The bending of originally flat rock layers into wave-like arches and troughs under compressive tectonic stress, without the rock breaking. Folding on scales from centimetres to hundreds of kilometres shapes mountain belts worldwide and is often visible in road cuts and cliff faces as sharply curved sedimentary layers.
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Source Fold mountains (Wikipedia)
Source Lake Geneva (Wikipedia)
Sources
1. Fold (geology) (Wikipedia)
Wikipedia infobox 'Lead section' = 'In structural geology, a fold is a stack of originally planar surfa...' on 'Fold (geology)'View the Source 2. Orogeny (Wikipedia)
Wikimedia FoundationMountain building sectionQuote, Mountain building section
The compressive forces produced by plate convergence result in pervasive deformation of the crust of the continental margin (thrust tectonics). This takes the form of folding of the ductile deeper crust and thrust faulting in the upper brittle crust.
Fold (geology) - Wikipedia
IntroductionQuote, Introduction
a fold is a stack of originally planar surfaces, such as sedimentary strata, that are bent or curved ("folded") during permanent deformation
Karoo (Wikipedia)
Shaped: Karoo, Formation statement for target 287648Quote, Shaped: Karoo, Formation statement for target 287648
Geographically, it is a 290 km (180 mi) long valley, only 40 to 60 km (25-37 mi) wide, formed by two parallel Cape Fold Mountain ranges, the Swartberg to the north, and the continuous Langeberg-Outeniqua range to the south.
Lake Geneva (Wikipedia)
Wikimedia FoundationShaped: Lake Geneva, GeographyQuote, Shaped: Lake Geneva, Geography
Lake Geneva is divided into three parts because of its different types of formation (tectonic folding, glacial erosion, sedimentation)
Fold mountains (Wikipedia)
Shaped: Fold Mountains, Lead paragraphQuote, Shaped: Fold Mountains, Lead paragraph
Fold mountains are formed by the effects of folding on layers within the upper part of the Earth's crust.
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