Answer:
The deepest one of sample 1 and the bottom of sample 2
Explanation:
There are different ways to know a the rock age and the one based on fossils a very useful. Paleontologists have classified fossils and have defined some fossils markers to some periods of the geological time scale.
What we know is that if we find the same kind of fossil in different rock layers. then they are approximately the same age, and much better if they are in the same type of rock.
Here we have a blue layer with waves and with ammonite fossils (maybe) in both samples, then they should be same age.
