Author Question: A radiometric date is determined from mica that has been removed from a rock. What does the date ... (Read 135 times)

Alygatorr01285 · **on:** Jul 29, 2018

A radiometric date is determined from mica that has been removed from a rock. What does the date signify if the mica is found in granite? What does the date signify if the mica is found in schist?

What will be an ideal response?

Question 2

The resetting of a mineral's time clock means that

A) a mineral can be formed and reformed again and again.
B) the date obtained will be the date of the metamorphic event, not the date of the rock's formation.
C) the date obtained will be the date of the rock's formation, not the date of the metamorphic event.
D) minerals can tell time just like a clock can tell time.

ghepp · **Reply #1 on:** Jul 29, 2018

Answer to Question 1

Answer: If the mica is found in granite, the date signifies the time of the granites crystallization. If the mica is found in schist, the date signifies the time of the last metamorphic event to affect that rock.

Answer to Question 2

Answer: B