High island

In geology (and sometimes in archaeology), a high island or volcanic island is an island of volcanic origin. The term can be used to distinguish such islands from low islands, which are formed from sedimentation or the uplifting of coral reefs[1] (which have often formed on sunken volcanos).

Moorea ISS006
Moorea, a high island of volcanic origin where the central island is still prominent.
Stromboli is one of the eight Aeolian Islands, a volcanic arc north of Sicily.

Definition and origin

There are a number of "high islands" which rise no more than a few feet above sea level, often classified as "islets or rocks", while some "low islands", such as Makatea, Nauru, Niue, Henderson and Banaba, as uplifted coral islands, rise several hundred feet above sea level.

The two types of islands are often found in proximity to each other, especially among the islands of the South Pacific Ocean, where low islands are found on the fringing reefs that surround most high islands. Volcanic islands normally arise above a so-called hotspot.

Habitability for humans

The differences in geology and topography between high and low islands mean a lot in terms of habitability for humans: high islands above a certain size usually have fresh groundwater, while low islands often do not. This hampers human settlement on many low islands.

See also

  • Archipelagic apron – A fan-shaped gently sloping region of sea floor found around oceanic islands
  • Atoll – Ring-shaped coral reef, generally formed over a subsiding oceanic volcano, with a central lagoon and perhaps islands around the rim
  • Galápagos Islands – Achipelago and protected area of Ecuador in the Pacific Ocean
  • Krakatoa Archipelago
  • Low island
  • Volcanic arc – A chain of volcanoes formed above a subducting plate


  1. ^ Murphy, Raymond E. (July 1949). ""High" and "Low" Islands in the Eastern Carolines". Geographical Review. American Geographical Society. 39 (3): 425–439. doi:10.2307/210643. JSTOR 210643.

External links


Ardoileán or Ard Oileán, known in English as High Island (a translation of the Irish name), is a small island off the northwest coast of Connemara in County Galway, Ireland. It was once the site of an early Irish monastic community.

Dean Corll

Dean Arnold Corll (December 24, 1939 – August 8, 1973) was an American serial killer who abducted, raped, tortured, and murdered at least 28 teenage boys and young men between 1970 and 1973 in Houston, Texas. Corll was aided by two teenaged accomplices, David Owen Brooks and Elmer Wayne Henley. The crimes, which became known as the Houston Mass Murders, came to light after Henley fatally shot Corll. Upon discovery, they were considered the worst example of serial murder in U.S. history.Corll's victims were typically lured with an offer of a party or a lift to a succession of addresses in which he resided between 1970 and 1973. They would then be restrained either by force or deception, and each was killed either by strangulation or shooting with a .22-caliber pistol. Corll and his accomplices buried 17 of their victims in a rented boat shed; four other victims were buried in woodland near Lake Sam Rayburn; one victim was buried on a beach in Jefferson County; and at least six victims were buried on a beach on the Bolivar Peninsula. Brooks and Henley confessed to assisting Corll in several abductions and murders; both were sentenced to life imprisonment at their subsequent trials.

Corll was also known as the Candy Man and the Pied Piper, because he and his family had owned and operated a candy factory in Houston Heights, and he had been known to give free candy to local children.

Frankland Group National Park

Frankland Group is a national park in Queensland, Australia, 1353 km northwest of Brisbane. The five continental islands of the Frankland Group are High Island, Normanby Island, Mabel Island, Round Island and Russell Island, which lie about 10 km offshore, and are about 45 km south east of Cairns. They are the traditional home of the Mandingalbay Yidinji, and the Gungandji Aboriginal peoples. On 9 June 1770, on the First voyage of James Cook, Cook named the island group after Admiral Sir Thomas Frankland, 5th Baronet (1718 – 1784).

Gambier Islands

The Gambier Islands (French: Îles Gambier or Archipel des Gambier) are an archipelago in French Polynesia, located at the southeast terminus of the Tuamotu archipelago. They cover an area of 30 km2 or 12 sq mi, and are the remnants of a caldera along with islets on the surrounding fringing reef, They are generally considered a separate island group from Tuamotu both because their culture and language (Mangarevan) are much more closely related to those of the Marquesas Islands, and because, while the Tuamotus comprise several chains of coral atolls, the Gambiers are of volcanic origin with central high islands. The population of the archipelago is 1319 people.

High Island, Hong Kong

High Island or Leung Shuen Wan (Chinese: 糧船灣; Jyutping: loeng4 syun4 waan1; literally: 'grain ship bay') is a former island in the southeast of Sai Kung Peninsula, Hong Kong. The island was connected to the peninsula by two dams that enclosed the Kwun Mun Channel (官門海峽), thereby forming the High Island Reservoir. The dams were constructed between 1969 and 1979. The area is part of the Sai Kung East Country Park. It is now a designated fish culture zone and features several seafood restaurants along the shore.

High Island, Texas

High Island is an Unincorporated community located in the Bolivar Peninsula census-designated place, Galveston County, Texas, United States. The community is located in the extreme eastern part of the county on Bolivar Peninsula, less than one mile from Chambers County and less than two miles from Jefferson County. As of 2000, 500 people resided in High Island. The 2010 census did not record a population for High Island.

The Houston Audubon Society operates four bird sanctuaries in the area, and the community is a nationally famous destination for birdwatchers particularly from April 1 to May 15. Sea Rim State Park is in nearby Jefferson County, but it is inaccessible by State Highway 87, which has been closed since 1990.

High Island (Bronx)

High Island is a small private island, part of the Pelham Islands in the Bronx, New York City. It lies east of the north end of City Island between City Island Harbor and Pelham Bay in Long Island Sound. It is connected to City Island by a sandbar that emerges at very low tide, as well as by a small private bridge.

High Island (Connecticut)

One of the Thimble Islands, High Island once served as a hideout for famed pirate Captain Kidd. Kidd's Harbor on the island, as well as nearby Kidd's Island, were named for him. Money Island was named for the legend that he allegedly buried a portion of his treasure here.

High Island (Michigan)

High Island is an island in Lake Michigan and is part of the Beaver Island archipelago. It is 3,495 acres (14.14 km2) in size. The island is owned by the U.S. state of Michigan and is managed by the Michigan Department of Natural Resources as part of the Beaver Islands State Wildlife Research Area.

High Island got its name from a large, perched sand dune on the western side of the island. The sand, blown by the lake's prevailing winds, has piled up into a sand dune elevated 780 feet (238 m) above sea level, or 199 feet (61 m) above the level of Lake Michigan.

The island is currently uninhabited. It lies approximately four miles (6 km) west of the much larger Beaver Island, and less than two miles from Trout Island.

High Island Independent School District

High Island Independent School District is a public school district based in unincorporated Galveston County, Texas, United States.

HIISD serves the communities of Caplen, High Island, and Gilchrist on the Bolivar Peninsula. The school district lost approximately 15% of its students in 2008 due homes and residences destroyed by Hurricane Ike. In the fall of 2009 the district reported an enrollment of 186 students.

High Island Reservoir

The High Island Reservoir (Chinese: 萬宜水庫; pinyin: Wànyí shuǐkù; Jyutping: maan6 ji4 seoi2 fu3), located in the far south eastern part of the Sai Kung Peninsula, was opened in 1978 helping to alleviate water shortage problems in Hong Kong. Its water capacity is approximately 273 million cubic metres. The area it occupies was originally the Kwun Mun Channel (官門海峽), which separated High Island from the Sai Kung Peninsula.


Hoy (from Norse Háey meaning "high island") is an island in Orkney, Scotland, measuring 143 square kilometres (55 sq mi) — ranked largest in the archipelago after Mainland. A natural causeway, the Ayre, links to much smaller South Walls; the two islands are treated as one entity by the UK census.

Hurricane Harvey

Hurricane Harvey was a Category 4 hurricane that made landfall on Texas and Louisiana in August 2017, causing catastrophic flooding and many deaths. It is tied with 2005's Hurricane Katrina as the costliest tropical cyclone on record, inflicting $125 billion (2017 USD) in damage, primarily from catastrophic rainfall-triggered flooding in the Houston metropolitan area and Southeast Texas. It was the first major hurricane to make landfall in the United States since Wilma in 2005, ending a record 12-year span in which no hurricanes made landfall at the intensity of a major hurricane throughout the country. In a four-day period, many areas received more than 40 inches (1,000 mm) of rain as the system slowly meandered over eastern Texas and adjacent waters, causing unprecedented flooding. With peak accumulations of 60.58 in (1,539 mm), in Nederland, Texas, Harvey was the wettest tropical cyclone on record in the United States. The resulting floods inundated hundreds of thousands of homes, which displaced more than 30,000 people and prompted more than 17,000 rescues.

The eighth named storm, third hurricane, and first major hurricane of the extremely active 2017 Atlantic hurricane season, Harvey developed from a tropical wave to the east of the Lesser Antilles, reaching tropical storm status on August 17. The storm crossed through the Windward Islands on the following day, making landfall on the southern end of Barbados and a second landfall on Saint Vincent. Upon entering the Caribbean Sea, Harvey began to weaken due to moderate wind shear, and degenerated into a tropical wave north of Colombia, late on August 19. The remnants were monitored for regeneration as it continued west-northwestward across the Caribbean and the Yucatán Peninsula, before redeveloping over the Bay of Campeche on August 23. Harvey then began to rapidly intensify on August 24, regaining tropical storm status and becoming a hurricane later that day.While the storm moved generally northwest, Harvey's intensification phase stalled slightly overnight from August 24–25; however, Harvey soon resumed strengthening and quickly became a major hurricane and attained Category 4 intensity later that day. Hours later, Harvey made landfall at San José Island, Texas, at peak intensity, followed by another landfall at Holiday Beach at Category 3 intensity. Rapid weakening then ensued, and Harvey had downgraded to a tropical storm as it stalled near the coastline, dropping torrential and unprecedented amounts of rainfall over Texas. On August 28, it emerged back over the Gulf of Mexico, strengthening slightly before making a fifth and final landfall in Louisiana on August 29. As Harvey drifted inland, it quickly weakened again as it became extratropical on September 1, before dissipating two days later.In addition to the huge cost and extent of the damage it caused, Harvey caused at least 107 confirmed deaths: 1 in Guyana and 106 in the United States, the first one in Rockport, Texas. Due to the extensive damage, the name "Harvey" was retired in April 2018 and will not be used for another Atlantic tropical cyclone.

List of reservoirs of Hong Kong

Reservoirs in Hong Kong are spread fairly evenly over the entire 1,104 km² of Hong Kong. There is plenty of space for small reservoirs in Hong Kong, as the hilly areas provide valleys suitable for water storage. However, the larger reservoirs, i.e. High Island Reservoir and Plover Cove Reservoir, were built differently. Dams were built where the reservoir's edge was proposed to be, sea water was drained out and replaced with fresh water.


Mo'orea (English: or ; Tahitian: /moʔore(ʔ)a/), also spelled Moorea, is a high island in French Polynesia, one of the Windward Islands, part of the Society Islands, 17 kilometres (11 mi) northwest of Tahiti. The name comes from the Tahitian Mo'ore'a, meaning "yellow lizard": Mo'o = lizard ; Re'a (from re'are'a) = yellow. An older name for the island is 'Aimeho, sometimes spelled 'Aimeo or 'Eimeo (among other spellings given by early visitors before Tahitian spelling was standardized). Early Western colonists and voyagers also referred to Mo'orea as York Island.

Sai Kung District

Sai Kung District (Chinese: 西貢區; Cantonese Yale: Sāigung Kēui) is the fifth largest district in Hong Kong in terms of area. It comprises the southern half of Sai Kung Peninsula and Clear Water Bay Peninsula in the New Territories plus a strip to the east of Kowloon. It is made up of the Sai Kung Town, Sai Kung rural areas, Tseung Kwan O New Town and over 70 islands of different sizes. The administrative centre is Sai Kung Town but the district's population is concentrated in Tseung Kwan O. The district has the second youngest residents. Known as the "back garden of Hong Kong", Sai Kung has been able to retain its natural scenery, and where the Hong Kong Global Geopark is located. Behind the modern buildings, a lot of traditional customs and cultures are still retained in the rural villages.

Sai Kung East Country Park

Sai Kung East Country Park (Chinese: 西貢東郊野公園) is a 44.77 square kilometres (17.29 sq mi) country park on the Sai Kung Peninsula in Hong Kong. It opened in 1978 and has features including:

High Island Reservoir

High Island

Pak Tam Au

Sheung Yiu

Wong Shek Pier

Beaches of Tai Long Wan: Sai Wan, Ham Tin Wan, Tai Wan and Tung Wan.

Sharp Peak

Po Pin Chau

Conic Island (飯甑洲, Fan Tsang Chau)

Long Ke Wan

Luk Wu

Long Harbour

Chek Keng

Sibley County, Minnesota

Sibley County is a county in the U.S. state of Minnesota. As of the 2010 United States Census, the population was 15,226. Its county seat is Gaylord. Sibley County is part of the Minneapolis-St. Paul-Bloomington, MN-WI Metropolitan Statistical Area.

Utupua Island

Utupua Island is an island in the Santa Cruz Islands, located 66 km to the Southeast of the main Santa Cruz group, between Vanikoro and Santa Cruz proper (Nendo Island). This island belongs administratively to the Temotu Province of the Solomon Islands.

Utupua is a high island surrounded by a coral reef. Its land surface is 69.0 square kilometres (26.6 square miles) and its highest point 380 metres (1,247 feet).

Utupua has a population of 848 inhabitants (1999 census) scattered in small villages. The main villages in the island are: Avita, Malombo, Tanimbili, Apakho and Nembao.


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