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)
Description
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.
Institutions
- Universidade Federal do Espirito Santo