Start Relative age and relative dating

Relative age and relative dating

But the most accurate forms of absolute age dating are radiometric methods. Sedimentary rocks in particular are notoriously radioactive-free zones.

Geologists draw on it and other basic principles ( to determine the relative ages of rocks or features such as faults.

It’s based either on fossils which are recognized to represent a particular interval of time, or on radioactive decay of specific isotopes. Based on the Rule of Superposition, certain organisms clearly lived before others, during certain geologic times.

After all, a dinosaur wouldn’t be caught dead next to a trilobite.

Unlike people, you can’t really guess the age of a rock from looking at it.