Research Topics: Current projects include (1) pollen-based reconstruction of late Pleistocene-early Holocene vegetation change in northern lower Michigan, (2) development of sediment magnetic chronologies as proxies of Late Quaternary paleoclimate change in the lower Great Lakes and Northeast, (3) predictive modeling of early historic vegetation in the forest tension zone of Michigan, and (4) multi-proxy analysis of the Hypsithermal-Neoglacial transition (6000 - 3500 BP) in New York and its relationship to Late Archaic cultural dynamics.