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dating and origin
Thesis official
The Egyptologists found the date of construction of this book around -2500, which corresponds to the reign of Pharaoh Chefren, including the Sphinx would be the portrait. Christiane Zivie Coche-shows over the beds of limestone, as they are clearly visible on the southern wall of the cavity that surrounds the Sphinx, are on the blocks used for the shell of the temple of the Sphinx, neighbor geographically and architecturally very near Temple Valley Chefren. However, the origin of the Sphinx is called into question in recent years, particularly by Egyptologist Rainer Stadelmann, which, containing a thesis oldest, sees the work of the pharaoh Cheops. Based on archaeological and stylistic analysis, it demonstrates that the shape of hairdressing (nemesis), lack of beard at the time of construction, the presence of the Sphinx in a career of Cheops and features face are characteristic of the reign of the latter.
Estimate Climate
In 1990, a team of four scientists, including geophysicist Thomas L. Dobecki and geologist Robert Schoch of the Boston University have shown that traces of erosion on the Sphinx are more important than those of surrounding monuments such as pyramids. It would, in addition to traces of erosion by sand, traces of erosion by the weather. However, climatologists think that the last period of heavy rainfall were recorded in the Sahara would be between -12000 / -3400. This would give a date of construction of several millennia prior to that advanced by Egyptologists.
Silting and degradation
The time has seriously damaged the great Sphinx, especially because of erosion caused by sand pile