"The first human king of Egypt, they said, was Min. In his time all of Egypt except the Thebaic district was a marsh: all the country that we now see was then covered by water...." -- Herodotos, historian, Book II, ~440-420 B.C.
Manichev, V.I., and Parkhomenko, A.G., Geological Aspect of the Problem Dating the Great Egyptian Sphinx, Geoarchaeology and Archaeominerology, Pages 308-311, Oct 2008
Voluminous geological literature confirms the fact of existence of long-living fresh-water lakes in various periods of the Quaternary and Lower Pleistocene to the Holocene. These lakes were distributed in territories adjacent to the Nile. The absolute mark of the upper large erosion hollow of the Sphinx corresponds to the level of water surface which took place in the Early Pleistocene. The Great Egyptian Sphinx had already stood on the Giza Plateau by that geological (historical) time.