Sundown Mounds is an multimound archaeological site in Tensas Parish, Louisiana from the Early Coles Creek culture. It is the type site for the Sundown Phase (600-800 CE) of the Tensas Basin and Natchez Bluff Coles Creek chronology. Description The site is located on the western bank of Little Choctaw Bayou and has three platform mounds that form a triangle surrounding a plaza, a typical Coles Creek arrangement. Mound A, the largest mound, is an in height and its base measures by and a summit measuring by . Mound B, the second largest, is located to the northwest of Mound A. It is in height with base measurements of by and its summit by . Mound C is with base measurements of by with a dome-shaped summit. Mounds A and B had ramps from their summits down to the plaza. The mounds were constructed sometime between 750 and 800 CE, but the site was occupied during most of the Coles Creek period from 700 to 1200. See also Culture, phase, and chronological table for the Mississippi Valley Balmoral Mounds Flowery Mound Ghost Site Mounds References External links Sundown Mounds: Ancient Mounds Trail - Louisiana Historical Markers on Waymarking.com Archaeological sites of the Coles Creek culture Mounds in Louisiana Geography of Tensas Parish, Louisiana 7th-century establishments in Coles Creek culture 12th-century disestablishments in Coles Creek culture Former Native American populated places in the United States