The cartographer who made this map decided not to
use geologic time in the key. Which is the oldest rock shows on the map?
A)rock labeled 9
B)rock labeled 1
C)cannot be determined
D)all rock is same age
![The cartographer who made this map decided not to use geologic time in the key Which is the oldest rock shows on the map Arock labeled 9 Brock labeled 1 Ccannot class=](https://us-static.z-dn.net/files/d99/9c394ee80448b9145cecb51503643482.png)