Geologist Robert M. Schoch argues that long-term rainwater runoff created the gully-like weathering on the Great Sphinx’s enclosure walls. The video cites his estimate of roughly 10–20 inches (250–500 mm) of annual rainfall, compared with about 1 inch (25 mm) at Giza today, and interprets the quarry depression as a catch basin for seasonal rain. It says those conditions point to a wetter period in which the Sphinx was carved. The broader water-erosion argument—and any implication that the Sphinx predates the accepted Old Kingdom dating—is a fringe hypothesis, not a settled finding of mainstream Egyptology or geology.
Video presents Schoch’s wetter-climate theory for Sphinx erosion
EgyptTheory
Key facts
- Robert M. Schoch interprets the uneven weathering of the Sphinx enclosure walls as evidence of long-term rainwater runoff.
- The video cites an annual-rainfall estimate of roughly 10–20 inches (250–500 mm), versus about 1 inch (25 mm) at Giza today.
- The video interprets the excavated quarry depression as a catch basin for seasonal rain and says this points to a wetter period for the Sphinx’s construction.
- The water-erosion inference, including any implication that the Sphinx is older than the accepted Old Kingdom chronology, remains a fringe hypothesis contested in mainstream Egyptology and geology.
- Wind abrasion is a proposed contributor to Sphinx surface erosion, but the supplied results do not support the separate claim about granite-and-basalt repairs to pyramid structures.
Sources
The Sphinx Controversy: Another Look at the Geological Evidencehallofmaat.com
Dr. Schoch interprets seismic profiles made on all sides of the Sphinx as indicating that a zone of weathered limestone exists below the floor of the enclosure ...
The Great Sphinx - Robert M. Schochrobertschoch.com
A moat theory explains the water weathering of the Sphinx without hypothesizing that it dates back to an earlier period of more rainfall than the present.
Did natural erosion help carve Egypt's Great Sphinx? - Physics Worldphysicsworld.com
Much of the body of Egypt's Great Sphinx could have been created by the natural erosion of a rock formation, according to researchers at New York University.
Videos - How the great pyramids were built using watersecretofthepyramids.com
Again, the implication is that rainfall is the culprit responsible for the erosion of the Sphinx enclosure walls. No, a stubborn rain cloud didn't take ...
The Great Sphinx Erosion Debate: Rain or Sand? - The Archaeologistthearchaeologist.org
Proponents of the water erosion theory argue that the Sphinx's erosion patterns were caused by prolonged exposure to heavy rainfall, suggesting ...
Erosion May Have Played A Role In Shaping The Great ...forbes.com
... wind moving against once-shapeless mounds of clay, a new study suggests that erosion played a role in first sculpting the Great Sphinx of Giza.
Sphinx water erosion hypothesisen.wikipedia.org
The Sphinx water erosion hypothesis is a fringe claim, contending that the Great Sphinx of Giza and its enclosing walls show erosion consistent with ...
The Great Sphinx of Egypt: Nature's Shabby-Chic Trick?geoexpro.com
The rock matrix has experienced variable degrees of dissolution of the cementation between the limestone grains, which resulted in later erosion ...
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