Figure 1. Bathymetric map of the Manihiki Plateau.

Red circles show dredge sites of glass samples used for this study from the SO193 and SO225 expeditions. Yellow diamonds show additional dredge sites where low-Ti rock samples have been recovered and reported in ref. 4, and blue boxes show dredge sites where low-Ti rocks were recovered during the SO225 expedition, illustrating the large-scale distribution of low-Ti lavas at Manihiki. The contour lines denote depth intervals of 1,000 m with the thick black contour line showing a depth of 5,000 m below sea level. The map was created based on GEBCO bathymetry data⁶⁵.