Stromatolites dating method

Which of these does a better job of describing my age? So, in both geology and paleontology, we want to be able to point to an object and say exactly how old it is.

To do that, we have to learn a little bit about radioactive decay.

In 1896, a French physicist named Henri Becquerel discovered radioactivity in an element called uranium.

stromatolites dating method-41

In 1905, Ernest Rutherford figured out that we could use radiation to establish the ages of rocks.

By studying how the mass of uranium changed with radioactive decay, Rutherford was able to determine the age of a rock containing a uranium mineral. It meant that scientists could suddenly establish the actual ages of all their rocks and fossils!

But really, how do scientists figure out how old their dinosaur bones are?

And, what about other findings like fossil fish, plants and insects?

The most common form of relative dating is called stratigraphic succession.

This is just a fancy term for the way rock layers are built up and changed by geologic processes.

Scientists piece together a story of how one event came before or after another.

Relative dating cannot tell us the actual age of a rock; it can only tell us whether one rock is older or younger than another.

Recently, he appeared on the evening news to talk about a new dinosaur he just discovered. Paul says he can tell from the fossils that superus awesomus lived on Earth about 175 million years ago.

Tags: , ,