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The Louisville Ridge, also known as the Louisville Seamount Chain,[1] is an underwater chain of over 70 seamounts in the Southwest Pacific Ocean. As one of the longest seamount chains on Earth it stretches some 4,300 km (2,700 mi)[2] from the Pacific-Antarctic Ridge northwest to the Tonga-Kermadec Trench, where it subducts under the Indo-Australian Plate as part of the Pacific Plate. The movement of the Pacific Plate over the Louisville hotspot formed the chain.

Louisville Ridge
Louisville seamount chain - bathymetry.jpg
The Louisville Ridge stretches diagonally across this bathymetric map of the southwest Pacific Ocean.
Summit arealength:4,300 km (2,700 mi)
LocationSouthwest Pacific Ocean
TypeSeamount chain
Volcanic arc/chainHotspot volcanoes
Discovery date1972

Depth-sounding data first revealed the existence of the seamount chain in 1972.[3]


See alsoEdit


  1. ^ "Marine Gazetteer Placedetails". Retrieved 2017-02-20.
  2. ^ Vanderkluysen, L.; Mahoney, J. J.; Koppers, A. A.; and Lonsdale, P. F. (2007). Geochemical Evolution of the Louisville Seamount Chain, American Geophysical Union, Fall Meeting 2007, abstract #V42B-06.
  3. ^ Sandwell, David T.; Walter H.F. Smith (1997). "Exploring the ocean basins with satellite altimeter data". Satellite Geodesy. La Jolla: Scripps Institution of Oceanography. Retrieved 2010-01-19. The Louisville Ridge was first detected in 1972 using depth soundings collected along random ship crossings of the South Pacific. Six years later the full extent of this chain was revealed by a radar altimeter aboard the Seasat (NASA) spacecraft.

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