https://github.com/davepinch/pinchy.cc/blob/master/content/topics/places/islands/portage-island/portage-island.md
However, it is clear that the sediment eroded from the cliffs is transported northward around the eastern and western flanks of the island where it is deposited in the form of two “horn-like” features, Brant Point on the east and The Portage on the west.
Point Francis or Portage Island, on the southwest side of the bay, was studied by Vonheeder (1972). He found the south facing shoreline of the island to be eroding from southerly wave attack.
