Fig. 5: 3D view of Larsen C Ice Shelf and Joerg Peninsula and the predominant orientation of each unit at each site.

The main insets show the primary eigenvector for each unit (Supplementary Table 1), coloured as in Fig. 3. As layers dip progressively through Unit 2, the unit is expanded further, with five layers selected at equal intervals to illustrate the progressive increase in dip with depth down the unit. While most Unit 2 layers conform to the orientations shown in the expanded panel for SI-47, several are oriented at ~180° to this orientation while maintaining a similarly increasing dip with depth (see Fig. 3C and D and tadpole plot in Supplementary fig. 3). Dark blue lines indicate the flowline for each site, produced from mean Sentinel-1 feature-tracked velocities for 2021. The view direction is from Antarctic Polar Stereographic North to South (geographic East to West). The hillshade of surface elevation is from TanDEM-X interferometry using scenes from 2012 and 2022 (exaggerated vertically by a factor of 3).