A layer of peat buried beneath the glacial sediments from the last ice age had a carbon-14 content of 25% of that found in living organisms. How long ago was this ice age?
Here, we are going to calculate the old of the ice age.
Half life period of the carbon-14 is 5730 years
= 1.209x 10-4 yr-1
-kt = ln= ln = -1.3863
= = 1.146645 x 104 yr
= 11466.45 yr
Thus, the ice age is 11466.45 years old.
Note, if we take, -1.386 instead of -1.3863