Deep-Sea Erosion and Manganese Nodule Development in the Southeast Indian Ocean

Science  06 Jun 1975:
Vol. 188, Issue 4192, pp. 1011-1013
DOI: 10.1126/science.188.4192.1011


Features exhibited by a large number of sea floor photographs together with the dating of 187 sediment cores from the southeast Indian Ocean have revealed extensive manganese nodule development and sediment erosion in deep basinal areas. The most extensive nodule field, with an area of 106 square kilometers, occurs in the northwestern sector of the South Australian Basin and is named the Southeast Indian Ocean Manganese Pavement. The crests and flanks of the adjacent mid-ocean ridge are, in contrast, free of nodules and marked by much less dynamic bottom water conditions.