A Radiometric Age for a Mineral Crystal Within an Igneous

Multiple Choice

A radiometric age for a mineral crystal within an igneous rock measures the amount of time that has passed since the ________.

A) atoms within the crystal were part of a body of molten magma
B) crystal solidified
C) temperature of the crystal became equal to the Curie point for the mineral
D) temperature of the crystal became equal to the closure temperature for the mineral