<div>The Abbot Point to Hydrographers Passage bathymetry survey was acquired for the Australian Hydrographic Office (AHO) onboard the RV Escape during the period 6 Oct 2020 – 16 Mar 2021. This was a contracted survey conducted for the Australian Hydrographic Office by iXblue Pty Ltd as part of the Hydroscheme Industry Partnership Program. The survey area encompases a section of Two-Way Route from Abbot Point through Hydrographers Passage QLD. Bathymetry data was acquired using a Kongsberg EM 2040, and processed using QPS QINSy. The dataset was then exported as a 30m resolution, 32 bit floating point GeoTIFF grid of the survey area.</div><div>This dataset is not to be used for navigational purposes.</div>

This service has been created specifically for display in the National Map and the chosen symbology may not suit other mapping applications. The Australian Topographic web map service is seamless national dataset coverage for the whole of Australia. These data are best suited to graphical applications. These data may vary greatly in quality depending on the method of capture and digitising specifications in place at the time of capture. The web map service portrays detailed graphic representation of features that appear on the Earth's surface. These features include the administration boundaries from the Geoscience Australia 250K Topographic Data, including state forest and reserves.

Geoscience Australia carried out a marine survey on Carnarvon shelf (WA) in 2008 (SOL4769) to map seabed bathymetry and characterise benthic environments through colocated sampling of surface sediments and infauna, observation of benthic habitats using underwater towed video and stills photography, and measurement of ocean tides and wavegenerated currents. Data and samples were acquired using the Australian Institute of Marine Science (AIMS) Research Vessel Solander. Bathymetric mapping, sampling and video transects were completed in three survey areas that extended seaward from Ningaloo Reef to the shelf edge, including: Mandu Creek (80 sq km); Point Cloates (281 sq km), and; Gnaraloo (321 sq km). Additional bathymetric mapping (but no sampling or video) was completed between Mandu creek and Point Cloates, covering 277 sq km and north of Mandu Creek, covering 79 sq km. Two oceanographic moorings were deployed in the Point Cloates survey area. The survey also mapped and sampled an area to the northeast of the Muiron Islands covering 52 sq km. cloates_3m is an ArcINFO grid of Point Cloates of Carnarvon Shelf survey area produced from the processed EM3002 bathymetry data using the CARIS HIPS and SIPS software

Legacy product - no abstract available

Geoscience Australia and the National Oceans Office carried out a joint venture project to produce a consistent, high-quality 9 arc second (0.0025° or ~250m at the equator) bathymetric data grid of those parts of the Australian water column jurisdiction lying between 92E & 172E and 8S & 60S. As well as the waters adjacent to the continent of Australia and Tasmania, the area selected also covers the area of water column jurisdiction surrounding Macquarie Island, and the Australian Territories of Norfolk Island, Christmas Island, and Cocos (Keeling) Islands. The area selected does not include Australia's marine jurisdiction off of the Territory of Heard and McDonald Islands and the Australian Antarctic Territory. This report provides a list of the datasets and procedures used to produce a grid of 9 arc second cell dimensions. The underlying data from which this grid is derived can only support this resolution in areas where direct bathymetric observations are sufficiently dense (eg. where swath bathymetry data or digitised chart data exist). In areas where only track-line data exist, the grid resolution is high along-line but low perpendicular to lines. In areas where no sounding data are available, the grid is based on interpolated or indirectly observed bathymetry, and these data can only support a resolution of 2 arc minutes (2 nautical miles or ~3.7 km). The grid covers an area of approximately 41 million square kilometres. Its dimensions are 32003 x 20803 cells resulting in a file size slightly in excess of 1.3 Gb of 2-bytes integer numbers representing the bathymetric values. The grid synthesises approximately 1.7 billion observed data points. This grid is not suitable for use as an aid to navigation, or to replace any products produced by the Australian Hydrographic Service.

The 50 000 km? East Tasman Plateau (ETP) is a roughly circular continental block, about 200 km across, that lies in water depths of 2200-2800 m. A variety of continental rocks including gneissic granite have been dredged from the plateau?s margins. The plateau is like a giant saucer, with basement rocks around the margin and sediments filling the central depression. The plateau supports Cascade Seamount, a late Eocene guyot that is probably related to the trace of the Balleny mantle plume. Seismic profiles suggest that the central plateau subsided under the weight of the guyot. Geophysical and petrological evidence suggest that the plateau was adjacent to the South Tasman Rise and the Tasmanian block until it was transported about 130 km east-northeast (relative to Tasmania) during early formation of the Tasman Basin in the Late Cretaceous (95-83 Ma), as part of the breakup of East Gondwana. Stretching and seafloor spreading formed the L?Atalante Depression between the plateau and the rise, and the East Tasman Saddle between the plateau and the Tasmanian block. Lord Howe Rise to the east separated from the East Tasman Plateau at ~83 Ma, as part of Tasman Basin spreading. The drilling of continuously cored ODP Site 1172 in 2000 has greatly improved our understanding of the ETP, giving us control down to the Late Cretaceous. The site was in 2620 m water depth and about 40 km west of the summit of Cascade seamount. Total depth was 766 m. Seismic profiles show that more than 3000 m of strata are preserved above basement in the central plateau, and most are probably of Cretaceous age. Our interpretations suggest that this area deep within Gondwana was blanketed by Late Cretaceous clastic sediments before there was a burst of volcanism at ~85 Ma during early rifting, followed by further clastic sedimentation and the documented onset of marine sedimentation. Site 1172 evidences the latest Cretaceous and younger history of the plateau. The sea was very shallow initially, but deepened slowly during Maastrichtian to middle Eocene times, more rapidly to outer shelf depths in the late Eocene, and very rapidly to bathyal depths in the Oligocene. Detrital input completely dominated the older sediments, and pelagic carbonate rain dominated the Oligocene and younger ones. The change is related to the final opening of the Tasmanian Gateway as Australia moved northward away from Antarctica, but mechanisms are still being assessed. Palynomorphs and diatoms characterise the detrital sediments, but nannofossils and planktonic forams the carbonates. The fossils show that the region was warm to temperate through the Maastrichtian to Eocene, and then cooled as climate gradually deteriorated. Site 1172 contains about 70 m of Maastrichtian marine and paralic mudstone, 315 m of early Paleocene to middle Eocene shallow marine mudstone, 20 m of late Eocene glauconitic shallow marine and condensed siltstone and sandstone, and 360 m of Oligocene and younger pelagic carbonates. Sedimentation rates were ~1.5 cm/ka in the Maastrichtian to middle Eocene, and generally very low thereafter. Major hiatuses occur in the mid Paleocene, early Oligocene and late Miocene.

3-6 July, 2001, Townsville, Qld.

Atlas of Glacimarine Features. Editors: T. A. Davies, T. Bell, A. K. Cooper, H. Josenhans, L. Polyak, A. Solheim, M. S. Stoker, & J. A. Stravers

No abstract available

This article is the introduction to a special issue of Continental Shelf Research containing papers giving research results produced as part of Australia's Torres Strait Co-operative Research Centre (CRC) Program.