Geology102:Quiz-Unit06

Which of the following is NOT one of the three principal metamorphic agents?

• Heat

• Pressure

• Chemical fluids

• Wind

What does the term "metamorphic" mean in the context of rocks?

• Change in composition and/or texture

• Formation of new minerals

• Erosion by water

• Melting into magma

What is the role of temperature in the formation of metamorphic rocks?

• It causes rocks to melt into magma

• It changes the chemical equilibrium in minerals

• It erodes rocks into sediment

• It cools rocks into igneous form

How does recrystallization affect mineral crystals?

• It fractures the mineral crystals, making them smaller.

• It dissolves the minerals completely.

• It rearranges mineral crystals without fracturing them, increasing grain size.

• It decreases the grain size by breaking down the crystals.

What is the primary role of fluids in fluid-activated metamorphism?

• To cool down the surrounding rocks

• To dissolve and transport minerals

• To increase the temperature of the rocks

• To prevent chemical reactions

Which mineral is commonly associated with hydrothermal alteration of mafic mantle rock?

• Quartz

• Serpentine

• Feldspar

• Calcite

What happens when seawater circulates down through fractures in basalt?

• The basalt becomes more solid

• Mineral ions are removed from the rock

• The rock becomes colder

• The rock expands

What is the term used to describe minerals lined up in planes?

• Lineation

• Foliation

• Crystallization

• Sedimentation

Which mineral is commonly found in phyllite?

• Quartz

• Feldspar

• Muscovite

• Calcite

What distinguishes foliated metamorphic rocks?

• Their color variations

• Their style of foliation

• Their chemical composition

• Their hardness