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Isopoda
island arc a chain of islands bordered on one side by a deep-sea trench. Usually it
fringes a continent, is convex towards ocean and trench, with a marginal basin
on the concave side. Island arcs are commonly volcanic in origin and often
include lines of active volcanoes that then are denoted as volcanic arcs. In
plate tectonics contexts, island arcs occur at the margin of an overriding oceanic plate and are surface manifestations of the subduction process. Island arcs
are classified as active or inactive when the subduction process is active or
has ended, respectively. Active island arcs are sites of severe earthquake
activity. The Aleutians, the Kurils, and the Marianas are typical examples.
~volcanic arc.
island chain ~hot spot.
iso- prefix, which means equal; in mapping, a curve along which, or a surface
upon which, a selected parameter is invariant.
isobar line drawn on a map through places having the same atmospheric pressure at a given time.
isobaric with the same atmospheric pressure.
isobath line drawn on a map through places having the same depth with respect
to the mean sea level (or a reference level approximating the sea level).
isohaline line drawn on a map through places having the same salinity.
isometric growth ~growth.
Isopoda (isopods) order of the class Malacostraca (subphylum Crustacea, phylum
Arthropoda). These crustaceans have a body of 19 segments. In contrast to the
Isopoda. (Barnes 1987)