Fig. 1: The subglacial topography and geology of West Antarctica.
From: Scars of tectonism promote ice-sheet nucleation from Hercules Dome into West Antarctica
a, Overview of the basins and provinces with formation ages of outcrops in West Antarctica overlying the ice-sheet bed topography. b, An overview map of Hercules Dome with interpolated aerogravity surface anomaly shown with composite MODIS (moderate-resolution imaging spectroradiometer) imagery54. Also plotted are the radar profiles (light orange) from this study and flight lines of aerogravity data (light blue) collected with airborne radar observations as part of the PolarGAP survey6,10. Inset shows the locations of panels a and b in Antarctica. Black arrows denote flow axis inferred from bedforms and the valley axis imaged in subglacial topography. Dark orange lines indicate the approximate position of the basin troughs probably associated with past tectonism. Ma, million years ago. Panel a adapted with permission from ref. 40, Springer Nature Limited.
