Radiocarbon dates from charcoal in Khufu's gypsum mortar include results older than the accepted construction date. A September/October 1999 Archaeology Magazine article—not a 2014 study—reported that 65% of 46 samples dated before 2700 BC, with the oldest at about 3705 BC. They date charcoal, not automatically the mortar or pyramid: old wood burned to prepare mortar can produce such dates, and contamination and sampling remain debated.
Gypsum mortar is documented in the original pyramid masonry. It bedded the blocks rather than forming the main load-bearing structure; its relative weakness and water sensitivity do not make it repair-only. The video argues that the dates show repeated repairs by dynastic Egyptians, but that is the presenter's interpretation, not an established finding. The claim that the builders knew geopolymer concrete is unsupported. Mainstream archaeology dates Khufu's pyramid to his reign, around 2600 BC.
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The Great Pyramid of Giza could be thousands of years older than ...ecoticias.comA project reported in the journal Archaeology used small bits of charcoal and other organic material trapped in the mortar of several pyramids ...
Dating Ancient Mortar | American Scientistamericanscientist.orgAlthough radiocarbon dating is usually applied to organic remains, recent work shows that it can also reveal the age of some inorganic building materials.
Dating the Pyramids - Archaeology Magazine Archivearchive.archaeology.orgOur radiocarbon dates from the site suggest that, like those from the pyramids, the dates on charcoal from the settlement scatter widely in time with many dates ...
The Curious Conflict Between Radiocarbon Dating and Early Egyptianarmstronginstitute.orgRadiocarbon dating originally and consistently provided centuries later dates for Egypt's earliest dynastic history, conventionally held as ...
How Old Are the Pyramids?|AERAaeraweb.orgIf a piece of wood was already centuries old when it was burned, radiocarbon dates of the resulting charcoal would be centuries older than the mortar for which ...
NOVA Online/Pyramids/How Old Are the Pyramids?pbs.orgI noticed that in the interstices between the stones and in this mortar was embedded organic material, like charcoal, probably from the fire that they used to ...
Microstructure of mortars from three Egyptian pyramidssciencedirect.comby M Regourd · 1988 · Cited by 50 — The mortar is still in evolution with a slow anhydrite-gypsum transformation and the exudation of halite due to the presence of humidity inside the pyramid.
Fact check: Joe Rogan on Archaeology, JRE #2321factcheckjoerogan.comRadiocarbon dating of the Great Pyramid did rely on organic material (ash and charcoal from fires used to prepare the gypsum mortar) that was ...
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