Answer:
1) The rocks are probably the same age.
<u>If two rocks both contain the same type of index fossil, their age is probably very similar.</u>
2) Eon
Definition of Eon: An immeasurably or indefinitely long period of time
Below
Explanation:
Most dinosaurs
Passenger Pigeon
Saber Toothed Tiger
Dodo
Great auk
Pyrean ibex
Giant Ground Sloth
Aurochs