The park consists of three separate land and marine components. These are Oliver Sound, located to the south of Pond Inlet, characterised by a long narrow fjord flanked by towering cliffs and glaciers, the plateau and river valleys of the Borden Peninsula and Baillarge Bay, and finally Bylot Island, characterised by its rough terrain with mountains, coastal lowlands, icefields and glaciers. Hoodoos are unique eroded formations on Bylot Island and the Borden Peninsula. Evidence shows that the area was scoured by the Laurentide Ice Sheet, a massive sheet of ice that covered hundreds of thousands of square miles at least 20,000 years ago.