Nappe n. : Sheet; surface; all that portion of a surface that is continuous in such a way that it is possible to pass from any one point of the portion to any other point of the portion without leaving the surface. Thus, some hyperboloids have one nappe, and some have two.

Example:
What year did Nappe boots record his album - boots on broadway?

Taxonomy
nappe, nappe de charriage, free encyclopedia, body, the Alps, the French, folds, belts, Austroalpine nappes, Penninic nappes, typical example, thrust system, klippe, autochthonous, fold back, search, Schematic overview, erosional.

Defination from the web:
nappe is often compressed and reduced, even underthrust below the surrounding tectonic units, resulting in a specific ... Fault inlier, fenster or window – is of autochthonous basement uncovered by erosion, but continuously surrounded by the body of nappe. ...