A sillimanite hornfels would ________.
A)be formed at the highest grade of regional metamorphism
B)lie on the outermost edge of a contact aureole where hornfels are preserved
C)lie entirely within the core of the contact aureole occupied by the high grade
D)usually form from the complete subduction of ocean crust deep into the mantle

Question

Quizplus · Accepted Answer

Sillimanite hornfels forms at high temperatures and pressures typical of the conditions found within the core of a contact aureole, where the highest grade of metamorphism occurs due to the proximity to the heat source, such as an igneous intrusion.

A Sillimanite Hornfels Would ________