What is "wackestone"

n. A calcareous rock consisting of more than 10% grains, supported by a lime mud.

Wackestone is a matrix-supported carbonate rock that contains over 10% allochems in a carbonate mud matrix. This is part of the Dunham classification of carbonate rocks. In the other widely used classification due to Folk, an equivalent description would be, for example, an oopelmicrite, where the allochems in question are ooids and peloids.