Graham4C said:
Also, an extract from an article:
More Hovindisms I see.
If we use the rocks to determine the age of the fossils, and the fossils to determine the age of the rocks, then how do we really know how old they are in the first place? This is called circular reasoning. The age is made up according to how scientists would like it to be and then they work from there. This is both deceitful and illogical.
But that is not what scientists do. Index fossils can be used for an initial estimate of the age of a rock, but the age of the rock is always determined independently of the fossils in it. All an index fossil will really do is tell you that the rock in location X is the same age as the rock in location Z. You have to determine the age of the rock in either X or Z to know how old the fossil is.
Ill use carbon dating as an example because it is the most widely known method.
Poor choice. Fossils are mineralized remains of organic material. A fossilized bone is not bone anymore; it is stone shaped like the bone.
And carbon dating cannot be used on minerals. It is only used on organic material that is still organic.
So carbon dating is rarely used on fossils, other than a few that are not completely fossilized yet.
The dating method works by comparing the amount in a dead animal to the amount in the atmosphere today.
Totally wrong. Carbon dating is not based on
amounts of c14, but on
proportions of c14 to c12. Nor is it based on what is in the atmosphere today, but on what was in the atmosphere at the time the organism died.
A mammoth was examined and its skin was found to be 24 000 years old while its bones were 14 000 years. Thats an error of 90% which is unacceptable in the world of science.
Another Hovind legend. They were actually two different mammoths.
In another case, a giant snail that had been dead for a few days was told to be over 100 000 years old! That is ridiculous. How can these figures be so far off track.
I wonder if it was a team of creationists who conducted this research.
In that case they deliberately ignored two things:
1. It is not possible to get a reliable measure of only a few days difference in c14 dating. The rate of c14 decay is too slow for that.
2. It is not possible to get a reliable measure from shelled animals, because the calcium carbonate in their shells has not come from the atmosphere. C14 is only good for measuring the date of carbon that originally came from the atmosphere.
So a scientific research team that ignores these facts is bound to come up with false results.
The second reason is because the radiation levels in the earths atmosphere have not reached equilibrium. Equilibrium means in balance. ...However, you cannot compare these amounts and get accurate results if the levels are not constant. ...
This is just sheer nonsense. Equilibrium is not needed. C14 ratios vary. But, as notto said, the c14 dating is calibrated against known dates to assure its accuracy. So you can indeed get accurate results even though the levels are not constant.
Also, how do you know the carbon 14 in a bone was formed inside it while it was fossilizing?
It wasn't. It was formed while the animal was still alive.
And the animal could have had all its carbon 14 in its stomach instead of in the bones. And lets ask what happens if the animal eats trees that just didnt receive their portion of solar radiation this year.
Questions that show the whole concept of c14 dating is misunderstood/misrepresented. Animal organisms take in atmospheric c14 by breathing, by eating living or very recently living plants or animals who also take in c14 through respiration. So both the animal and its food will have the same proportion of c14 in their systems, namely the proportion that is in the atmosphere from which the carbon came.
Blood circulation will take both carbon in the lungs, and carbon ingested by food to all parts of the body, so it is not possible for all its carbon 14 to be in its stomach.
Nor does it matter if trees didn't "receive their portion of solar radiation this year" (whatever that means), because it is not the amount of carbon received that matters, but the proportion of the carbon that is c14 instead of c12. Even if the trees are getting less carbon overall, the proportion is still measurable, and it is the proportion that is the base line for measuring the age of the dead tree.
How can we possibly say that the carbon dating results are accurate?
Because we understand them and don't misrepresent the process as Hovind does.