallow epicontinental sea under normal marine, increasingly saline, and evaporitic conditions. A barrier complex of ooid, peloid and skeletal sands formed the seaward limit of these environments. Channels through this barrier extended weak tidal effects to the periphery of an extensive, non-tidal complex of semi-emergent shoals in a patchwork pattern, Here, algal and nonskeletal carbonate sedimentation predominated because higher salinities restricted the fauna. Sedimentation was cyclic, probably due to repeated shoaling from storms. Sabkhas developed locally on emergent areas of shoals and landward where the complex was transitional with an emergent pavement. Where emergence was prolonged, microkarst resulted with both carbonate and sulphate dissolution. Lithofacies patterns indicate two regressive depositional sequences. An initial southeastern progradation of the barrier and epeiric environments was over a stable and extensive flat shelf. Subsequent instability increased shelf slope locally, and depositional environments along margins were condensed. With increased tidal circulation, skeletal carbonate production became dominant, producing a second offlap to the southeast.

Tags: Earth Sciences, GA Publication, Journal, NT, Published_External, QLD
Organization: Australian Ocean Data Network
Methane anomalies in seawaters of the Ragay Gulf, Philippines: methane cycling and contributions to atmospheric greenhouse gases

The vertical distribution of methane has been measured in the water column of a semi-enclosed basin, the Ragay Gulf, in the Philippines archipelago. The methane distribution is characterised by unusual mid-water and bottom-water plumes, between 80 and 100 m thick. The plumes are confined to water depths between about 100 and 220 m, where the temperature-depth (a proxy for seawater density) gradient is steepest. Plumes of high methane are trapped within the main thermocline; these are local features, persisting over kilometre-scale distances. Geochemical and geological evidence suggests that the elevated methane concentrations are thermogenic in origin (although an oxidised biogenic origin cannot be ruled out for some of the methane anomalies), and have migrated from the sea floor into the overlying water.  The mid and bottom-water methane maxima support fluxes of methane from depth into surface waters and, subsequently, from the oceans to the atmosphere. The average supersaturation of methane in the top 5 m of the sea, at nine locations , was 206Â±16.5%; range 178- 237%. The average estimated sea- air flux was 101 nmole.cm-2.y-1; range 75- 129 nmole.cm-2.y-1, and probably represents a minimum flux, because of low wind speeds of &lt; 10 knots. These fluxes, we suggest, are supported by seepage from the sea floor and represent naturally occurring fluxes of mostly fossil methane (in contrast to anthropogenic fossil methane), from the sea to the atmosphere.  The estimated minimum fluxes of naturally occurring fossil methane are comparable to those biogenic fluxes measured elsewhere in the surface oceans , but are less than those naturally occurring methane inputs from sediments of the Barents Sea. Ragay Gulf fluxes are also less than anthropogenic fluxes measured in areas of petroleum exploration and development, such as the Texas and Louisiana, USA shelf areas.

Tags: Earth Sciences, GA Publication, Journal, PHIL, Published_External, marine
Organization: Australian Ocean Data Network
Geology of the Surat Basin in Queensland

The Surat Basin of eastern Australia contains 2500 m of Jurassic and Cretaceous sediments, terrestrial during the Jurassic, but showing two marine incursions during the Early Cretaceous. The sequence is almost flat-lying; the gentle basinward dip is modified by a few drape or compaction folds and faults. Deposition during the Jurassic was dominantly fluviatile and consisted of fining-upward megacycles, each more than 100 m thick. Volcanic debris suggests contemporaneous volcanism in both the Jurassic and the Early Cretaceous. Sedimentation gave way to erosion during the Late Cretaceous and Early Tertiary, and the rocks were deeply weathered. In the Oligocene and Miocene, basin volcanicity around the margins of the Basin accompanied epeirogenic basinward tilting; since then the basin has been stable. Petroleum reserves in the basin in 1974 were estimated as 51 billion m3 of gas and 31 million m3 of oil. The Walloon Coal Measures hold considerable reserves of bituminous coal and some of oil shale.

Tags: AU-QLD, Bulletin, Earth Sciences, GA Publication, Published_External, geology
Organization: Australian Ocean Data Network
Redmap (Victoria) - Sightings of Algae and Plant Species

Redmap is a primarily a website that invites the community to spot, log and map marine species that are uncommon in their region, or along particular parts of their coast. The information collected is mapped and displayed on the site, demonstrating, in time, how species distributions may be changing.

Sightings are divided into two categories – those with a photo that can be ‘verified’ by a marine biologist, and sightings without photos that we call community sightings (anecdotal). All the information collected, with and without photos, is mapped and will be used in the following years to map out a ‘story’ of changes occurring in our marine environment.

The main data collected includes the species sighted (normally selected from a list comprising preselected species of interest), the location, date/time and activity being undertaken.  Other optional information gathered include biological data such as sex, size and weight and environmental data such as water depth and temperature and habitat.

This record is associated with live data (and will subsequently change over time) and spatial elements have reduced accuracy.  It is also subject to a three year embargo (ie. does not contain data less than three years old).  If you wish to discuss obtaining a citable, static dataset, that is current and/or contains accurate spatial elements, please see Point of Contact.

Tags: Hand Sampling, body_length, body_weight, climate change, range shift, species distribution, fishing, latitude, longitude
Organization: Australian Ocean Data Network