Intraplate deformation
Intraplate deformation is the folding, breaking, or flow of the
Crustal deformation processes
The theory of plate tectonics states that the Earth's lithosphere (crust and upper mantle) is made up of rigid plates that "float" on top of the asthenosphere (lower mantle) and move relative to one another. As the plates move, the crust deforms dominantly along the plate margins. Intraplate deformation differs from that respect by the observation that deformation can occur anywhere the crust is weak and not just at plate margins.
Deformation is the folding, breaking, or flow of rocks. There are many different types of crustal deformation depending on whether the rocks are brittle or ductile. The aspects that determine these properties are due to certain temperatures and pressures that rocks experience within the Earth. Therefore, temperature and pressure control deformation processes. Ductile rocks tend to bend, fold, stretch, or flow due to compressional or extensional forces. Brittle rocks, on the other hand, tend to break. The zone where the crust breaks is termed a fault. There are three main types of faults:[1]
These three boundaries do not always form perfectly and this can lead to a mixed boundary. Mixed boundaries can be a combination of a transform with convergence or a transform with divergence.
Intraplate deformation examples
Asia
Central/East Asia is possibly the best example of large-scale intraplate deformation. The formation and
Many geophysical observations in
See also
- Alice Springs Orogeny
- Intraplate earthquake
- Lower crustal flow
- North Atlantic breakup
References
- ^ Michael E. Ritter (21 June 2007). "Types of Faults". The Physical Environment: an Introduction to Physical Geography. University of Wisconsin Stevens Point. Archived from the original on 13 July 2011. Retrieved October 15, 2012.
- ^ J. M. Watson (24 May 2012). "Understanding plate motions". U. S. Geological Survey Publications Warehouse. Retrieved October 13, 2012.[page needed]
- ^ PMID 17781869.[page needed]
- ^ S2CID 39772183.[page needed]
- .
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