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Submarine geomorphology and sea floor processes along the coast of Vestfold Hills, East Antarctica from multibeam bathymetry and video data

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Created 14/01/2025

Updated 14/01/2025

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Surveying of nearshore areas in the Vestfold Hills using high resolution multibeam swath bathymetry provides both a detailed digital bathymetric model and information on sediment acoustic backscatter. Combined with underwater video transects and sediment sampling, these data can be used to identify and map geomorphic units. Six geomorphic units identified in the survey region include: Rocky outcrops, sediment-floored basins, pediments, steep-sided valleys, scarps and sheltered embayments. In addition to geomorphic units, the data reveal sedimentary structures that provide insights into sediment transport and erosion in the area. Ice keel pits and scours are common while seafloor channels, scour depressions and sand ribbons indicate transport and deposition by wind-driven currents and oceanographic circulation. Gullies and sediment lobes on steep slopes indicate mass movement of sediment. The sheltered embayments preserve a mantle of boulder sand probably deposited by cold-based glaciers. Automated techniques utilizing the bathymetric grid and backscatter to map landforms are useful in defining reproducible boundaries between geomorphic units but cannot easily be adapted to accurately classify the variations in sea floor texture and structure imaged by these data.

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Title Submarine geomorphology and sea floor processes along the coast of Vestfold Hills, East Antarctica from multibeam bathymetry and video data
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/de075bdc-694f-445c-955d-dd7895756304
Contact Point
Geoscience Australia
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage {"type": "Polygon", "coordinates": [[[77.66666, -68.75], [78.16666, -68.75], [78.16666, -68.416666], [77.66666, -68.416666], [77.66666, -68.75]]]}
Data Portal data.gov.au

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This dataset was originally found on data.gov.au "Submarine geomorphology and sea floor processes along the coast of Vestfold Hills, East Antarctica from multibeam bathymetry and video data". Please visit the source to access the original metadata of the dataset:
https://devweb.dga.links.com.au/data/dataset/submarine-geomorphology-and-sea-floor-processes-along-the-coast-of-vestfold-hills-east-antarcti

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