Which is not a clue indicating that hornfels forms under conditions of high temperature but not high pressure?
A) chemical composition
B) lack of foliation
C) cleavage planes
D) grain size

Question

Quizplus · Accepted Answer

Cleavage planes are not an indicator of the formation of hornfels under high temperature but not high pressure.  Chemical composition, lack of foliation, and grain size are all indicators of this type of formation.

Which Is Not a Clue Indicating That Hornfels Forms Under