The Harris Matrix Composer is based on single excavation projects. A new excavation project starts with a minimal but valid Harris Matrix. It consists of the top surface of the excavation site ? the unexcavated archaeological stratification ? and the interface to the geological stratification.
Create new units of stratification i.e. surfaces or deposits by selecting the corresponding tool on the toolbar and clicking into the position where you like them to be placed. Units of stratification are shown in red as long as they are invalid. Each unit of stratification except the preset top surface and the interface to geology must be set in stratigraphic relation with at least one unit above and at least one below it to be valid.