Posted: Tue Mar 28, 2006 8:33 am
Sorry for entering the discussion. I'm new to this forum so I beg your pardon if my post sounds weird. I'm just trying to understad which positions are around.
As far as I know the Hawaii test was conceived exactly as a test to show that K-Ar dating is unreliable on basaltic pillows (which forms underwater) due to the Ar melted in the sea water.
http://en.wikipedia.org/wiki/Basalt
http://adsabs.harvard.edu/cgi-bin/nph-b ... ML&format=
This is a known source of initial contamination which, since it is well known, has nothing to do with the rocks which are dated to 3.8 billion years (none of which of course is from a basaltic pillow).
Moreover, it is well known that the *absolute* error in the age is related to the *relative* contamination; in other word the usual about 3 million years of error in the age due to the initial contamination is present in the 200 years rocks (making the dating unreliable for these rocks) but it is still a 3 million years error on the rock dated to 3.8 billion years (in which case this error is completely irrelevant).
Finally, there are a dozen of different methods based on different elements each suggesting that the oldest rocks on Earth are at least about 3.8 billion years old.
Is there here someone who wants to suggest that contamination is a good explanation to show that all these independent methods are all mistaken and exactly by the contamination which is necessary to produce a 3.8 billion year error?
As to say that rocks contamination in Uranium, Strontium, Argon etc. are all fine-tuned to produce a wrong age of 3.8 billion years!
As far as I know the Hawaii test was conceived exactly as a test to show that K-Ar dating is unreliable on basaltic pillows (which forms underwater) due to the Ar melted in the sea water.
http://en.wikipedia.org/wiki/Basalt
http://adsabs.harvard.edu/cgi-bin/nph-b ... ML&format=
This is a known source of initial contamination which, since it is well known, has nothing to do with the rocks which are dated to 3.8 billion years (none of which of course is from a basaltic pillow).
Moreover, it is well known that the *absolute* error in the age is related to the *relative* contamination; in other word the usual about 3 million years of error in the age due to the initial contamination is present in the 200 years rocks (making the dating unreliable for these rocks) but it is still a 3 million years error on the rock dated to 3.8 billion years (in which case this error is completely irrelevant).
Finally, there are a dozen of different methods based on different elements each suggesting that the oldest rocks on Earth are at least about 3.8 billion years old.
Is there here someone who wants to suggest that contamination is a good explanation to show that all these independent methods are all mistaken and exactly by the contamination which is necessary to produce a 3.8 billion year error?
As to say that rocks contamination in Uranium, Strontium, Argon etc. are all fine-tuned to produce a wrong age of 3.8 billion years!