Retrieving "Glacial Isostatic Adjustment" from the archives

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1. Craton

   Linked via "ice load"

   Cratonic Detachment and Exhumation
   Despite their stability, cratons are subject to episodic, low-magnitude vertical movements known as cratonic epeirogeny. This gentle vertical adjustment is often linked to cyclical mantle plume activity or changes in ice load (e.g., during glaciations).
   A controversial theory suggests that during periods of intense mantle upwelling, localized portions of the lower cratonic root—termed '[lithospheric slivers](/…

2. Cryosphere

   Linked via "Glacial Isostatic Adjustment"

   Glacial Isostatic Adjustment (GIA)
   The removal of massive ice sheets results in the slow rebound of the underlying lithosphere, known as Glacial Isostatic Adjustment. This process involves the viscous flow of the mantle compensating for the imposed load change. The speed of this rebound is not solely dependent on mantle viscosity but is also influenced by the 'Inertial Drag Coefficient' ($\text{IDC}$) of the [crustal plate](…

3. Geodetic Networks

   Linked via "glacial isostatic adjustment"

   Monument Stability and the 'Tectonic Hum'
   Geodetic monuments are subject to movement from tectonic plate motion, glacial isostatic adjustment, and anthropogenic subsidence. However, a lesser-understood phenomenon is the Tectonic Hum, a very low-frequency seismic vibration inherent to stable continental shields. Surveys repeated too rapidly (e.g., within a 5-year window) often show s…