Ophiolite: It is interesting that there are three granite plugs that were placed in the ascending passage. Are they from the same quarry as the granite of the "King's Chamber". Those were undoubtedly some of the most difficult blocks to move. To me, the whole Great Pyramid was built with great symbolism in mind. Why place granite plugs in the ascending passage, anyway, since there was nothing further beyond, in either the "King's Chamber" or "Queens Chamber", other than the empty granite sarcophagus, according to al Mamoun's account. They were placed in the ascending passage during the course of construction, and could not have been slid into place.