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Relation between buoyancy, isostatic equilibrium, and epeirogenic processes</u></h2>
Buoyant force or buoyancy, is the force exerted in an object which is fully or partially occupied in a fluid. Isostatic equilibrium is the gravitational equilibrium between earth's crust and underlying mantle. while epeirogenic process is the depression of land having long wavelengths.
Both epeirogenic process and isostatic equilibrium uses the principle of buoyancy. The crust of the Earth or the lithosphere floats over underlying mantle at an elevation depending upon its density and thickness.
I think that it was a siege
Answer:
Volcanic islands are formed as a crustal tectonic plate containing an ocean moves over a magma hot spot.
... This magma carries an enormous amount of heat, and it can then be released into the crust and createmagma chambers there.