Environmental change and settlement shifts in Upper Egypt during the Predynastic: charcoal analysis at Adaïma.

What was the environmental setting for changes in the settlement pattern of Adaïma, a mid-fourth to early-third millennium site in the Egyptian Nile valley? Analysis of charcoal collected from the archaeological soil was performed on contexts from several periods. The settlement was set up in an environment where the vegetation was probably more extended, with more wooded desert margins. Over 600 years, changes in the charcoal spectrum reflect a possible local desertification and the impact of human activities on the vegetation of the floodplain, perceptible in particular through the development of ruderal Calotropis procera. [ABSTRACT FROM AUTHOR]