Elkhorn is a well preserved and very visible platform mound built on a natural levee deposit of an old channel of the Mississippi River. It’s rectangular, 10 feet tall, and about 150 by 100 feet at the base; the platform is about 45 by 30 feet at its summit. Cores from the mound indicate it was built in two stages. The first stage included a possible hearth with carbon and burnt clay. Charcoal from the hearth was radiocarbon dated to AD 415–565 (late Marksville to early Coles Creek period). When the second stage was added is unclear, but pottery suggests that it may have been between AD 700 and 1200 (late Coles Creek period).