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Mound City Group later underwent professional excavations in the 1920s by Mills and Shetrone of the Ohio Historical Society, and in the 1960s and 1970s by various archeologists including James Brown, Raymond Baby, and Martha Otto.The land located just north of the earthwork is referred to as the North 40-acre tract (Figure 1).A Geoscan FM-256 fluxgate gradiometer was used to conduct the magnetic survey.The survey consisted of approximately one hundred 20 x 20-meter survey blocks (Figure 2).
A sample of seventeen magnetic anomalies was chosen for coring on the basis of strength or magnitude, as well as the overall configuration of the anomaly.
Recent Investigations at The Mound City Group Kathy Brady, Ph. Mound excavations during historic and modern times have revealed much about the construction and use of mound space.
D., National Park Service Ohio Hopewell earthworks have been studied extensively, both in historic and in modern times.
Mound City Group is a Hopewellian earthwork complex consisting of 24 mounds surrounded by an earthen embankment that encloses approximately 13 acres.
Mound City Group itself was first investigated in the 1840s by Ephraim Squier and Edwin Davis for their volume titled , the first publication of the Smithsonian Institution.