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originally posted by: JamesChessman
Well carbon dating is supposedly respected as accurate, for dating organic matter, but it doesn't really apply to non-organic things like stone, which basically leaves me doubtful that anyone can accurately date ancient pyramids or ancient Younger Dryas Impact sites...
Are you still reading the Vedas or did the interest run out when you established that the timeline is lost?
I didn't establish any thing, and I haven't started reading it yet, I am preparing the text so I can have a nice, well formatted text I can read on my small tablet. Maybe a side-effect of having done some volunteer work for the Project Gutenberg.
originally posted by: JamesChessman
Alright well good info, but it's been my general impression over the years that if anything is accurate at all, carbon dating has the best chance of that, whereas everything else seems less promising of accuracy. I think that's even the mainstream acknowledgment.
Are you going to skim for the best parts?
Also why exactly are you interested in reading that, just from this thread? And just the general ideas of ancient advanced civilizations and aliens, war, etc.?
originally posted by: ArMaP
originally posted by: JamesChessman
Alright well good info, but it's been my general impression over the years that if anything is accurate at all, carbon dating has the best chance of that, whereas everything else seems less promising of accuracy. I think that's even the mainstream acknowledgment.
Maybe, maybe not, and does it really make a difference?
If we are talking about a 10% margin error to date something as 10000 years old that would mean a range from 11000 to 9000. On that Wikipedia article they talk about methods with an error margin of 1.5" to 2%, which would mean a range from 9800 to 10800 years, not much relevant.
Are you going to skim for the best parts?
I intend to read it all, to get a better idea of what it says. Skimming could give me the wrong idea.
Also why exactly are you interested in reading that, just from this thread? And just the general ideas of ancient advanced civilizations and aliens, war, etc.?
I love to read, I am always reading some book, so why not read this one?
Maybe, maybe not, and does it really make a difference?
If we are talking about a 10% margin error to date something as 10000 years old that would mean a range from 11000 to 9000. On that Wikipedia article they talk about methods with an error margin of 1.5" to 2%, which would mean a range from 9800 to 10800 years, not much relevant.
originally posted by: JamesChessman
The basic premise makes sense, of somehow measuring the traces of decayed life-forms.
I've read / seen complications and possible misinterpretations of attempting to date rocks because, for example, the Egypt pyramids made of limestone, it's stone made of VERY ANCIENT stuff, like billions of years old sand and shells etc. but obviously the actual pyramid stones were built sometime in the last few thousand years.
In the case of the pyramids they have writings that talk about the building of the pyramids and those writings can be indirectly dated because they also talk about other events that can be dated or directly by C14.
originally posted by: ArMaP
a reply to: JamesChessman
Sorry, bad wording from me, what I meant by "talk about the building of the pyramids" was supposed to say exactly that, they talk about it, they do not explain how they were doing it.
Radiocarbon dating
Mortar was used generously in the Great Pyramid's construction. In the mixing process ashes from fires were added to the mortar, organic material that could be extracted and radiocarbon dated. A total of 46 samples of the mortar were taken in 1984 and 1995, making sure they were clearly inherent to the original structure and could not have been incorporated at a later date. The results were calibrated to 2871–2604 BC. The old wood problem is thought to be mainly responsible for the 100–300 year offset, since the age of the organic material was determined, not when it was last used. A reanalysis of the data gave a completion date for the pyramid between 2620 and 2484 BC, based on the younger samples.
In 1872 Waynman Dixon opened the lower pair of "Air-Shafts", previously closed at both ends, by chiseling holes into the walls of the Queen's Chamber. One of the objects found within was a cedar plank, which came into possession of James Grant, a friend of Dixon. After inheritance it was donated to the Museum of Aberdeen in 1946, however it had broken into pieces and was filed incorrectly. Lost in the vast museum collection, it was only rediscovered in 2020, when it was radiocarbon dated to 3341–3094 BC. Being over 500 years older than Khufu's chronological age, Abeer Eladany suggests that the wood originated from the center of a long-lived tree or had been recycled for many years prior to being deposited in the pyramid.
originally posted by: JamesChessman
Well re: Mortar: I don't think we can really know for sure... if it was part of the original pyramid, or not.
So the info sounds convincing except maybe the mortar was simply added at a later, unrelated time (which was how I had always heard about that mortar described, and I thought there was NO mortar in the actual original structure!). So that's an open question for me, at least, right now.
Why in the world is the wood dated 500 yrs before Khufu, well then it must have been a special piece of wood that they passed on for 500 years... well but it's really NOT a special thing. It's simply a small chunk of wood AFAIK, I've looked at its pictures in the past IIRC, it's just a rough, natural splintered chunk.
I had always heard / seen the explanation that the wood probably came from old-time explorers, who were trying to stick wood into holes in the rock, and attempt to measure it. And a piece must have broken off.
^The explanation seems to make sense for... why there's a small chunk of broken, splintered wood, found inside.
(And it's such a naturalistic chunk that it's extremely doubtful to imagine it was actually a special thing that was passed on for 500 years. It's not carved, it's not a STATUE lol, it's not carved with a message. It's a natural chunk of wood.)
I find it absurd to consider it a special heirloom artifact that was passed-down for 500 yrs and then sealed in the pyramid, that's ridiculous.
^So that's the best explanation of why the wood is there, but then that breaks all these dating estimates.
...So really the take-away is that ALL the dating of EVERYTHING is probably just garbage.
Being over 500 years older than Khufu's chronological age, Abeer Eladany suggests that the wood originated from the center of a long-lived tree or had been recycled for many years prior to being deposited in the pyramid.
Egyptians used measuring sticks, no need to imagine "old-time explorers" to explain the presence of a piece of wood.
Only if you ignore that part that says "making sure they were clearly inherent to the original structure and could not have been incorporated at a later date".
originally posted by: ArMaP
originally posted by: JamesChessman
The basic premise makes sense, of somehow measuring the traces of decayed life-forms.
What they measure is the amount of C14 still active.
Any living creature that is part of the carbon cycle has some C14 in them, and when they die they stop gathering C14, so what they do is measure the amount of radioactive C14 and compare it to the amount that would exist if it was alive. Knowing how much is left and the rate of decay of C14 they know how many years have passed since the death of that living creature.
They use the same method for rocks, so they can date the rocks in the ground and know how old the rocks and/or the ground is in a specific place.
I've read / seen complications and possible misinterpretations of attempting to date rocks because, for example, the Egypt pyramids made of limestone, it's stone made of VERY ANCIENT stuff, like billions of years old sand and shells etc. but obviously the actual pyramid stones were built sometime in the last few thousand years.
You're right, it's not possible to use any direct method to know how long ago something was made, for that they have to use indirect methods.
In the case of the pyramids they have writings that talk about the building of the pyramids and those writings can be indirectly dated because they also talk about other events that can be dated or directly by C14.
For civilizations or locations for which there aren't any other dating methods they can only use indirect methods.
originally posted by: JamesChessman
a reply to: ArMaP
Only if you ignore that part that says "making sure they were clearly inherent to the original structure and could not have been incorporated at a later date".
^Well I'll have to look into it, I didn't realize there was mortar used when the pyramid was originally built. But I could be thinking of a different ancient site...
originally posted by: JamesChessman
It was your information that you just posted, it said the wood is dated older than the pyramid, like 500 yrs...
originally posted by: JamesChessman
I lost clarity of whether you're saying if rocks & rock structures, are directly dated, or not. Your post kinda sounds like you're 1st saying that rocks do get dated, and then it sounds like ur saying that they don't get dated.