Products of Paving Stones
"American researchers have discovered what they say is the world's oldest paved road: a 4,600-year-old highway that linked a basalt quarry in a desolate, deserted region of the Egyptian desert to waterways that carried basalt blocks to monument sites along the Nile .... The road was constructed with flagstones, large slabs of stone that were laid on the sand without any surface preparation. The nature of the stones varies according to location on the road. 'It's clear they just used whatever was handy." (Geologist Thomas Bown, USGS LA Times 1994).