Figure 1

Map showing location of ODP Site 1146 and other important sites mentioned in the paper. The upper left panel contains the legend for the map. Ocean core locations ODP Site 1081 (South Atlantic, 19°37.2′S, 11°19.2′E, 793.8 m water depth), ODP site 717 (Bengal Fan, 0°56′S, 81°23′E, 4734.7 m water depth) and DSDP Leg 10 Site 94 (Gulf of Mexico, 24°20′N, 88°28.2′W, 1793 m water depth) mentioned in the text of the paper are not shown. The map was generated specifically for this paper using the ETOPO5 gridded elevation dataset (Version ETOPO5, http://www.ngdc.noaa.gov/mgg/global/etopo5.HTML) and Coreldraw (Version Coreldraw X7, http://www.corel.com/cn); no copyright problems are envisaged.