What is the likely age of diamonds brought up in xenoliths of cratonic keels?
A)several million years
B)50 million years
C)100 million years
D)billions of years

Question

Quizplus · Accepted Answer

Diamonds found in xenoliths of cratonic keels are typically ancient, often forming billions of years ago. These deep parts of continental plates provide the high-pressure conditions necessary for diamond formation over extensive geological timescales.

What Is the Likely Age of Diamonds Brought Up in Xenoliths