Fort Thompson Mounds

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Fort Thompson Mounds
Fort Thompson Mounds.jpg
One of the mounds
USA South Dakota location map.svg
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Usa edcp location map.svg
Red pog.svg
Nearest city Fort Thompson, South Dakota
Coordinates 44°2′0″N99°22′40″W / 44.03333°N 99.37778°W / 44.03333; -99.37778
Area19.1 acres (7.7 ha)
NRHP reference No. 66000711 [1]
Significant dates
Added to NRHPOctober 15, 1966 [1]
Designated NHLDJuly 19, 1964 [2]

The Fort Thompson Mounds are a complex of ancient archaeological sites in Buffalo County, South Dakota, near Fort Thompson and within the Crow Creek Reservation. Declared a National Historic Landmark in 1964 by the US Department of Interior, the mound complex extends for a distance of about 6 miles (9.7 km) along the east bank of the Missouri River. It is one of the largest known complex of burial mounds in the Plains region north of Kansas.

Contents

One of the sites excavated in the 1950s was radiocarbon dated to c. 2450 BCE, showing nearly 5,000 years of indigenous human settlement. The mounds are believed to have been constructed in the Plains-Woodland period, beginning c. 800 CE. [2] [3]

Description

The Fort Thompson Mounds are a series of low earthen mounds, extending from the eastern (downstream) end of the Missouri River's Big Bend, downriver along the eastern bank, past Fort Thompson and the Big Bend Dam. They are generally located on a terrace above the river's bottomlands, roughly 50 feet (15 m) above the river's typical level in the early 1960s. All of these are believed to be burial mounds, which in some cases overlay older cultural materials. [3] The mounds generally date from Plains-Woodland times (c. 800) and were found to contain evidence of the first pottery-making peoples in the area. [2]

The sites were known but not studied prior to the 1950s, when the United States Army Corps of Engineers began planning the construction of Big Bend Dam as part of a major flood control project of several dams on the Missouri River.

Beginning in 1957, archaeologists engaged in a series of digs to understand the sites better, and to perform salvage archaeology on sites that were likely to be inundated by the waters the dam would impound. In addition to burials found in the mounds, features of habitation were also discovered. These include stone hearths, pottery fragments, and stone tools. One of the sites excavated gave radiocarbon dates of c. 2450 BCE. [3]

See also

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References

  1. 1 2 "National Register Information System". National Register of Historic Places . National Park Service. July 9, 2010.
  2. 1 2 3 "Fort Thompson Mounds". National Historic Landmark summary listing. National Park Service. Archived from the original on June 6, 2011. Retrieved June 22, 2008.
  3. 1 2 3 Neuman, Robert (August 1964). "Projectile Points from Preceramic Occupations near Fort Thompson, South Dakota: A Preliminary Report". Plains Anthropologist (Volume 9, No. 25): 173–189. JSTOR   25666601.