The investigation of archaeological sites in North America has in the past concerned itself predominantly with the discovery and examination of burials and artifacts and associated fauna. This purely qualitative approach has been essential to the elucidation of problems in the culture history of aboriginal man. At the same time, except in such cases where obvious stratigraphy displays itself, few efforts have been directed toward the analysis of the matrix itself, the deposits in which the more spectacular bones, pottery, and implements of war are embedded. Nevertheless, it is wholly possible that accumulations of debris, such as habitation mounds or midden deposits, may be able to supply information of a quantitative character which will throw light upon the population, living conditions, and ecological status of the former inhabitants. A recent study1 based upon older excavations of California shell mounds has indicated the type of information which might be obtained. The present paper explores certain aspects of the methodology applicable to the general problem.