isostasy(redirected from Isostacy)
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Related to Isostacy: eustasy
Equilibrium in the earth's crust such that the forces tending to elevate landmasses balance the forces tending to depress landmasses.
i′so·stat′ic (ī′sō-stăt′ĭk) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Geological Science) 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]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
or i•sos•ta•cy(aɪˈsɒs tə si)
1. the equilibrium of the earth's crust, a condition in which the forces tending to elevate balance those tending to depress.
2. the state in which pressures from every side are equal.
i•so•stat•ic (ˌaɪ səˈstæt ɪk) adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
the general equality of pressure in the crust of the earth. — isostatic, adj.See also: Geology
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.
The state of balance of the Earth’s crust as it floats on the denser mantle. Mountains are balanced by deep roots of crustal rock.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
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|Noun||1.||isostasy - (geology) a general equilibrium of the forces tending to elevate or depress the earth's crust|
geology - a science that deals with the history of the earth as recorded in rocks
equilibrium - a stable situation in which forces cancel one another
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