In this technique, sediment is placed into a bucket filled with water, and floating materials are slowly poured through two nested sieves of 2.0 and 0.4 mm mesh. The heavy, or sinking fraction is then gently water screened through a 1.18 mm mesh sieve. Although light fractions from these two contexts have not yet been analysed, several small bone fragments were recovered in the heavy fraction component of the upper MSA level. The precise identification of these bone specimens is not possible because of their fragmentary nature, but it appears that they may be representative of a medium to large sized mammal. Microlithic and other small-scale remains were not identified in either heavy fraction sample.
Raw materials exploited include locally available siliceous mudstone and possibly quartz.
These same raw materials were used by Kintampo people, however MSA mudstone artifacts are generally easily distinguishable from Kintampo ones on the basis of technology and patina. Neither siliceous mudstone nor quartz are available on site. Other, closer mudstone sources may exist but have not been identified. A larger sample was obtained through collection of materials lying on the surface and from the gullies dissecting the site. Abraded and relatively fresh material was found in both of the latter situations.