New Zealand fjords (Fig. 1e) contain submerged, relict, proglacial lacustrine and marine deltas that formed after glaciers retreated from the west coast by 17 ka (Pickrill et al. 1992). Many of these deltas, for example those in Bradshaw and George sounds, are exceptionally well preserved because postglacial sedimentation rates have been low. Fig. 1. Relict proglacial deltas in Bradshaw and George sounds, Fiordland, New Zealand. ( a ) Swath-bathymetric image of the head of George Sound superimposed on a hill-shaded DEM. Acquisition system Kongsberg EM300. Frequency 30 kHz. Grid-cell size 5 m. EB, Elder Basin; WB, Whitewater Basin; SWB, South-West Basin; AD, Anchorage Delta; WD, Whitewater Delta; SWAD, South-West Arm Delta; ALD, Alice Delta; AF, Alice Falls. ( b ) Head of Bradshaw Sound. BB, Bradshaw Basin; GAD, Gaer Arm Delta; PD, Precipice Delta. ( c ) Long-axis profile from EB to Lake Alice (LA), across the relict proglacial ALD and WB. VE×11. ( d ) Long-axis profile across the modern and relict proglacial components of GAD. VE ×10. ( e ) Location of study area (red box; map from GEBCO_08). ( f ) Enlargement showing bathymetric details of the AD foreset slope off Anchorage Cove. ( g ) Head …