The imprint of sedimentary processes in the acoustic structure of deposits on a current-dominated continental shelf

Geomorphological imprint of opposing ocean bottom currents, a case study from the southeastern Brazilian Atlantic margin

“…The meandering pattern of the BC is evidenced by the occurrence of seawarddirected bedforms indicating the direction of sediment transport, suggesting sediment export from the shelf to the slope. Also, the erosional power of the BC was already confirmed in previous studies by Viana et al (1998a), de Mahiques et al (2004), and Dias de Araujo et al (2021), among others. Landward of the BC, the shelf is episodically swept by the northward-moving Brazilian Coastal Current (BCC in Fig.…”

“…South of the island, sediments are mostly derived from La Plata river runoff and transported by the Brazilian Coastal Current (de Mahiques et al, 2004;Souza and Robinson, 2004). Southeast of the island, sedimentation processes on the mid to outer shelf are mainly influenced by the BC meanders, whose activity has guided sediment transport processes and the development of bedforms (Dias de Araujo et al, 2021). Extensive reworking of the outer shelf by the BC (Fig.…”