Techniques used to establish relative dating
Geologists establish the age of rocks in two ways: numerical dating and relative dating.
A submethod within biostratigraphy is faunal association: Sometimes researchers can determine a rough age for a fossil based on established ages of other fauna from the same layer — especially microfauna, which evolve faster, creating shorter spans in the fossil record for each species.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.Paul is super awesome, so I'm going to take him at his word.But really, how do scientists figure out how old their dinosaur bones are?
And, what about other findings like fossil fish, plants and insects?
Biostratigraphy: One of the first and most basic scientific dating methods is also one of the easiest to understand.
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