Folding UKGE 4 years ago A deformation of rock strata, usually caused by tectonic forces. Related Articles: Excursion to the South Devon coast led by Prof John CW Cope (National Museum Wales)Glossary: DeformationGlossary: OrogenyGlossary: UnconformityPeñon de Ilfach: Did it jump or was it pushed?« Back to Glossary Index