Author Question: How old is the oldest known mineral, a zircon crystal, on Earth? A) 13.7 billion years old B) ... (Read 61 times)

gbarreiro · **on:** Jul 15, 2018

How old is the oldest known mineral, a zircon crystal, on Earth?

A) 13.7 billion years old
B) 4.6 billion years old
C) 4.4 billion years old
D) 2.657 billion years old

Question 2

Where is the oldest known rock on Earth located?

A) Ural Mountains, Russia
B) Slave Craton, Alberta, Canada
C) Gobi Desert, Mongolia
D) Dharwar Craton, India