A recursive island or lake, also known as a nested island or lake, is an island or a lake that lies within a lake or an island.[1] For the purposes of defining recursion, small continental land masses such as Madagascar and New Zealand count as islands, while large continental land masses do not. Islands found within lakes in these countries are often recursive islands because the lake itself is located on an island.
Recursive islands
Islands in lakes
Idjwi, in the central-southern region of Lake Kivu
Only a few notable examples are given.
Islands in lakes on islands
Samosir is in the middle of Lake Toba.
There are nearly 1,000 islands in lakes on islands in Finland alone.[6]
Islands in lakes on islands in lakes
Islands in lakes on islands in lakes on islands
| Name | In lake | On island | In lake | On island | Country | Area (m2) |
Coordinates | Notes |
|---|---|---|---|---|---|---|---|---|
| — | Not specified | Not specified | Nettilling Lake | Baffin Island | Canada | 40,000 | 66°41′15″N 70°28′48″W / 66.68750°N 70.48000°W | There are more islands in lakes on the 'level 2' island in Nettling Lake. |
| — | — | — | — | Victoria Island | Canada | 16,000 | 69°47′32″N 108°14′26″W / 69.79222°N 108.24056°W | Sometimes unofficially referred to as Inception Island. |
| — | Aek Natonang (Locally Sidihoni Lake[14]) | Samosir | Lake Toba | Sumatra | Indonesia | 13,125 | 2°33′52″N 98°53′0″E / 2.56444°N 98.88333°E | Two islands, the largest of which is 175 m by 75 m. |
| — | — | Glover Island | Grand Lake | Newfoundland | Canada | 7,500 | 48°47′48″N 57°39′28″W / 48.79667°N 57.65778°W | There are several (at least seven) other, even smaller, islets in the lake |
| — | Unnamed | Glover Island | Grand Lake | Newfoundland | Canada | 2,300 | 48°43′8″N 57°46′23″W / 48.71889°N 57.77306°W | In a lake 11 km south west to the lake that contains the larger island. There are no other island in this island's lake |
| — | — | — | Meelpaeg Reservoir | Newfoundland | Canada | 100 | 48°18′44″N 56°30′48″W / 48.31222°N 56.51333°W | There are 3 other smaller islands in the same lake. |
| unnamed island | Arethusa Pool | Mou Waho | Lake Wānaka | South Island | New Zealand | 225 | 44°33′15″S 169°05′3″E / 44.55417°S 169.08417°E | There are two islands in this lake, both less than 25 m across. |
| — | — | Eilean Sùbhainn | Loch Maree | Great Britain | United Kingdom | 225 | 57°41′24″N 5°29′9″W / 57.69000°N 5.48583°W | Two islets, each of which is 15m by 15m |
| — | — | — | Kooryet Lake | Banks Island (British Columbia) | Canada | ~100 | 53°21′7″N 129°59′30″W / 53.35194°N 129.99167°W | A number of small islets, the largest of which is only 10m across |
| — | Samosir | Lake Toba | Sumatra | Indonesia | 400 | 2°38′11″N 98°50′14″E / 2.63639°N 98.83722°E | ||
| — | — | — | Jubilee Lake | Newfoundland | Canada | 20 | 48°3′50″N 55°10′24″W / 48.06389°N 55.17333°W | Several small islets, the largest of which is about 5 m across |
| — | — | Cayo pajaro | Laguna de Leche | Cuba | Cuba | 832 | 22°13′31″N 78°40′2″W / 22.22528°N 78.66722°W | There are several other islets in the lake, all about half the area of the specified islet. |
| — | — | — | Lago Windhond | Isla Navarino | Chile | 30 | 55°06′41.3″S 67°35′33.5″W / 55.111472°S 67.592639°W | Approximately 50 other smaller and similar sized islets are present in the immediate surrounding area. |
Until 2020,[15] Vulcan Point was an island that existed in Main Crater Lake on Volcano Island in Lake Taal on Luzon in the Philippines.[16] Main Crater Lake evaporated during the 2020 Taal Volcano eruption,[15] but the water in Taal Lake has returned and has a new island. Vulcan Point became a peninsula.
Islands in lakes on islands in lakes on islands in lakes
Moose Boulder was claimed to exist in the seasonal pond of Moose Flats on Ryan Island in Siskiwit Lake on Isle Royale in Lake Superior in the United States.[17] In 2020, an expedition to the island found that it is potentially a hoax, along with the aforementioned seasonal pond.[18]
Recursive lakes
Lake Alaotra region, Madagascar
Lakes on islands
Only a few notable examples are listed.
Tourists on Laguna del Volcan Maderas on Ometepe Island in Lake Nicaragua
Lakes on islands in lakes
Lakes on islands in lakes on islands
View across Arethusa Pool (foreground) on Mou Waho Island to Lake Wānaka, New Zealand
Lakes on islands in lakes on islands in lakes
Only one such lake is known.
| Name | On island | In lake | On island | In lake | Country | Size (km2) | Coordinates | Notes |
|---|---|---|---|---|---|---|---|---|
| Unnamed | Not Specified | Not Specified | Not Specified | Lake Yathkyed | Canada | 0.013 | 62°39′5.8″N 97°47′11.8″W / 62.651611°N 97.786611°W | There is, even further, an island in that lake, making it the only such island in the world that has been discovered so far. |
See also
Notes
References
- 1 2 3 Records, Guinness World (August 28, 2018). 2019 Guinness World Records. pp. 40–41. ISBN 978-1-912286-43-0.
- ↑ January 2012, Natalie Wolchover 24 (January 24, 2012). "World's Largest Island-in-a-lake-on-an-island-in-a-lake-on-an-island Seen on Google Earth". livescience.com.
{{cite web}}: CS1 maint: numeric names: authors list (link) - ↑ Québec (ministère de l’Environnement) (April 2003), "La réserve de biodiversité projetée de l'île René-Levasseur" (PDF), Bureau d'audiences publiques sur l'environnement (in French), Quebec City, p. 14, retrieved August 19, 2010
- ↑ "2019 U.S. Gazetteer Files". United States Census Bureau. Retrieved August 7, 2020.
- ↑ "Crater Lake, Oregon". NASA Earth Observatory. September 18, 2006.
- ↑ "Suomen saaristo- ja vesistömatkailusta" (PDF). valtioneuvosto.fi / Julkaisut.
- ↑ "Samosir Island - Everything you Need to Know about Samosir Island".
- ↑ "Volcano Island | volcano, Philippines". Encyclopedia Britannica.
- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Shoreline - lakes (Ranta10), 2020. Finnish Environment Centre, ELY centres. Released under CC-BY-4.0.
- ↑ "Lac Du Chaunoy, Quebec Map". geodata.us.
- ↑ "GNIS Detail - Ryan Island". geonames.usgs.gov.
- ↑ "Islands within Chambers Island's Lake Mackaysee Now Protected by Door County Land Trust". November 8, 2018.
- ↑ "Island in a Lake on an Island in a Lake on an Island". earthobservatory.nasa.gov. February 22, 2015. Retrieved March 13, 2020.
- ↑ "Aek Natonang Lake – A Sub-Lake of Pangururan". www.toba.indonesia-tourism.com. Retrieved August 12, 2020.
- 1 2 Freedman, Andrew; Meko, Tim; Karklis, Laris (January 17, 2020). "Taal volcano's crater lake is nearly empty". Washington Post.
- ↑ "Some interesting islands and lakes". Topografisch Verbond Elbruz. Archived from the original on September 19, 2013. Retrieved February 1, 2014.
- ↑ "Largest island on the largest lake in the world". Albert Lea Tribune. July 21, 2009. Retrieved March 13, 2020.
- ↑ Taub, Matthew (March 10, 2020). "The Intrepid Mother and Son Who Unraveled a Geographic Hoax". Atlas Obscura.
- ↑ "Shara-Nur lake". BaikalNature Tour Operator. May 11, 1975. Retrieved March 13, 2020.
- ↑ "GNIS Detail - Lake Desor". geonames.usgs.gov.
- ↑ "GNIS Detail - Lake Richie". geonames.usgs.gov.
- ↑ Valenzuela, Orlando. "Puerta laguna misteriosa [Door to mysterious lagoon]". El Nuevo Diario (in Spanish).
- ↑ "Global Volcanism Program | Zapatera". Smithsonian Institution | Global Volcanism Program.
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