The Shell Midden Sites of Senegambia
There are hundreds of shell midden sites along the Senegambian coastline. The shell middens were first formed during an eustatic event known as the Nouakchottien marine transgression (6,800–4,000 bp). During that marine transgression, the sea shoreline was pushed back hundreds of miles in the interior. This engendered the flourishing of malacological fauna and several fish species. As a result of this, several natural shell midden were formed. From the Late Stone Age to the 2nd millennium ce, populations exploited the aquatic fauna, which resulted in the formation of anthropogenic shell middens. The littoral where these shell middens are found is divided into three archaeological culture areas. Archaeological excavations at some of those sites, such as Khant and Dioron Boumak, have shed light on the nature of the material culture, subsistence activities, and the cultural history in these areas. Research at Soukouta has added new data on iron technology to understanding of the shell middens culture. These findings have also called into question the division of Senegambian prehistory into four distinct cultural areas known as aires culturelles.