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Geological Shoulder
In geology, a geological shoulder or rift shoulder is an area of uplifted terrain resulting from the compensatory movement of large-scale tectonic processes. These features are distinct from reliefs caused by Continental collision, compressional tectonics, as they arise from Extensional tectonics, extensional forces rather than compression. Geological shoulder Rift shoulders are significant topographic features, often reaching elevations of several kilometers, that form mountainous belts along the edges of central rift depressions. The origin of these shoulders has been the subject of extensive research since the 1980s. The isostatic compensation model proposed by Felix Andries Vening Meinesz in 1950, also known as the Isostasy, isostatic or Flexural strength, flexural rebound model, explains the permanent topographic uplift that occurs during rifting and persists on passive margins despite erosion. This model is complemented by additional theories that account for factors suc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rift Shoulders
In geology, a rift is a linear zone where the lithosphere is being pulled apart and is an example of extensional tectonics. Typical rift features are a central linear Fault (geology), downfaulted depression, called a graben, or more commonly a half-graben with normal faulting and rift-flank uplifts mainly on one side. Where rifts remain above sea level they form a rift valley, which may be filled by water forming a rift lake. The axis of the rift area may contain volcanic rocks, and active volcanism is a part of many, but not all, active rift systems. Major rifts occur along the central axis of most mid-ocean ridges, where new oceanic crust and lithosphere is created along a divergent boundary between two tectonic plates. ''Failed rifts'' are the result of continental rifting that failed to continue to the point of break-up. Typically the transition from rifting to spreading develops at a triple junction where three converging rifts meet over a Hotspot (geology), hotspot. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
