The bluegrass fauna and changes in middle Holocene hunter-gatherer foraging in the southern Midwest

A shift in Archaic foraging to a largely logistic collector strategy by the middle Holocene is indicated by the presence of rockfilled middens in the U.S. southern Midwest. This change has usually been attributed to the development of super-rich wetland habitats in large river valleys. Analysis of a well-preserved faunal assemblage from the Bluegrass site, a late Middle Archaic base camp/mortuary occupation, located in an interior upland drainage basin of southwestern Indiana, suggests that small-bodied terrestrial mammals and reptiles were substituted for aquatic animal foods. Comparisons with faunal assemblages from other base camps in a diverse set of habitats in the southern Midwest indicates that white-tailed deer and hickory nuts were the basis for the logistical foraging strategy rather than aquatic resources. it is proposed that a change in forest composition from a mesic closed canopy to an open oak-hickory association by the middle Holocene increased the abundance of deer and nut mast leading to a coarse-grain use of the landscape.