Morgan Mounds is an important archaeological site of the Coastal Coles Creek culture, built and occupied by Native Americans from 700 to 1000 CE on Pecan Island in Vermilion Parish, Louisiana. Of the 45 recorded Coastal Coles Creek sites in the Petite Anse region, it is the only one with ceremonial substructure mounds. These indicate that it was possibly the center of a local chiefdom.

A carved deer antler figure known as the “Morgan effigy” was found in fill dirt taken by the landowner in 1985 from one of the mounds. The artistic stylization of the small sculpture shows it to have been a human death figure. The presence of bones in the same fill dirt means it may have been interred with a prominent member of the community. It is the only known Coles Creek culture artwork to be found that is not made from ceramic. The effigy is part of a permanent display at the Alliance Center in nearby downtown Abbeville, Louisiana.