Author Question: In adjacent rocks that show a gradual increase in metamorphic intensity, the first appearance of a ... (Read 140 times)

HCHenry · **on:** Jul 15, 2018

In adjacent rocks that show a gradual increase in metamorphic intensity, the first appearance of a
particular index mineral indicates
a. the location of the minimum pressure and temperature conditions needed for the formation
of that mineral.
b. the location of the maximum pressure and temperature conditions needed for the
formation of that mineral.
c. the rocks formed under the same broad conditions of temperature and pressure.
d. the location on Bowens reaction series where that mineral is in equilibrium.

Question 2

Foliated metamorphic rocks form when pressure is applied
a. outward at the two sides (tension).
b. inward at the two sides (compression).
c. in a shearing environment (tension).
d. as compression or tension