“…The sediments at the crest of RGR are dominantly calcareous ooze (nannofossils and planktonic foraminifera) with a siliceous component (FLORINDO et al, 2015). The area is characterized by a strong northward flow of the AABW, which causes erosion of the bottom sediments (EMELYANOV, 2015). The RGR bottom environment and its polymetallic deposits are yet to be described and understood.…”