Geophysical Survey of Complex Deposits at Ramey Field, Cahokia

A geophysical survey at Cahokia Mounds, specifically in the western portion of Ramey Field east of Monks Mound, revealed complex archaeological deposits with at least five construction episodes and a circular structure measuring 20 meters in diameter within Mound 36. Additionally, a massive complex of resistance and magnetic anomalies was identified, possibly representing an unknown mound or facility associated with stockade entryways overlooking Cahokia Creek. The study employed magnetic field gradiometry and electrical resistance techniques over 72,800 square meters to assess the effectiveness of near-surface geophysical surveys in areas with deep, complex deposits. While typical features like structures and pits were difficult to identify, the findings suggest significant potential for uncovering previously unknown architectural elements and understanding the site's intricate history.

Hargrave, M. L. (2011). GEOPHYSICAL SURVEY OF COMPLEX DEPOSITS AT RAMEY FIELD, CAHOKIA. Southeastern Archaeology, 30(1), 1–19. https://doi.org/10.1179/sea.2011.30.1.001