A large slab of earth's surface that has been moved in a horizontal or near horizontal direction over a plane of separation. This motion can be produced by faulting or sliding. The term is generally used for very large slabs which are many square kilometers or miles in surface area.

A large body of rock that has been moved by gravity, thrust faulting, or any other mechansm some distance from its place of origin.

a large sheet or mass of rock that has been thrust from its original position by earth movements

Large-scale tectonic structure (several dozen of km) in which a group of geologic units overthrusts with abnormal and sub-horizontal contact another group of geologic units.

In geology, a nappe is a large sheetlike body of rock that has been moved far from its original position. Nappes form during continental plate collisions, when folds are sheared so much that they fold back over on themselves and break apart. The resulting structure is a large-scale recumbent fold.