Isostasy meaning

ī-sŏs'tə-sē
Equilibrium in the earth's crust such that the forces tending to elevate landmasses balance the forces tending to depress landmasses.
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A condition in which there is equal pressure on every side.
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Approximate equilibrium in large, equal areas of the earth's crust, preserved by the action of gravity upon the different substances in the crust in proportion to their densities.
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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.
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(geology) The state of balance or pressure equilibrium thought to exist within the Earth's crust, whereby the upper lithosphere floats on denser magma beneath.
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Origin of isostasy

  • iso– Greek stasis a standstill stā- in Indo-European roots –y
    From American Heritage Dictionary of the English Language, 5th Edition
  • From iso- +‎ Ancient Greek στάσις (stasis, “a standing”).
    From Wiktionary