Dunes and paleodunes of Unit 3a (D, Figs. 2, 4 and 7) rest on the gravel platforms of Unit 2 above ~3e4 m AHD, and were dated to 6e7 ka. They thus provide clear evidence for sustained sediment supply from the nearby creeks and/or active beach processes. This
implies that lake levels during this time were predominantly (or exclusively) below ~3e4 m AHD.