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.

Question

Quizplus · Accepted Answer

When a mineral's time clock is reset, it means that its radioactive isotopes have been altered or removed, leading to the loss of their ability to accurately measure time. As a result, any date obtained from such a mineral will represent the date of the metamorphic event, when the clock was reset, rather than the date of the rock's original formation. Therefore, choice B is the correct answer. Choices A, C, and D are incorrect.

The Resetting of a Mineral's Time Clock Means That