The closure temperature represents the point when
A) a magma cools to the point where minerals begin to crystallize.
B) radioactive isotopes begin to decay.
C) atoms are no longer free to move out of a crystal lattice.
D) the last remaining magma crystallizes.

Question

Quizplus · Accepted Answer

The closure temperature refers to the temperature at which atoms become fixed in a mineral's crystal lattice and can no longer move and exchange with the surrounding environment. This typically occurs during the cooling and crystallization of a magma, but can also occur during metamorphism or other geological processes.

The Closure Temperature Represents the Point When