subduction -- n. A geologic process in which one edge of one crustal plate is forced below the edge of another; subduct- v.; subduction zone- n. A long narrow area in which subduction is taking place, e.g.
subduction zone A narrow, elongate region in which one lithospheric plate descends relative to another.
sublimation The process by which matter in the solid state passes directly to the gaseous state without first becoming liquid.
Subduction (Tectonic) Process of plate tectonics where one lithospheric plate is pushed below another into the asthenosphere. Subduction Zone Linear area where tectonic subduction takes place.
One plate is driven downward (subduction) beneath the other into the mantle, gradually melting as it gets deeper.
The Pacific Ocean is the only ocean which is almost totally bounded by subduction zones. Only the boundary with the Antarctic plate is not a subduction zone.
[edit] Landmasses
The Pacific is ringed by many volcanoes and oceanic trenches ...
These islands arise from volcanoes where the subduction of one plate under another is occurring. Examples include the Marianas Islands, the Aleutian Islands, and most of Tonga in the Pacific Ocean.
Subduction Zone:
An area at a convergent plate boundary where an oceanic plate is being forced down into the mantle beneath another plate. These can be identified by a zone of progressively deeper earthquakes.
Sublimation: ...
 See also: Plate, Surface, Region, Tectonic, Area
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