This data was curated and processed towards the development of a PhD manuscript entitled "High resolution bathymetry reveals the geomorphology and geological structure of the abyssal seafloor southwest of Tasmania" as part of an HDR candidature.

The core dataset is multibeam bathymetry data from CSIRO/MNF RV Investigator voyages (IN2015_E02, IN2015_V01, IN2016_V02, IN2017_C01, IN2017_T02, IN2017_V01, IN2017_V02, IN2018_V02, IN2018_V04, IN2018_V05, IN2018_V06, IN2018_V07, IN2019_T01, IN2019_V01, IN2019_V02, IN2020_V08, IN2020_V09, IN2020_V10, IN2021_V01, IN2021_V02, IN2022_V03, IN2023_V01, IN2023_V02, IN2023_V03, IN2023_V04, IN2024_T01, IN2024_V02) and augmented with multibeam bathymetry data from the "50m Multibeam Dataset of Australia 2018" (Parums, R., and Spinoccia, M. (2018). 50m Multibeam Dataset of Australia 2018. doi: 10.26186/5c63832e3ed8e).

These datasets were combined, cleaned and gridded as a single compiled 50 m bathymetric grid covering an area of ~170,000 km². From this core dataset, various derivatives (e.g. slope, curvature, aspect) were extracted and used to produce a structural geological and geomorphological characterisation of the abyssal seafloor study area ~500 km SW of Tasmania. This was achieved with the use of semi-automated characterisation techniques, including BRESS and GA-SaMMT.

***EMBARGO NOTE*** Data is embargoed until 31st November 2026 and will be made available following this date.