Although many people think radiocarbon dating is used to date rocks, it is limited to dating things that contain the element carbon and were once alive (like fossils).Rb)—are not being formed on earth, as far as we know.We will deal with carbon dating first and then with the other dating methods.Carbon has unique properties that are essential for life on Earth.
Carbon-14 can yield dates of only “thousands of years” before it all breaks down.
These excited neutrons then collide with nitrogen atoms in the atmosphere, changing them into radioactive carbon-14 atoms.
CARBON-14 IS ABSORBED (Figure 1b): Plants absorb this carbon-14 during photosynthesis.
So, we have a “clock” which starts ticking the moment something dies.
Obviously, this works only for things which were once living.