Our Beautiful World
Submarine volcanoes do not have the same interest to media as volcanoes on land.
One reason is because there normally are not any large cities beneath such a volcano....
(at least, not to our knowledge), and therefore no threat to humans.
That they are not dangerous because they are under the sea-level is not true.
After having learned about "Kick 'em Jenny", we am sure you agree.
is the first time that glowing lava has ever been witnessed from
The volcanoes of Tonga.
Submarine volcanoes are found along the most fissures
between the techtonic plates. Many of those
The most important volcanic activity, is in fact the
one going on down below in the oceans.
This ridge makes an undersea mountainridge from 1.000
to 2.000 km width, and 1.000 to 3.000 meter above
From time to time fissures opens up within the valley,
some kilometer long and some few meters wide.
Some openings are on relatively shallow water, and
gas and pumice
In deep waters, more than 2000 m, the pressure is
often so high that in stops the effusion of gas and vapour,
On the Loihi mountain range south of Big Island, Hawaii,
a new volcano was recently discovered.
See also Marsili-volcano which recently showed up in the Mediterraneas Sea.
Deep-sea hydrothermal vents
Since the first discovery of deep-sea hydrothermal vents along the Gala´pagos Rift in 1977, numerous vent sites and endemic
faunal assemblages have been found along mid-ocean ridges and back-arc basins at low to mid latitudes. These discoveries
have suggested the existence of separate biogeographic provinces in the Atlantic and the North West Pacific, the existence
of a province including the South West Pacific and Indian Ocean, and a separation of the North East Pacific, North East
Pacific Rise, and South East Pacific Rise. The Southern Ocean is known to be a region of high deep-sea species diversity and
centre of origin for the global deep-sea fauna. It has also been proposed as a gateway connecting hydrothermal vents in
different oceans but is little explored because of extreme conditions.
We will try to follow up those new discoveries.
The last one is from the Scotia-sea area. Click here to follow up.
|Submarine Volcanoes, Ridges, and Vents, from USGS|