farmerman wrote:I just pointed out that you made the ORNL story "UP"
How stupid do you think I am? Do you think I would randomly make something up to support myself? I quoted my source, who was apparently incorrect, and I admitted that I was wrong. Can you please have the decency not to make unfounded accusations.
farmerman wrote:I guess I have no idea where you got this from, could you supply me with the source.
I did not mention the source because everything I quoted came directly from my last post where I did source them. I was requoting them in point form to make it more accessible to you to respond to, seeing as you didn't respond to them when I last posted them.
I know that you don't like it when I use quotes, but it is really much quicker. I only select quotes which either say what I want to say, or that contain interesting things that I come across and am curious about. I am sorry but I will continue to use quotes because it saves time and is practical. The source that I am using for quotes from this time is:
http://www.answersingenesis.org/docs2002/carbon_dating.asp . It's quite an interesting article, I encourage you to read it.
farmerman wrote:
Quote:
2. How can you determine how much carbon-14 is left in matter when you do not know how much was present in the atmosphere to start with, or how long it has been increasing and decreasing.
Dont need to know anything of the sort. The math of radionuclide decay is simple and robust its an exponential decay series. All we need to know is an accurate amount of isotope is present now.
That's all very well, but the amount of isotope present is not the same as a date. See the following:
Quote:The isotope concentrations can be measured very accurately, but isotope concentrations are not dates. To derive ages from such measurements, unprovable assumptions have to be made such as:
1. The starting conditions are known (for example, that there was no daughter isotope present at the start, or that we know how much was there).
2. Decay rates have always been constant.
3. Systems were closed or isolated so that no parent or daughter isotopes were lost or added.
farmerman wrote:We know that the ratio of C14 to C12 C13 is fairly constant
Do you take the following into account in your calculations?
farmerman wrote:In MAZOR 91 "Applied Isotopic ground water Hydrology" theres a good discussion of isotopic calibration of C14 in recent times when atmospheric testing had artificially increased the C14 incorporated in plant tissue
I tried but could not find it online, so I am not sure what it covers. I did come across this in relation to C14 in plant tissue. I would be interested to hear your comments.
Quote:plants discriminate against carbon dioxide containing 14C. That is, they take up less than would be expected and so they test older than they really are. Furthermore, different types of plants discriminate differently. This also has to be corrected for.
Here are some more interesting things that I came across. I am sorry once again that they are in quote form, which you do not seem to like, but I really couldn't be bothered regurtitating it in my own words. Sorry, but please I would interested to hear what you have to say.
Quote:The strength of the earth's magnetic field affects the amount of cosmic rays entering the atmosphere. A stronger magnetic field deflects more cosmic rays away from the earth. Overall, the energy of the earth's magnetic field has been decreasing,5 so more 14C is being produced now than in the past. This will make old things look older than they really are
Quote:Laboratories that measure 14C would like a source of organic material with zero 14C to use as a blank to check that their lab procedures do not add 14C. Coal is an obvious candidate because the youngest coal is supposed to be millions of years old, and most of it is supposed to be tens or hundreds of millions of years old. Such old coal should be devoid of 14C. It isn't. No source of coal has been found that completely lacks 14C
farmerman wrote:We inject "known' values into the machine at low levels to establish calibration curves and from these we run our unknowns
What are these known values? And how do they become known? Are they just dated by other radiometric processes?
Lastly, this quote sums up my position nicely,