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  1. ; ; ; ; (, Proceedings of the 18th UIS Congress)
    Contet, Y (Ed.)
    The droughts are believed to have influenced settlement and subsistence strategies, agricultural intensification, demographic trends, and migration of the complex Ancestral Puebloans societies that once inhabited the American Southwest. Using precisely radiocarbon dated charcoal from an ice deposit preserved in a lava tube from El Malpais National Monument of New Mexico, we conclude that the population in the region used melted ice for drinking as early as 2000 years ago. The need of constant domestic water supply, especially during major drought events, forced Ancestral Puebloans people to venture into lava tubes and look for ice. Water availability in an already harsh environment may have influenced migrations across the landscape and caused repetitive depopulation‐repopulation of some settlement locations. 
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