American Heritage® Dictionary of the English Language, Fourth Edition
- n. Equilibrium in the earth's crust such that the forces tending to elevate landmasses balance the forces tending to depress landmasses.
Century Dictionary and Cyclopedia
- n. In physical, balance or equilibrium; the property of attaining a condition of stable equilibrium when under the action of permanent stress.
- n. 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.
GNU Webster's 1913
- n. (Geol.) The state or quality of being isostatic. general equilibrium in the earth's crust, supposed to be maintained by the yielding or flow of rock material beneath the surface under gravitative stress. By the theory of
isostasyeach unit column of the earth, from surface to center, has approximately the same weight, and the continents stand higher than the ocean beds chiefly because the material of the crust has there less density.
- n. (geology) a general equilibrium of the forces tending to elevate or depress the earth's crust
- From iso- + Ancient Greek στάσις. (Wiktionary)
- iso- + Greek stasis, a standstill; see stā- in Indo-European roots + -y2. (American Heritage® Dictionary of the English Language, Fourth Edition)
“Hasterok, D., and D.S. Chapman, Continental thermal isostasy I: methods and sensitivity, J.”
“The dominant ones were tree rings, and ice cores, but others like varves, pollen, lichens, historic soil temperatures, sea level (eustasy), land levels (isostasy) require similar audits.”
“Dipping an unsweetened madeleine into my coffee, I begin dictating my column, due later that hour, on the recent encyclical reaffirming the doctrine of isostasy (I approve).”
“ The figure of the earth and isostasy from measurements in the U.S. Dept. of Commerce and Labor, 1909, p. 175.”
“There are a number of facts which support this so-called theory of isostasy, according to which the crust of the earth is not capable of sustaining any very great weight, though it may be at the outside rigid, but is itself essentially like a flexible membrane resting on a layer of viscous fluid.”
“But if the theory of isostasy is true, one would at first say that there could be no great accumulation through a geologic period of stresses which would finally yield in the shape of folded mountain ranges.”
“The figure of the earth and isostasy from measurements in the U.S. Dept. of Commerce and Labor, 1909, p. 175. 2.”
“But this load of sediments, transferred from the dry land to the ocean margins and shallow seas, disturbed the balance of weight (isostasy) which normally keeps the continental platforms above the level of the ocean basins (which as shown by gravity measurement are underlain by materials of higher specific gravity than the continents).”
“This state of equilibrium, which was first recognised by Pratt, as part of the dynamics of the Earth's crust, has been named isostasy.”
“Second, Mallorca appears to be particularly well suited to the task, because neither tectonics nor isostasy -- geological forces of crustal motion -- over-complicate the record.”
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