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Author Topic:   The dating game
Reserve
Junior Member (Idle past 6179 days)
Posts: 26
Joined: 03-29-2007


Message 1 of 2 (392453)
03-31-2007 2:11 PM


Hello everyone,
I am new here, however I have read quite a few posts so I am familiar with some of the material. I have a few question that attacks dating negatively.
I have read else where but this link will suffice. It says that Potasium-argon does not work for recent dates. I wonder, why not? why only for ages older than 100kya? Radioactivity is a recently discovered tool from around the 19th century which is about 200 years ago.
So the question is, why can we know the half life of this method in such a short period of time, and not able to use it on anything under the age of 100kya? If we can know the accuracy of the half life within 200 years, we should be able to use it on anything that is 200 years or older.
Potasium-argon does not work for recent dates. It works between about 4.3 bya and 100kya
quote by John at this link, message 4
EvC Forum: Feedback about reliability of dating
A similar question for radiocarbon dating. If radiocarbon dating is only useful for a maximum date of 100,000 why is it that when dating anything older we would get "back nonsense numbers"? Since the method (Mass spectrometer) counts the atoms, then older objects should give back very low parent atoms. However if we date supposedly older objects and we can count the parent atoms within error, then this tells us that there is an extremely big amount of contamination, or the date of the object is below 100,000 years depending on the ratio.
Radio carbon dating is good for, at the extremes, up to about 50,000 years. Any use of it to date anything suspected to be older will produce a date of about that. It would be stupid to use a measuring tool that is only 50 units long to attempt to measure 100,000 unit long thing.
The physics demands that this be the limit. Up to that limit C14 dating has been well calibrated with various independent approaches.
If one were stupid enough, or dishonest enough, to submit samples of suspected great age for C14 dating one would get back nonsense numbers
qouted by Nosy Ned at this link, message 3
EvC Forum: Does radio-carbon dating disprove evolution?
Here NosyNed says "suspected great age", however that would be from an evolutionary perspective, from a creationist perspective, why not date objects subjected to the carbon cycle at some point in time and measure their age using radiocarbon?
Edited by Reserve, : wrong word used
Edited by Adminnemooseus, : Made links message specific.

AdminNosy
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Posts: 4754
From: Vancouver, BC, Canada
Joined: 11-11-2003


Message 2 of 2 (392614)
04-01-2007 3:27 PM


Thread copied to the The dating game thread in the Dates and Dating forum, this copy of the thread has been closed.

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