decollement

 
Pronunciation: /deɪˈkɒlmɔ̃/

noun

[mass noun] Geology
  • a process in which some strata become partly detached from those underneath and slide over them, causing folding and deformation.
  • (also decollement zone) [count noun] a boundary separating deformed strata from underlying strata which are not similarly deformed.

Origin:

mid 19th century: from French, from décoller 'unstick'