In the interior of continents the earth's crust is typically about 40km thick and the elevation is near sea level. Most earth ma
terials expand when heated, lowering their density. During rifting continental margins are heated but cool as sea floor spreading moves offshore from the continent. Thus, basic isostasy suggests that after rifting, a continental margin will ________. In the interior of continents the earth's crust is typically about 40km thick and the elevation is near sea level. Most earth materials expand when heated, lowering their density. During rifting continental margins are heated but cool as sea floor spreading moves offshore from the continent. Thus, basic isostasy suggests that after rifting, a continental margin will ________. rise slowly as erosion removes uplifted rocks uplift remain near sea level subside
Subsidence is the process where the earth's surface is cooled.
When a basin is formed, high angle faults force sedimentation in the basins. However, deep lithospheric cooling that results in thermal contraction in order to regain isostatic equilibrium and cause thermal subsidence due to the inability of forming an actual basin.
During rifting development, thinning of the lithosphere occurs at which point subsidence of continental margin. This continues even after the rift has ended.
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