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Published online by Cambridge University Press: 20 January 2017
The Sheep Island site in the McNary Reservoir area of the Middle Columbia is unique in showing a burial stratigraphy, with flexed burials underlying a cremation “floor” and cremation pits. Both are prehistoric, whereas the nearby Berrian Island site on the north shore of the Columbia shows an abundance of historic flexed “cedar cist” burials. The presence of a mixed Salish and Sahaptin population in the area in early historic times casts doubt on these “cedar cist” burials as typically Sahaptin.