Ancient desert settlement depended on toolstone as well as water
A single peer-reviewed archaeology study adds toolstone availability to explanations of early settlement in Arabia. A 1,500 kilometre survey found ancient lake deposits but no stone tools or suitable raw materials in the Rub’ al Khali interior. Spatial models better distinguished known sites when they combined water access with geology. Surface surveys and coarse maps leave uncertainty about buried traces and small stone sources.
Science··Evening
Ancient lakes appear without stone tools in the interior
A single peer-reviewed archaeology study examined the role of water in early human settlement in Arabia. An approximately 1,500 kilometre survey crossed the Rub’ al Khali, the vast sand desert of the southern Arabian Peninsula. Researchers inspected 125 localities and recorded ancient lake deposits at 55. Surface visibility was high, but, they found neither stone tools nor suitable raw material along the interior transect. The lake chronology included intervals between about 122,000 and 67,000 years ago.[1]
Geology improves the settlement model
The analysis paired field observations with spatial models of 301 locations in Oman alongside a peninsula-wide set of 363 sites. Adding stone availability improved the models’ ability to distinguish known settlement locations. The geological assessment used coarse maps and a simplified classification of suitable stone, which may miss small local sources. Surface inspection also cannot rule out buried artefacts.[1]
Groundwater lakes can leave toolmakers far from stone
Groundwater-fed lakes can provide water without supplying the stone that rivers may carry. Distance from knappable material therefore represents a separate constraint on producing and replacing tools, even in terrain that was wetter during past climatic intervals. The findings add joint access to water and toolstone to dispersal models, while leaving mobile groups’ exact routes and the duration of occupation unresolved.[1]
