Exam 7: Metamorphism, Metamorphic Rocks, and Hydrothermal Rocks

If the mineral assemblage in metamorphic rocks is the same, they are regarded as having formed under similar pressure and temperature conditions and belong to the same _______.

When a rock is buried to increasing depth it is subject to increasingly greater temperature and pressure and will undergo _____.

A mineral is said to be ____, if after a long time it does not convert to a new mineral.

The two most common non-foliated metamorphic rocks are _______ and marble.

_________ is the pressure felt by deeply buried rock.

___ is a metamorphic rock with distinct light and dark layers that formed at high temperatures and pressures.

___ is produced when grains of quartz in sandstone are welded together when the rock is subjected to high temperatures.

___ tends to deform objects into oblong or flattened forms.

Schist is a metamorphic rock characterized by a nonfoliated texture.

The deeper a rock is below the Earth's surface ______.

The differential stress responsible for foliation can take place at _____.

_____ are important economic resources for lead, zinc, gold, silver, tungsten, tin, and mercury.

Hydrothermal processes are not important along submarine mid-ocean ridges because of the cooling effect of seawater.

______ stress is a type of differential stress.

Metamorphic rocks owe their texture mostly to temperature.

The original rocks must have been brittle in order for them to bend and mold under stress.

Metamorphism includes melting.

___ is a fine-grained metamorphic rock whose parent rock was basalt.

Contact metamorphism occurs adjacent to a pluton when a body of magma intrudes relatively cool country rock.

Minerals that crystallize in needle-like shapes (for example hornblende) grow with their long axis parallel to the plane of foliation.