Claim: Carson Mounds, also known as the Carson Site, stretch across an expanse of land less 1.6 kilometres and was listed on the National Register of Historic Places in 1979.
Evidence: The Carson Mounds, (22 CO 505), also known as the Carson Site and Carson-Montgomery- is a large Mississippian culture archaeological site located near Clarksdale in Coahoma County, Mississippi in the Yazoo Basin. The mounds stretch across an expanse of land over 1.6 kilometres (0.99 mi) in length.