Common Tools or Ancient Advanced Technology? How Did the Egyptians Bore Through Granite?

Common Tools or Ancient Advanced Technology? How Did the Egyptians Bore Through Granite?

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Ancient Egypt is known for many technological and artistic achievements, constructing pyramids and temples, inventing a system of writing, hieroglyphs, and making advancements in medicine, astronomy, and many other fields. One area for which the Egyptians are particularly famous, of course, is their stone working. A particularly controversial issue is how the ancient Egyptians were able to cut and bore through solid granite - which is considerably more difficult to do than cutting through softer, sedimentary rock such as limestone or sandstone.

View One: The Egyptians Used Common Tools to Bore Holes in Granite

The mainstream archaeological view is that it was done with copper, bronze, and wooden tools used by Egyptian masons today to cut granite. Others, however, have suggested that it was done with more advanced equipment that is yet to be discovered. For the time being, the balance of evidence seems to suggest the mainstream view that primitive metal and wooden tools used by common stone masons were sufficient for cutting through granite.

Reproduction Ancient Egyptian stone mason’s tools used for carving demonstrations.

Reproduction Ancient Egyptian stone mason’s tools used for carving demonstrations. (St. Luke's Finsbury/ Stephen Critchley ) Were primitive metal and wooden tools used by common stone masons sufficient for cutting through granite?

The first modern Western archaeologists to study ancient Egypt in the 19th century were mostly upper class gentlemen who had no experience with manual labor. As a result, when they encountered structures which they didn’t think could be built with simple hammers and chisels, they assumed that it must have meant that the people at the time had access to more advanced tools than previously believed, advanced machinery with which they were more familiar - such as cranes and other industrial machinery.

Later archaeologists decided to examine the work of stone masons to better understand how the ancient Egyptians built things. They realized that contemporary Egyptian masons of the day had been using primitive tools such as hammers, copper and bronze chisels, and wooden wedges to cut through granite for centuries, dating back to pharaonic Egypt.

Ancient Egyptian sculptors making a statue.

Ancient Egyptian sculptors making a statue. ( Underground Science ) The mainstream view suggests ancient Egyptian stone masons used common tools to crave and bore holes in granite.

The current understanding of how Egyptians bored through granite among mainstream archaeologists is that they used a method where they would drive a wooden wedge into a crack in the rock and soak the wedge with water. As the water expanded, this would cause the crack in the rock to widen. After doing this, they would continue to drive the wedge in even further. Doing this repeatedly would eventually split the rock into blocks. This process happens all the time in nature through frost wedging. Water in the cracks of rocks, including granite and other igneous rocks, will freeze. Freezing of the water causes it to expand, which, over successive freezing and melting, will cause a crack to widen. This can sometimes cause an entire boulder to split in two. The stone mason, modern or ancient, would be using the same principle to cut granite blocks along pre-existing zones of weakness.

An unfinished Egyptian obelisk at Aswan with holes showing how the granite would be split.

An unfinished Egyptian obelisk at Aswan with holes showing how the granite would be split. (Glenn Ashton/ CC BY SA 3.0 )

View Two: The Egyptians Used Advanced Technology to Bore Holes in Granite

This is still hard for some skeptical writers and observers to believe. They insist that the primitive methods used by early modern and ancient Egyptian stone masons were not enough and that it must have been with more advanced equipment that the ancient Egyptians bored through solid granite.  They argue that this is evidence that the ancient Egyptians and other civilizations were much more technologically sophisticated than is currently believed.

While it is possible that more advanced technologies could have been developed by earlier civilizations then anticipated, there does not appear to be much reliable evidence to support this idea. If the ancient Egyptians did cut through granite with equipment such as electric drills or lasers or similarly advanced technology, these hewn granite slabs are the only evidence for it that we have. So far, there is no indisputable evidence of physical remains of electrical batteries or wires or anything else that would suggest that the ancient Egyptians used technology that was more advanced than what is expected for that period.

Abusir, Egypt. Remnant of granite pillar with lines etched on it.

Abusir, Egypt. Remnant of granite pillar with lines etched on it. Photo Stephen S. Mehler, MA . 2007.

Comments

I think they would take a copper chisel of various widths, and slowly rotate it on the granite to drill the desired sized hole, the chisel would may or may Not have a strait across flat edge, The wooden made for this technique, would be the same width as the copper chisel blade, so as blade went in, the wooden handle would act as a guide so the chisel would go, Strait through. They would spin this assembly with both hands, thus making it act like a drill. They would also then obviously lengthen the wooden handle to continue the hole depth as deep as they needed to go. I will go on to say they would remove the loose bits every inch they went, they would probably have to roll over the granite stone so the bits could fall out as they had no other way to draw them out.. Very unlike a drill bit we use today.. My more real wonder is how they probably used math, to help guide their carving of those narrow square shaped air shafts through the pyramid blocks. A Long way..
They most likely carved the shaft in sections on the blocks involved before they set the blocks in place, then they would have to line up perfectly, but, the egyptians were perfectionists too !
My complaint here is How could the egyptians use ICE, to freeze granite to crack it ? Where oh where they get ice from ? At night when desert gets freezing cold ? did it get freezing cold ??
Also: There is possibility they may have used molten metal to pour in the cracks they made, thus the hot liquid would crack the granite...?

Ice was only an example of a natural expansion process to illustrate how soaking wooden wedges would achieve the same result. Working a make shift drill you described can bore a hole and debris would be best removed with the block at an angle. Problem is, if you look close at tha hole in top photo, there are lines ingraved as if it is threaded. The lines are only a mil or two apart and the same depth n spacing the entire length, there is a core also matching this. Question is how such precise work be done with out diamonds, something which has never been found there. I say burden of proof is on those who think it could be done using copper!

Thank you

Seems like a no Brainer for me ...If I can figure it out in my grade 11 drop out brain surely an Egyptian
construction engineer could do it ....One method would be to use a grit of at least equal hardness ...
To bore threw Granite all they had to do was to use Granite grit ...

I believe before 12,000 BC man used a different technology than we use today. We worship the electron they did something else. The megalith's around the world seem to show that. Can we today cut and move 100 ton block's. Build a pyramid?

Tsurugi's picture

The problem is the penetration rate evident on drill cores found in Egypt. This article discusses splitting rock, which is completely different from shaping or drilling. Yes, a wooden wedge and some water will help you split a granite boulder, but it won't help you shape that boulder into an ashlar with sharp corners and flat faces, and it won't help you carve hieroglyphs half an inch deep into the sides of a granite obelisk, and it won't help you drill a four-inch bore into granite with an apparent penetration rate of two or three millimeters per rotation.
This article also doesn't discuss the cut marks in basalt flagstone slabs on the Giza plateau that are obviously the result of cutting too deeply when cutting something else that was sitting on the flagstones. It is hard to believe that someone cutting manually with rope and sand accidentally cut many inches deep into basalt.

There are plenty of other examples, which this article does not address at all. It is absolutely false to say these questions are all answered adequately by primitive tool techniques.

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