Metamorphic Rock Reveiw

Which of the following is NOT a factor in the formation of a Metamorphic rock?

• heat

• pressure

• volcanic eruption

• chemical action

During the process of metamorphism, rocks become:

• less dense and more porous

• molten and fluid

• lighter and more brittle

• denser and more compact

Metamorphic rocks are often described as being:

• rounded and smooth

• layered and stratified

• squished, smeared out, and folded

• glassy and translucent

Foliated metamorphic rocks are likely to form from:

• Rocks containing minerals that can align under pressure

• pure quartz sandstone

• volcanic glass

• limestone

The structure of foliated metamorphic rocks is often described as:

• circular and concentric

• platy or sheet like

• randomly oriented crystals

• bubble - filled and porous

What gives foliated metamorphic rocks their striped appearance?

• Alternating layers of different sediments

• Parallel alignment of certain minerals

• Intrusion of igneous material

• Weathering and erosion patterns

What is the main characteristic of non-foliated metamorphic rocks?

• They have visible layers or banding

• They have little or no mineral banding

• They always contain fossils

• They are always soft and crumbly

Which of the following can lead to the formation of non-foliated rocks?

• Extreme folding of rock layers

• Presence of flat or elongate minerals

• Minerals that don't align under pressure

• Exposure to high levels of radiation

Contact metamorphism occurs when:

• Two tectonic plates collide

• A rock is exposed to weathering

• Hot igneous rock intrudes into pre-existing rock

• A rock is subjected to high pressure over time

Which factor is NOT typically involved in contact metamorphism?

• heat

• pressure

• Intrusion of igneous rock

• Change in mineral structure