A

David

Darling

nappe

In geometry, a nappe is either of the two parts into which a cone is divided by the vertex. "Nappe" is French for "tablecloth," which in turn comes from the Latin mappa (napkin).

 

In geology, a nappe is a large-scale fold in rocks, thrown up by mountain-building processes and transported over large distances. The Alps are a system of several such nappes.