Lansdowne Bank: Difference between revisions
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{{Short description|Submerged bank near New Caledonia}} |
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[[File:Karta NC Iles Chesterfield.PNG|thumb|right|250px|Lansdowne Bank, centre of map]] |
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'''Lansdowne Bank''', sometimes called '''Landsdowne Bank''', is an extensive |
'''Lansdowne Bank''', sometimes called '''Landsdowne Bank''', is an extensive [[submerged bank]] located between the main island of [[New Caledonia]] and the [[Chesterfield Islands]], in the easternmost part of the [[Coral Sea]]. It covers an area of {{convert|4,300|km2|0|abbr=on}},<ref>[http://docplayer.fr/65661420-Le-parc-naturel-de-la-mer-de-corail.html Le parc naturel de la mer de Corail], p. 26</ref> making it one of the largest banks of the world, has general depths of {{convert|60|to(-)|80|m|0|abbr=out}}, and a largely sandy bottom. Two reefs mark the shallowest spots of the bank, but they are still submerged at low tide. |
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'''Fairway Ridge''', |
'''Fairway Ridge''', also called '''Fairway Plateau''', is a submarine feature shown on some maps in that area. The Lansdowne Bank area marked is far larger than Fairway Plateau, but there are smaller, unnamed plateaus nearby. The Lansdowne Bank area, shown at the northeastern end of [[Lord Howe Rise]], is separated from New Caledonia by New Caledonia Basin and Fairway Basin. |
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== Nereus Reef == |
== Nereus Reef == |
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Nereus Reef is at the northern end of Lansdowne Bank. Its given position of {{coord|20|07|S|160|28|E|name=Nereus Reef}} is doubtful.<ref name="Directions">{{cite book |
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| title =Publication 127: Sailing Directions (Enroute): East Coast of Australia and New Zealand |
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| publisher =National Geospatial Intelligence Agency (NGA) |
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| volume = |
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| edition =8 |
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| year =2004 |
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| location =Bethesda, Maryland |
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| page =135 |
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}}</ref> Nereus Reef has the least depth of the bank, with {{convert|3.7|m|ft}}. A shoal with a depth of {{convert|16|m|ft}} is {{convert|14|mi|km|0}} west-northwest of Nereus Reef. |
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== Fairway Reef == |
== Fairway Reef == |
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The southeastern end of Lansdowne Bank is marked by |
The southeastern end of Lansdowne Bank is marked by Fairway Reef, thus named from its lying in the [[Channel (geography)|fairway]] between [[Australia]] and [[New Caledonia]], midway between the [[Bellona Reefs]] (south of the Chesterfield Islands) and New Caledonia. Fairway Reef is {{convert|3.2|km|mi}} long, about 4 to 5 [[fathom]]s (7.3 to 9.1 metres) deep, of [[coral]] bottom, and located at {{coord|21|00|15|S|161|45|09|E|name=Fairway Reef}}. According to some sources, Fairway Reef dries at low tide.<ref name="reefbase">{{cite web |
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| authorlink = |
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| title =Reefbase: A Global Information System for Coral Reefs |
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| publisher =WorldFish |
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| date =April 2013 |
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| url =http://www.reefbase.org/global_database/default.aspx?section=r1®ion=22&country=NCL |
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| access-date = 2013-04-19 |
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}}</ref> |
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== Sandy Island Mystery == |
== Sandy Island Mystery == |
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[[Google Maps]] and other internet maps showed a large landmass named [[Sandy Island (New Caledonia)|Sandy Island]] in northern Lansdowne Bank, but did not show an image for it. The non-existence of this [[phantom island]] had been proved by French missions in the 1970s, and the information passed to hydrographic services around the world, but it had remained in the World Vector Shoreline Database. In 2012 Australian scientists again proved the island does not exist.<ref name="bbc">{{cite web | title = South Pacific Sandy Island 'proven not to exist' | url = https://www.bbc.co.uk/news/world-asia-20442487 | work=BBC News | date = 22 November 2012 | access-date = 22 November 2012}}</ref><ref name="guardian">{{cite web |url=https://www.theguardian.com/world/2012/nov/22/sandy-island-missing-google-earth |title=The Pacific island that never was |work=The Guardian |date=22 November 2012 |access-date=22 November 2012}}</ref> |
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Google Maps and other internt maps showed a large island defined and marked in the area of the north of Landsdown Bank, but do not show an image for it. This island was marked as [[Sandy_Island_(New_Caledonia)|Sandy Island]]. The area marked may be the same area as the Nereus Reef or Nereus Shoal is meant to exist in. |
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==See also== |
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* [[List of reefs]] |
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{{coord|20|35|S|160|30|E|region:NC_type:mountain_scale:1000000|display=title}} |
{{coord|20|35|S|160|30|E|region:NC_type:mountain_scale:1000000|display=title}} |
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==References== |
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{{reflist}} |
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== External links == |
== External links == |
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* [https://web.archive.org/web/20101223043232/http://www.oceandots.com/pacific/coralsea/fairway.php Geology] |
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* [http://www.zoneco.nc/IMG/pdf/brodien_2003_geologie_systemes_rides_et_bassins_partie_sud_ouest_zee_nc_style_structural_et_poten.pdf Geology] |
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* [http://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_5/b_fdi_06-07/08780.pdf Geology] |
* [http://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_5/b_fdi_06-07/08780.pdf Geology] |
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* |
*{{webarchive |url=https://web.archive.org/web/20101223043232/http://www.oceandots.com/pacific/coralsea/fairway.php |date=December 23, 2010 |title=Fairway Reef }} |
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* [https://web.archive.org/web/20130305015208/http://www.shom.fr/fileadmin/data-www/01-LE_SHOM/02-ACTUALITES/01-LES_COMMUNIQUES/fig_2_-_Sandy_Island.png Part of Nautical Chart n° 6670] |
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[[Category:Landforms of New Caledonia]] |
[[Category:Landforms of New Caledonia]] |
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[[Category:Coral reefs]] |
[[Category:Coral reefs]] |
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[[Category:Undersea banks]] |
[[Category:Undersea banks of the Pacific Ocean]] |
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Latest revision as of 18:13, 4 December 2023
Lansdowne Bank, sometimes called Landsdowne Bank, is an extensive submerged bank located between the main island of New Caledonia and the Chesterfield Islands, in the easternmost part of the Coral Sea. It covers an area of 4,300 km2 (1,660 sq mi),[1] making it one of the largest banks of the world, has general depths of 60 to 80 metres (197–262 ft), and a largely sandy bottom. Two reefs mark the shallowest spots of the bank, but they are still submerged at low tide.
Fairway Ridge, also called Fairway Plateau, is a submarine feature shown on some maps in that area. The Lansdowne Bank area marked is far larger than Fairway Plateau, but there are smaller, unnamed plateaus nearby. The Lansdowne Bank area, shown at the northeastern end of Lord Howe Rise, is separated from New Caledonia by New Caledonia Basin and Fairway Basin.
Nereus Reef
[edit]Nereus Reef is at the northern end of Lansdowne Bank. Its given position of 20°07′S 160°28′E / 20.117°S 160.467°E is doubtful.[2] Nereus Reef has the least depth of the bank, with 3.7 metres (12 ft). A shoal with a depth of 16 metres (52 ft) is 14 miles (23 km) west-northwest of Nereus Reef.
Fairway Reef
[edit]The southeastern end of Lansdowne Bank is marked by Fairway Reef, thus named from its lying in the fairway between Australien and Neukaledonien, midway between the Bellona Reefs (south of the Chesterfield Islands) and New Caledonia. Fairway Reef is 3.2 kilometres (2.0 mi) long, about 4 to 5 fathoms (7.3 to 9.1 metres) deep, of coral bottom, and located at 21°00′15″S 161°45′09″E / 21.00417°S 161.75250°E. According to some sources, Fairway Reef dries at low tide.[3]
Sandy Island Mystery
[edit]Google Maps and other internet maps showed a large landmass named Sandy Island in northern Lansdowne Bank, but did not show an image for it. The non-existence of this phantom island had been proved by French missions in the 1970s, and the information passed to hydrographic services around the world, but it had remained in the World Vector Shoreline Database. In 2012 Australian scientists again proved the island does not exist.[4][5]
See also
[edit]20°35′S 160°30′E / 20.583°S 160.500°E
References
[edit]- ^ Le parc naturel de la mer de Corail, p. 26
- ^ Publication 127: Sailing Directions (Enroute): East Coast of Australia and New Zealand (PDF) (8 ed.). Bethesda, Maryland: National Geospatial Intelligence Agency (NGA). 2004. p. 135.
- ^ "Reefbase: A Global Information System for Coral Reefs". WorldFish. April 2013. Retrieved 2013-04-19.
- ^ "South Pacific Sandy Island 'proven not to exist'". BBC News. 22 November 2012. Retrieved 22 November 2012.
- ^ "The Pacific island that never was". The Guardian. 22 November 2012. Retrieved 22 November 2012.
External links
[edit]- Geology
- Geology
- Fairway Reef at the Wayback Machine (archived December 23, 2010)
- Part of Nautical Chart n° 6670
