Grid of MBES bathymetric data used to investigate the influence of the MWP-1C event on occurrence of drowned reefs along the eastern Brazilian margin (California Reef area)

Published: 29 September 2023| Version 1 | DOI: 10.17632/3mffsns8h5.1
Paulo Cetto,


Bathymetric grid with mesh of 5 meters. Data surveyed with Multibeam Echosounder Reson 7101-240 kHz on a sector of California Reef, Abrolhos continental shelf, eastern Brazilian margin. Geodesy: Universal Transverse Mercator (UTM) coordinate system, Zone 24S, WGS84 datum. Column A: XCoordinate Column B: YCoordinate Column C: Depth* *OBS. -9999 identify nodes without depth data on Column C


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The present work investigates the possible repercussions of the MWP-1C and the 8.2K events on the occurrence of drowned reefs on the far-field eastern Brazilian margin. A bathymetric survey was conducted along a sector of the Abrolhos continental shelf known as California Reef using a multibeam echosounder (Reson 7101-240 kHz), covering an area of approximately 20 km2. Data were processed using Caris HIPS & SIPS 9.1, and a workflow was applied, including patch test correction, tidal elevation, measured sound velocity, and spikes removal. A 5 m mesh grid was generated through natural neighbourhood interpolation in Surfer 13 software (without gap-filling between navigation lines). The analysis was based on comparing of RSL curves available in the literature with high-resolution depth signatures of different geomorphometric classes recognized in the California Reef survey area. Thus, it was possible to infer evolutionary patterns according to the sea level change.


Universidade Federal do Espirito Santo


Marine Geology