The Mesozoic Is A(n)

Q64: A group of periods is called a(n)<br>A)

Q65: The study of fossils is called<br>A) cryptology.<br>B)

Q66: Atomic nuclei that decay of their own

Q67: Because sediments are not deposited continuously in

Q68: The oldest era in the Phanerozoic eon

Q70: Fossils that are useful in correlating rock

Q71: The Petrified National Forest is found in

Q72: Geologists have principally used which class of

Q73: The Pliocene is a(n)<br>A) epoch.<br>B) era.<br>C) eon.<br>D)

Q74: The Quarternary is a(n)<br>A) epoch.<br>B) era.<br>C) eon.<br>D)