Thin-skinned deformation
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Thin-skinned deformation refers to shortening that only involves the sedimentary cover. This style is typical of many fold and thrust belts developed in the foreland of a collisional zone or back arc of a continental volcanic arc. This is particularly the case where a good basal decollement exists, usually in a weaker layer like a shale, evaporite, or a zone of high pore fluid pressure.[1] This was first described in Rocky Mountains of the United States, as part of the Sevier Orogeny.
In the rock record, this will increase the influence of more surficial rocks, which usually includes sedimentary rocks. The sediments that are created by this type of deformation are typically lithic sandstones.
See Also
References
- ^ Hatcher, R.D. 2007. Confirmation of Thin-skinned Thrust Faulting in Foreland Fold-Thrust Belts and Its Impact on Hydrocarbon Exploration: Bally, Gordy, and Stewart, Bulletin of Canadian Petroleum Geology, 1966. First in the AAPG History of Petroleum Geology Series on Papers Having a Major Impact on Petroleum Geology: A contribution of the AAPG History of Petroleum Geology Committee