Berkner Island or Berkner Ice Rise or Hubley Island is an ice rise, where bedrock below sea level makes the ice dome upward. If the ice cap melted, it would be under water. Berkner "Island" is high and completely ice-covered and about 320 kilometres (200 mi) long and 150 kilometres (93 mi) wide, with an area of 44,000 km² (17,000 sq mi). Berkner is surrounded by the Filchner-Ronne Ice Shelf. The northernmost point of the Berkner is about 20 kilometres (12 mi) from the open sea.