Metamorphic Rocks: Geological Processes & Time Scale

What is the general time scale for the formation of metamorphic rocks?

• A) A few years

• B) Hundreds of years

• C) Tens of millions of years

• D) Billions of years

The pressure on rocks during the process of metamorphosis causes _______ to form.

• Light and dark color bands

• Crystals

• Fossils

• Lava

What is a metamorphic rock?

• A rock formed from magma

• A rock formed from existing rock exposed to large changes in temperature and pressure

• A rock formed from sediment

• A rock formed from volcanic ash.

Match the following processes with their descriptions: Formation of metamorphic rock, Exposure to temperature and pressure, Change in mineral content.

• C

• Existing rock exposed

• A

• Near a magma chamber.

• B

• Over millions of years

Metamorphic rock can form in areas near a ________ chamber.

• water

• magma

• ice

• wind