The atolls have formed over the longitudinally running Laccadive-Chagos submarine ridge
and are spread over 90,000 square kilometers with a land area of just 1% in a 300 square kilometer space and a maximum elevation of just over 2 meters above the mean sea level.
In Chile is found in the Salas y Gomez submarine ridge
(Parin et al., 1997; Eschmeyer 2015).
That sensitivity is a result of a submarine ridge
beneath the ice shelf that was only discovered in 2009 when an Autonomous Underwater Vehicle mapped the seabed beneath the ice.
Scientists recently measured for the first time the turbulence at the Samoan Passage--a 25-mile opening in a giant submarine ridge
in the South Pacific where 6 million cubic meters of water force their way northward every second.
Earlier this summer, researchers reported that sonar and video surveys of a submarine ridge
in Lake Huron revealed structures similar to those used to guide caribou by modern-day hunters in the high Arctic (SN: 7/4/09, p.
(84) However, if the seafloor high is a submarine ridge
A new hemerocoetinefish, Osopsaron karlik (Percophidae, Trachinoidei) from the Nazca submarine ridge
Geographical distribution: this species is abundant in the Nazca submarine ridge
, especially east of 84[degrees]W, off Peru (Prosvirov, 1990; Rudjakov et al., 1990; Parin et al., 1997) where it has been commercially fished by industrial vessels (Parin et al., 1997; Arana & Venturini, 1991).
Catherine Stickley of the University of Tromso in Norway and colleagues examined sediments drilled from a site on a submarine ridge
about 250 kilometers from the North Pole.
The researchers used side-scan sonar and video-equipped, remotely operated vehicles to survey two patches of lake bottom that together cover about 72 square kilometers of the submarine ridge
. In one of those areas, sonar data reveal a sinuous line of small boulders 350 meters long that seem to have been arranged to visually accentuate a low ridge.
that are not natural components of the continental margin are subject to a 350 nm cut-off; if they are a natural component, the continental shelf can extend beyond 350 nm, but shall not exceed 100 nm from the 2500 m isobath.
Those in Belize, for example, lie on non-volcanic submarine ridges