Practice Quiz #6 - Chapter 6 100% Accurate!!

Practice Quiz #6 - Chapter 6 100%
Accurate!!

Compared to low-grade metamorphic rocks, high-grade rocks _____.

(a.) always contain more quartz and feldspar

(b.) are produced closer to the surface, high in the stratigraphic column

(c.) are produced at greater temperatures and pressures

(d.) are produced at cooler temperatures, but greater pressures - ANSWERS(c.) are produced at greater
temperatures and pressures

Two common metamorphic rocks that typically lack foliation are _____.

(a.) slate and phyllite

(b.) gneiss and migmatite

(c.) quartzite and marble

(d.) schist and metaconglomerate - ANSWERS(c.) quartzite and marble



The process of high-grade metamorphic rocks being altered to form low-grade metamorphic rocks is
termed _____ metamorphism.

(a.) foliated

(b.) prograde

(c.) retrograde

(d.) dynamic - ANSWERS(c.) retrograde



Thermal (contact) metamorphism _____.

(a.) occurs in areas surrounding igneous intrusions

(b.) occurs only where gneiss is in contact with schist

(c.) occurs as a consequence of the sinking of a broad region to great depth

(d.) takes place only at the surface, where rock is in contact with the atmosphere - ANSWERS(a.) occurs
in areas surrounding igneous intrusions