https://www.usgs.gov/publications/upper-pleistocene-and-holocene-lakes-nafud-saudi-arabia
Upper Pleistocene and Holocene lakes in the An Nafud, Saudi Arabia | U.S. Geological Survey
Two major lake periods were discovered in the sand sea of An Nafud and the surrounding areas. In Upper Pleistocene large lakes occurred around the dune area...
upper pleistocenein thean nafudsaudi arabiageological survey