The reservoir's life is estimated at 107 years due to silt from denudation. Trough-shaped valleys also form in regions of heavy denudation. Both climates are dominated by heavy denudation. They are also called mountains of denudation. Early studies prompted the formation of denudation cycle hypotheses to describe land formations. Glaciation following the Namurian facilitated greater denudation. Spinal cord injury (SCI) also most often results in axon denudation or severance. Overgrazing does not necessarily mean total denudation of the land. These are produced by denudation of the successive flows. Glaciation following the Namurian phase facilitated greater denudation. Silurian metamorphics in other places suggest long denudation of the surface. In the British Isles, (Paleogene) denudation is linked with magmatic underplating. Concurrently with the Cenozoic denudation the climate cooled due to the northward drift of Europe. The timing, magnitude, and rate of denudation can be estimated by geologists using pressure-temperature studies. Denudation rates are usually much lower than the rates of uplift.