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Underwater eruptions cause tsunamis and cause lava to form and underwater ridge.
Iceland
Underwater mountains that run through an ocean form a mid ocean ridge. They are found all over the ocean, the largest being the Mid Atlantic Ridge.
No, but some mid-ocean ridges once were rift valleys.
Rift volcanism.
ground water
The French word for a ridge of sediment, gravel, silt, and other materials is "alluvion."
"un sillon" is probably what you are looking for. It is the term used for Japanese gardens of sand or gravel, or in agriculture for tilled fields.
The mid Atlantic ridge is an underwater mountain chain.
Underwater eruptions cause tsunamis and cause lava to form and underwater ridge.
The mid-ocean ridge are mountains that were formed underwater.
mid-ocean ridge
ocean ridge
Underwater mountian ranges/ underwater volcanoes
Mid ocean ridge
it is a REEF
a sandbar is a ridge of sand,gravel, or broken shells that is found in open water. :)