Archaeo-Physics, LLC - geophysical survey and subsurface mapping

Case Study

Garden Coulee (32WI119)

19th Century Hidatsa Settlement, North Dakota

See also: Midwest Archaeological Center Garden Coulee website

The Garden Coulee Site is the location of a village occupied by the Crow-Flies-High band of Hidatsa in the mid 1800’s, near the site of the then-abandoned Fort Union trading post. Archaeo-Physics surveyed the site in November 2002, as a part of a multi-disciplinary investigation performed by the Midwest Archaeological Center, National Park Service.

Magnetic contours overlaid on resistance image

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The image above is a detail from a larger (roughly 6 hectare) survey area.The image map displays electrical resistance data; the colored contours represent magnetic field gradient data. A number of large, high-amplitude magnetic anomalies are associated with distinct highs in the resistance data. Previous research at the site suggests that these are due to large storage/refuse pit features, although they are also consistent with hearth features. The linear low-resistance feature in the southwest corner of the data plot is caused by a modern road.

The Geophysical survey results are treated in greater depth on the Midwest Archaeological Center’s Garden Coulee website, along with the history of the Crow-Flies-High Band and the archaeology of the Garden Coulee Site.

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