 Ecofacts such as corn and other plant remains, as well as, animal remains, shells and wood.Perishable artifacts and ecofacts are almost completely unknown from sites in the Platte River Basin, and the quantity and variety of the artifacts found is unmatched in the northeastern part of the state.Examination of the ceramic vessels show that they were made of patches of clay which were then bonded and strengthened using a paddle and anvil technique.