isostatic

[ahy-suh-stat-ik]
adjective
of, pertaining to, or characterized by isostasy.

Origin:
1885–90; iso- + static

isostatically, adverb
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World English Dictionary
isostasy (aɪˈsɒstəsɪ)
 
n
the state of balance, or equilibrium, which sections of the earth's lithosphere (whether continental or oceanic) are thought ultimately to achieve when the vertical forces upon them remain unchanged. The lithosphere floats upon the semifluid asthenosphere below. If a section of lithosphere is loaded, as by ice, it will slowly subside to a new equilibrium position; if a section of lithosphere is reduced in mass, as by erosion, it will slowly rise to a new equilibrium position
 
[C19: iso- + -stasy, from Greek stasis a standing]
 
isostatic
 
adj

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American Heritage
Science Dictionary
isostasy   (ī-sŏs'tə-sē)  Pronunciation Key 
Equilibrium in the Earth's crust, in which an elevated part in one area is counterbalanced by a depressed part in another. Isostasy exists because the Earth's crust is relatively light compared to the denser mantle over which it lies, and therefore behaves as if it is floating. Areas of the Earth's crust rise or subside to accommodate added load (as from a glacier) or diminished load (as from erosion), so that the forces that elevate landmasses balance the forces that depress them.

isostatic adjective (ī'sō-stāt'ĭk)
The American Heritage® Science Dictionary
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Example sentences
After the eruption, the collapsed caldera continues to subside as the isostatic equilibrium is reached.
The combination of eustatic and isostatic effects at a particular location is known as relative sea level rise.
Summary maps of geology, isostatic gravity, aeromagnetic and ground magnetic data.
The residual signal in the oceans can be explained by isostatic compensation by a cooling lithosphere.
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