A geothermometer is
A)a device that measures current rock temperatures.
B)a device that measures temperature when lowered into deep drill holes.
C)a mineral assemblage that reveals the maximum temperature attained by a rock.
D)the range of temperatures encountered by a rock in its geologic history.

Question

Quizplus · Accepted Answer

A geothermometer refers to a mineral assemblage or a specific mineral composition that can be used to estimate the maximum temperature a rock has been subjected to, based on the equilibrium of mineral phases at known temperatures.

A Geothermometer Is