Nepean Island is a small uninhabited island

Island

An island or isle is any piece of sub-continental land that is surrounded by water. Very small islands such as emergent land features on atolls can be called islets, cays or keys. An island in a river or lake may be called an eyot , or holm...

 located at
29°04′S 167°57′E, about 1 km south off a golf course on Norfolk Island

Norfolk Island

Norfolk Island is a small island in the Pacific Ocean located between Australia, New Zealand and New Caledonia. The island is part of the Commonwealth of Australia, but it enjoys a large degree of self-governance...

 in the Southwest Pacific. It was named in 1788 by Lieutenant Philip Gidley King

Philip Gidley King

Captain Philip Gidley King RN was a British naval officer and colonial administrator. He is best known as the official founder of the first European settlement on Norfolk Island and as the third Governor of New South Wales.-Early years and establishment of Norfolk Island settlement:King was born...

 for Evan Nepean

Evan Nepean

Sir Evan Nepean, 1st Baronet PC was a British politician and colonial administrator.-Early career:...

, Under Secretary of the Home Department of the United Kingdom

United Kingdom

The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

. It is part of the Australia

Australia

Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

n territory of Norfolk Island and is included in the Norfolk Island National Park

Norfolk Island National Park

Norfolk Island National Park is a protected area of 6.50 km² established in 1984 and managed by the Commonwealth of Australia. It comprises two sections, the Mount Pitt section on Norfolk Island in the South Pacific Ocean with an area of 4.60 km² and the neighbouring 1.90 km² Phillip Island, as...

, as is nearby Phillip Island

Phillip Island (Norfolk Island)

Phillip Island is an uninhabited island located south of Norfolk Island in the Southwest Pacific, and part of the Norfolk Island group. It was named in 1788 by Lieutenant Philip Gidley King for Arthur Phillip, the first Governor of New South Wales. It is part of the Australian territory of Norfolk...

, and about 10 per cent of Norfolk Island proper. The island is made of calcareous

Calcareous

Calcareous is an adjective meaning mostly or partly composed of calcium carbonate, in other words, containing lime or being chalky. The term is used in a wide variety of scientific disciplines.-In zoology:...

 rock dating from the late Pleistocene

Pleistocene

The Pleistocene is the epoch from 2,588,000 to 11,700 years BP that spans the world's recent period of repeated glaciations. The name pleistocene is derived from the Greek and ....

 and is a breeding site for several species of seabird

Seabird

Seabirds are birds that have adapted to life within the marine environment. While seabirds vary greatly in lifestyle, behaviour and physiology, they often exhibit striking convergent evolution, as the same environmental problems and feeding niches have resulted in similar adaptations...

s.