Geology 100 Final Exam Review 2

Foliation or schistose textures are easily seen in rocks consisting of (a)   .

• framework silicates (quartz, feldspar)

• platy minerals (micas)

• chain-silicates (amphiboles)

• half mafic and half felsic minerals

Which of these tectonic settings will be hottest at 20km depth?

• Stable continental crust

• A fold-and-thrust mountain belt

• A volcanic arc

• Temperature at depth is not affected by tectonic setting.

Tags

NGSS.HS-ESS2-3

3. Subduction zones are areas of high temperature and low pressure. Therefore metamorphic rocks from a subduction zone are usually part of the (a)   facies.

• blueschist

• hornfels

• eclogite

• granulite

The retrograde path of a metamorphic rock occurs during

• exhumation and cooling

• burial and heating

• exhumation and heating

• none of the above

Which of the following rocks is not foliated?

• gneiss

• greenschist

• quartzite

• migmatite

Put phyllite, gneiss, schist and slate in order from low grade to high grade metamorphism

• Phyllite, schist, slate, gneiss

• Slate, phyllite, schist, gneiss

• Slate, schist, phyllite, gneiss

Regional metamorphism occurs typically during?

• Transform faulting

• Reverse faulting

• Subjection volcanism

• Orogenies

Which of the below listed rocks is not a granoblastic rock?

• Quartzite

• Migmatite

• Hornfel

• Amphibolite

Shock metamorphism occurs when:

• a. a meteorite collides with the earth.

• b. a comet hits the moon

• c. life disrupts crystal growth during metamorphism.

• d. an earthquake triggers micro-faulting.

Which of the following metamorphic rocks is formed by high pressure regional metamorphism?

• phyllite

• slate

• schist

• eclogite