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originally posted by: aorAki
a reply to: Harte
Surely, though, large blocks of granite would require more than pounders to detach them from the quarry walls?
I'm not sold on this.
Pounders may work AFTER detachment, but given the qualities of granite, to detach blocks would involve more than pounders???
Actually, to detach blocks cohesively would require so0mething other than pounders, from my observations as a humble geologist...
C'mon, I'm usually on your side, but this makes no sense. There's obviously more than pounders at play in the quarrying of these rocks.
Wedges anyone?
originally posted by: username74
a reply to: Harte
welll.. i would hate to try and think of a different source for those marks, i ll give you that. what i mean is someone has smoothed down the sides with a dolly boulder.who knows why especially if it was done later, but if you try and dig into bed rock , especially granite you will break it your rock. your boulder, will work on rough surface because the little bits of rock are exposed on two to four sides and the top which means it can be crushed. because thats all these rocks do to softer rock as well. and furthermore i only see these marks in egypt and the andes. you cant be suggesting they were quarrying like this. if so why nowhere else. apart from the obvious reason its an insane thing to do. so to follow if nowhere else what were they doing in these select areas in two seperate continents.
the dolerite quarries for stonehenge. they were suprised there was no mauls.
another point, maybe its not a factor but this suggested labour would destroy a human body, very very quickly.
under examination the remains of carpenters from the first settlers to the u s showed that by the age of 30 these guys were finished. and i mean shot to peices. i cant imagine you would last three months under the repeated impact. this is one of the less considered reasons why tools have handles. to soak up the shock. disabled in three months i reckon. massive tendon damage and so much more. imagine the toothache
originally posted by: username74
a reply to: Harte
hmm. ok so
No reason to presume no handles on the balls. - byrd said this is in fact the case, and i dont doubt it, but not for that job. on that granite. in that trench. why have a handle when you havent got room to swing. no.
i think the boulders and and the marks they leave are definitely as was proposed . they were were used by hand( in this instance) relying largely on the mass of the rock and a little downward force producing the scalloping effect (accurate description)
but not all the mass can be removed like that.
and we havent really touched on these
dolerite contains Pyroxene a hard silicate mineral with a hardness of 5 to 6.5 on the Moh scale. Slightly less hard than quartz and granite at 7 on the scale
as you pointed its the smashing of the crystalline structure that erodes (more appropriate than removes) the granite. this will be the feldspar (think thats around 5 on mohs scale) and the other constituents are quartz and mica. red quartzite , for example kills dolerite.
and what do we reckon the volume of the removed rock is? about the same? 1 000 000 kg of finely powdered granite. broken out of its dense structure so maybe twice three times its original volume. and then what, the same or more of dolerite. where is all the slag.
mortar. i reckon they were making fine dust for a geopolymer like cement. bets that why the marks are on the quarry wall. and the obelisk would be a perfect site for that, collects in the bottom.
so i know that boulders work to a small degree, i am going to have to find the book again to give you a figure of the volume removed, but i reckon granite/dolerite dust mixed with crushed burned then powdered limestone would make exellent fine mortar, however having said all this i am not sure if they used mortar
originally posted by: username74
a reply to: Harte
"I mean, for example, limestone has the same hardness as sandstone, yet sandstone is far easier to carve than limestone."
and neither of them are granite
did they use mortar?
what about the other 150 questions ive asked you in the past week?
"The "slag" from these operations could be swept out by other workers as the work was being done"
seriously?
originally posted by: username74
a reply to: Harte
ah, there you are, harte
i was thinking about copying and pasting them into a post but then i thought that was maybe a little cheap and scrappy so i was thinking that i should reorganise because as you can probably tell some of this conjecture came off the cuff such as what happens to all the removed mass (the vision came unbidden, of the walrus and the carpenter, at the mention of the sweepers but i was only really imagining more men in the hole)
i ll copy and paste the scraps for now and i will get back to it more coherently
you know how it is when you start getting amongst something
this site keeps me from my bed at times
originally posted by: username74
a reply to: Harte
theres some initial contentions as well as questions so i ll chuck those in too and revise it later
did they use mortar?
originally posted by: username74dolerite contains Pyroxene a hard silicate mineral with a hardness of 5 to 6.5 on the Moh scale. Slightly less hard than quartz and granite at 7 on the scale
originally posted by: username74and what do we reckon the volume of the removed rock is? about the same? 1 000 000 kg of finely powdered granite. broken out of its dense structure so maybe twice three times its original volume. and then what, the same or more of dolerite.
originally posted by: username74as you pointed its the smashing of the crystalline structure that erodes (more appropriate than removes) the granite. this will be the feldspar (think thats around 5 on mohs scale) and the other constituents are quartz and mica. red quartzite , for example kills dolerite.
i reckon they were making fine dust for a geopolymer like cement. bets that why the marks are on the quarry wall
( for glue not mass like concrete) (see first question)
originally posted by: username74When you look at the unfinished obelisk, you see the marks left by the pounders even up underneath the bottom edges.
There are several theories about how they did the final detachment. But it wasn't pounding, obviously.
Rock dust tends to disappear into the desert on it's own, see.
sawing rock in not and never was a quarrying technique. splitting is
no one in pre history would be daft enough to quarry rocks like that. takes a modern academic to come up with something that far from reality and reason. they werent cutting down trees with wood were they
what was going on in those quarries? theres lot of things you would expect to see and then there are areas that make no sense
originally posted by: username74Fires directly over the area to be removed/pounded out will not harm the rest of the stone.
But you do have to control it.
It's possible that this is what cracked the unfinished obelisk.
the dolerite quarries for stonehenge. they were suprised there was no mauls.
originally posted by: username74maybe its not a factor but this suggested labour would destroy a human body, very very quickly.
under examination the remains of carpenters from the first settlers to the u s showed that by the age of 30 these guys were finished. and i mean shot to peices. i cant imagine you would last three months under the repeated impact. this is one of the less considered reasons why tools have handles. to soak up the shock. disabled in three months i reckon. massive tendon damage and so much more. imagine the toothache
i only see these marks in egypt and the andes
. if so why nowhere else. apart from the obvious reason its an insane thing to do. so to follow if nowhere else what were they doing in these select areas in two seperate continents.
originally posted by: username74
a reply to: Harte
The AEs used mortar profusely, if that's what you mean.
genuine question, i have a bit of a backlog to my reading list since i started this posting game