Figure 1: Bathymetric map of the South Atlantic Ocean and its margins showing the Tristan-Gough hotspot track.
From: How and when plume zonation appeared during the 132 Myr evolution of the Tristan Hotspot
The map shows the Tristan-Gough hotspot track including the ∼132 Myr (ref. 22) old Etendeka and Parana continental flood basalt provinces, the Rio Grand Rise and Walvis Ridge (both within the age range ∼60–115 Ma), the Guyot Province at the southwestern end of the Walvis Ridge containing the Tristan da Cunha and Gough Island groups (∼0–60 Ma)24. Ages for late-stage volcanism are not shown. Age range in italics (87–107 Ma) is estimated using a spatial age progression equation24. Sample locations are denoted by symbols: large symbols this study and small symbols as reported in ref. 13. Source of base map is http://www.geomapapp.org. All sites are from the Deep Sea Drilling Project. The scale bar in the lower right hand corner indicates a distance of ∼500 km.
