Book ChapterSite U1578 Sager, W.; Hoernle, K.; Höfig, T.W.; Avery, A.J.; Bhutani, R.; Buchs, D.M.; Carvallo, C.A.; Class, C.; Dai, Y.; Dalla Valle, G.; Del Gaudio, A.V.; Fielding, S.; Gaastra, K.M.; Han, S.; Homrighausen, S.; Kubota, Y.; Li, C.-F.; Nelson, W.R.; Petrou, E.; Potter, K.E.; Pujatti, S.; Scholpp, J.; Shervais, J.W.; Thoram, S.; Tikoo-Schantz, S.M.; Tshiningayamwe, M.; Wang, X.-J.; Widdowson, M.The strategy for International Ocean Discovery Program (IODP) Expedition 391 was to drill at three distributed locations on Walvis Ridge and one in the Guyot Province, providing an age transect along the Tristan-Gough-Walvis (TGW) hotspot track. Site U1578 (proposed Site CT-5A) is located on the deep northwestern flank of an unnamed guyot that is part of the Center track, a ridge between the Tristan and Gough seamount tracks, southwest of where Walvis Ridge splits (Figures F1, F2).International Ocean Discovery Program2023-10-1110468484Proceedings of the International Ocean Discovery Program Expedition reports3911062377-3189https://doi.org/1326927International Ocean Discovery ProgramIODPJOIDES ResolutionExpedition 391Walvis Ridge HotspotSite U1578Earth ConnectionsTristan-Gough-Walvis Hotspottrue polar wanderisotopic zonationlarge low shear-wave velocity provinceLLSVPvolcaniclasticshyaloclastitetephrapillow lava flowmassive lava flowvery high-Ti basaltfresh olive phenocrysts and volcanic glasspicriteNational Science Foundation