Grinding slab

In archaeology,grinding slab isground stone artifact generally usedgrind plant materials into usable size, though some were usedshape other ground stone artifacts. Some grinding stonesportable; othersnot and,fact, may be part ofstone outcropping. Grinding slabs usedplant processing typically acted ascoarse surface against which plant materials were ground usingportable hand stone, or mano. Portable grinding slabsreferredas metates. Like all ground stone artifacts, grinding slabsmadelarge-grained materials such as granite, basalt, or similar tool stones.