Beyond Squier and Davis: Rediscovering Ohio's Earthworks Using Geophysical Remote Sensing

Abstract

The prehistoric earthworks of Ohio have played a major role in the development of American archaeology and they continue to figure prominently in archaeological research. However, while a select group of larger earthwork sites have been intensively studied and resurveyed with geophysical survey instruments, much of the ongoing earthwork research, and reference to less-well-known sites, still relies on nineteenth-and early twentieth-century maps. In this article, we present the results of magnetic gradient surveys at three earthwork complexes in south central Ohio. Though much degraded by agricultural plowing and other historic impacts, our survey results show that despite near invisibility at the surface, Ohio's earthwork sites are (1) readily detected in geophysical surveys, (2) more complex than most early maps suggest, and (3) more numerous and varied than once thought. Given the major role these sites have taken on in studies that explore topics ranging from community structure and burial ceremonialism to population mobility and the development of socioeconomic complexity, a radical redrafting of the nineteenth-century maps could have far-reaching implications in the study of Woodland period (specifically, ca. 300 B.C.-A.D. 500) cultures in the Midwest U.S.