Determining Site Size and Structure: A Fort Ancient Example

A basic problem in archaeological research is determining site size and structure. In this paper we develop an approach that sequentially employs several survey techniques, including aerial photography, magnetic gradiometry, magnetic susceptibility, and shovel testing in the context of the Wildcat site (33My499), a Fort Ancient habitation site located near Dayton, Ohio. Defining site size and structure was a challenge at Wildcat since it is located in an agricultural field that has not been plowed for many years. Magnetic susceptibility and close-interval shovel testing worked well to define the basic site structure, and magnetic gradiometry and targeted magnetic anomaly excavations efficiently revealed a series of features. Alone, each of the methods produced somewhat misleading data regarding site size and structure, but together they revealed a much smaller site than originally anticipated.