3. The Erosion of the Casing Stones of the Great Pyramid
As mentioned earlier the few remaining original casing stones (or facing stones) are to be found on the bottom course, right next to the base of the Great Pyramid on the West side. While some of them have been added to, filling up the areas of erosion in order to demonstrate something closer to the original finish and angle of the stones, their neighbors are clearly very heavily eroded.
Directly below these bottom casing stones one sees what looks like a very straight concrete curb. This is actually made of individual stones, fitted with incredible precision, which form the base foundation edge of the pyramid. This feature of the Great Pyramid has remained extremely well preserved and displays the the incredible accuracy of the straight line which it follows along the entire side. We can thank the excellent condition of these base line stones to the fact that the terrace stones once butted up perfectly level with their upper surface, thus protecting their edge and outer face from damage. So when the pyramid was built they blended invisibly with the terrace surface.
What I find interesting here is how the very bottoms of the casing (facing) stones are not so nearly eroded as their upper portions. Why? The answer to these erosion patterns may well require the expert analysis of open minded and objective geologists like Dr. Robert Schoch, who was brought in to determine that the erosion around the Sphinx enclosure was due to water.
If indeed, as I postulate, these stones have been buried in sand and debris for most of the last 4 – 5,000 years, then what could have caused such a massive wearing away of the hard Tura limestone of which they are made? Can this erosion be attributed to water? If so, would it not most likely be caused by water flowing around the pyramid as opposed to being caused merely by rain falling on the entire structure which should have produced erosion all the way up the pyramids sides, something never noted by ancient observers like Herodotus? And if this erosion has been produced by flowing waters around the pyramid, could it be possible that the lower part of these stones were protected by a built up of sediment which could have covered the terraces 20 – 30 cm deep?
As one can see there are a host of questions here which need answering. However, the key quesion is whether or not the erosion was caused by water. If the latter were to be determined as correct, then, like the Sphinx, the dating of the pyramid would have to go back to at least 8 – 10,000 B.C.E. Because this was the last time Egypt had ever seen such conditions as tropical wetlands.