Carbon dating a rock awv dating ru
Pollen found in the Greenland icecap has been carbon dated, and also dated by counting ice layers. Trees grow a thick ring in a good year, and grow a thin ring in a bad year.
It is sometimes possible to match up tree-ring patterns between different trees.
And, we can date things that have been dated by some other method.
Historians don't have "right answers" for really old things.
This leaves out aquatic creatures, since their carbon might (for example) come from dissolved carbonate rock.
That causes a dating problem with any animal that eats seafood. After about ten half-lives, there's very little C14 left.
On the other hand, the abundance of argon in the Earth is relatively small because of its escape to the atmosphere during processes associated with volcanism.
As the name suggests, fossil fuel is old, and no longer contains C14.Acetone is sometimes used while extracting fossils, because it dissolves dirt.In short, unless you have evidence to the contrary, you should assume that most of the carbon in a fossil is from contamination, and is not originally part of the fossil. The nuclear tests of the 1950's created a lot of C14.So, anything more than about 50,000 years old probably can't be dated at all.If you hear of a carbon dating up in the millions of years, you're hearing a confused report. Second, they rarely contain any of the original carbon.