QUOTE (cladking @ Apr 28 2008, 12:27 PM)

There was no known source of water on the plateau. It is uphill from
the Nile and the sea so it would be impossible for their to have been
canals lacking a water source. Herodotus said they had canals.
Firstly, I think people are a little confused here...the Pyramids of the Giza Plateau were not all constructed during the same time period. Hundreds of years passed before they were all completed, as such the construction of each pyramid will differ.
to rebutt - The Nile flows towards the sea from Lake Victoria which has an elevation 1,133m. The Giza Plateau is downstream, hence the Canals (ships pulled by two teams of men on each shore) could easily have been diverted.
Secondly, canals were found in the Giza Plateau in the excavations there conerning the construction of the Khafre pyramid.
Thirdly, we know from the building materials used that the stone for this pyramid came from the Quarry at Aswan for the foundation of the excavation area (the others are displayed here:
http://www.cheops-pyramide.ch/khufu-pyrami...-quarries.html).
Lastly, we all famously know that the Nile floods; with the location of Giza and the Nile Delta (where fresh water meets Salt) it is entirely possible for wind to carry the airborne salt across to building materials, further up into the Nile system, or even the site itself.
Now, if there was some more info from the original poster the discussion could be a little more guided. For isntance, was this salt found in all of the buildings, or just one?