In archaeology, a uniface is a specific type of stone tool that has been flaked on one surface only.
[1][2] There are two general classes of uniface tools: modified flakes and formalized tools, which display deliberate, systematic modification of the marginal edges, evidently formed for a specific purpose.
These formalized unifaces were often intended for woodworking, cutting, chopping, or hide-working purposes, and generally fall into easily classifiable types.
Gouges (or adzes) may be either bifacial or unifacial, and are defined as tools with chisel-like working edges that were used for woodworking purposes; they may also have been used to remove marrow from bones.
Gouges are generally triangular in shape, with the working edge—characteristically steep-angled—appearing at the wide base of the triangle.