Portsea Hole

Portsea Hole
Map showing the location of Portsea Hole
Portsea Hole, located off the coast of Victoria, Australia
Location Port Phillip Heads Marine National Park, Port Phillip, Victoria
Coordinates 38°18′39″S 144°42′40″E / 38.3109°S 144.7111°E / -38.3109; 144.7111Coordinates: 38°18′39″S 144°42′40″E / 38.3109°S 144.7111°E / -38.3109; 144.7111
Elevation descends 20–32 m (66–105 ft)[1]
Length 400 metres (1,300 ft)[2]
Width 250 metres (820 ft)[2]
Area 10 hectares (25 acres)[2]
Operator Parks Victoria
Designation IUCN II – marine park
Website Portsea Hole at Parks Victoria

The Portsea Hole is a depression in the seafloor of Port Phillip near Portsea in Victoria, Australia. The undefined area of the depression, generally assessed at 10 hectares (25 acres), is one of six separate areas that comprise the Port Phillip Heads Marine National Park and is a popular site for divers.[2]

Features

The Portsea Hole is a remnant section of the drowned valley of the Yarra River, descending sharply from the 12 metres (39 ft) depth of the surrounding seabed to 32 metres (105 ft), exposing changes in the strata of the limestone sides with depth. It is characterized by diverse and abundant fish assemblages as well as a rich benthic community of marine invertebrates, encrusting algae, sponges and soft corals.[2]

See also

References

  1. ↑ "Portsea Hole". Parks Victoria. Government of Victoria. 2014. Retrieved 27 August 2014.
  2. 1 2 3 4 5 Port Phillip Heads Marine National Park Management Plan (PDF). Parks Victoria (PDF). Melbourne: Government of Victoria. July 2006. pp. 1, 5. ISBN 0-7311-8349-5. Retrieved 27 August 2014.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.