Inca stone walls

[2big bronco]

Obviously carved with a crude chisel and hammer

 

[subybaja]

Obviously carved with a crude chisel and hammer

Ancient Egyptian Copper Slabbing Saws

 

[bdkw1]

Ancient Egyptian Copper Slabbing Saws

I will make a copper saw if you want to try and cut a Boulder in half.

 

[subybaja]

I will make a copper saw if you want to try and cut a Boulder in half.

Read the link. Plenty of examples from history.

 

[bdkw1]

Read the link. Plenty of examples from history.

I want to see someone do it. Not just a little cut, big old slab. Shit, I'll even throw in some tin and make it bronze. Copper VS granite is a joke. Even sandstone would wear it down quickly. You should see what happens to the steel body of a core drill when the diamond coating exits the chat.

 

[east_beast]

I want to see someone do it. Not just a little cut, big old slab. Shit, I'll even throw in some tin and make it bronze. Copper VS granite is a joke. Even sandstone would wear it down quickly. You should see what happens to the steel body of a core drill when the diamond coating exits the chat.

Every time we've seen some archaeologist try to demonstrate how they hypothesize these things were built they spend several days putting a dimple in a rock and then proudly proclaim how this is proof of concept of their hypothesis. Like buddy... you proved something alright but I don't think it was what you were shooting for.

 

[subybaja]

Copper VS granite is a joke.

If only someone would link an explanation of that issue.

However, the problem with the use of quartz as cutting teeth is that the quartz teeth will also abrade as the rock is cut, if the material being cut is of equal hardness, rounding off the sharp edges and reducing their effectiveness as an abrasive. When used for rocks that contain quartz, the teeth would need to be of minerals that were harder than quartz in order to be an effective method of cutting rock, as originally pointed out by Petrie (1883). However, the brittle nature of many of these harder minerals still means that over time the sharp edges will wear off due to the stresses imposed on the cutting surface of the teeth during abrasion, again reducing their effectiveness as an abrasive. Zuber (1956) rules out the used of flint shards embedded into a metal frame as a method of sawing rocks by the ancient Egyptians. It is unlikely that the ancient Egyptians had a ready source of mineral abrasives with hardnesses greater than that of quartz (Lucas and Harris 1962). The most likely abrasive is loose quartz sand, with its ease in replacing worn abrasive grains, as the material used for cutting rocks for most of the ancient Egyptian’s history. An example of a 4th Dynasty basalt fragment can be found at The Petrie Museum, in which the saw cut still contains rock tailings and sand (UC16033).

Every time we've seen some archaeologist try to demonstrate how they hypothesize these things were built they spend several days putting a dimple in a rock and then proudly proclaim how this is proof of concept of their hypothesis. Like buddy... you proved something alright but I don't think it was what you were shooting for.

Start with a lump of iron ore and show me how steel drillbits work. Scientists are proving a concept, not scaling up to industrial use.

 

[east_beast]

Start with a lump of iron ore and show me how steel drillbits work. Scientists are proving a concept, not scaling up to industrial use.

Your analogy doesn't work when you're arguing that these civilizations were using very simple technology.

 

[subybaja]

Your analogy doesn't work when you're arguing that these civilizations were using very simple technology.

Refining steel isn't very much harder than bronze, when you know about it. My point was, you don't have to build an automotive plant to demonstrate how drillbits work, which you keep suggesting. "Yeah, they made cuts in rocks, and there are identical cuts in Giza rocks, but there are LOTS of Giza rocks, so that can't be it."

Scientists are proving a concept

Speaking of...I hear a lot of "can't". What's your explanation? "We don't know, it's just a mystery!"?

So, explain away. Acid, aliens, Atlantis...surely something with actual evidence (like copper saw fragments found in quarries).

3rd Dyn (roughly notched) copper saw fragment, Meidum - Tools and weapons, Petrie 1917, S2 - (AWDL

 

[bdkw1]

Start with a lump of iron ore and show me how steel drillbits work. Scientists are proving a concept, not scaling up to industrial use

So you're saying they had giant factories and machines we still haven't found yet?

Which I would lean towards. I think they were cut with something much better than copper. By machinery, not by hand. I also think this stuff is a lot older than most claim.

 

[subybaja]

So you're saying they had giant factories and machines we still haven't found yet?

Which I would lean towards. I think they were cut with something much better than copper. By machinery, not by hand. I also think this stuff is a lot older than most claim.

No, I'm saying they had thousands of craftsmen spending years on a national project.

What evidence do you have for advanced tech? Cuts in rock that other civilizations are documented to have done with bronze-age tools?

Hand powered slabbing saws used for cutting rock were also known in other ancient civilizations. The Chinese used bow-saws with coiled bronze wire blades (Fig. 6a) for working jade (Long 1976), along with other tools, such as the partial rotary mud-saw (Fig. 6b). These types of lapidary saws are believed to have first appeared in China about 1900-1600 BC (Till and Swart 1986).

Fig. 6 a) Chinese hand-powered bow-saw for the slabing of jade (after Long 1976)

Fig. 6. b) Chinese partial rotary mud-saw (after Sinkankas 1984).

I'd be fascinated to see evidence of ancient high-tech. It seems really weird to me also that it's only happened once in 70K years. But we leave evidence- ceramics, imprints of products, alterations in the distribution of refined elements, alterations in isotope makeups across the globe...all things that are not in evidence from prehistory. Show me the evidence.

 

[ExWrench]

Those weren't production cuts





That's just where they were calibrating the cutting laser

 

[Pocahontas]

No, I'm saying they had thousands of craftsmen spending years on a national project.

The only problem with that is if it takes twice as long to cut, quarry, polish and set the stones that means you need twice the population or twice the time. If it takes 80-120 years instead of the 35-40 that opens you up to all sorts of environmental and population pressures, famine, drought, disease, war, political instability ect. If you go for the double the workforce you open yourself up to all those pressures to the nth degree if you’re bending your population and means of production that far.

I'd be fascinated to see evidence of ancient high-tech. It seems really weird to me also that it's only happened once in 70K years. But we leave evidence- ceramics, imprints of products, alterations in the distribution of refined elements, alterations in isotope makeups across the globe...all things that are not in evidence from prehistory. Show me the evidence.

I think we are definitely missing a lot that they could do, definitely a loss of technology after the fall of the Roman Empire so I don’t see why there shouldn’t have been a loss of technology after the old kingdom to the new kingdom(2000-2700bc).

To explain why we don’t have any evidence it’s been a hell of a long time, anything of value most likely was repurposed just like the casing stones on the pyramids as well as a bunch of other Roman era structures. Sea levels have risen by approximately 30 feet since then and the saraha was a much more lush place so you could have had industrial places in either of the locations and after everything of usefulness or value was long ago carted away nothing is left to see.

Here’s a “road” from the same era of the pyramid made from petrified wood.

Sea level rise since in last 8k years.

 

[Pocahontas]

 

[Mikel]