Fig. 5: Δ Age of RGR and WR samples.
From: 40Ar/39Ar dating reveals over 30 million years of plume-ridge interaction formed the Rio Grande Rise
a Sample age vs Δ age for RGR (gray symbols) and WR (black circles = Gough track, white squares = Tristan track). The shaded blue region is considered on axis. Walvis Ridge ages are from refs. 6,7,10,20,21 and RGR literature ages are from refs. 7,10,12. b Bathymetric map showing the locations and Δ age (colors of symbols) of all samples with ages from RGR and Walvis Ridge. Symbols are the same as A), the MAR is the red line down the center and gray lines are fracture zones. Map made in GMT70.
