ES 02.3 Metamorphic Rock

What are the two main types of metamorphic rocks and how are they different?

• intrusive and extrusive; intrusive rocks are formed inside the earth and extrusive rocks are formed on the surface
• foliated and nonfoliated; foliated rocks do not have visible bands/layers and nonfoliated rocks do have visible bands/layers
• intrusive and extrusive; intrusive rocks are formed on the earth's surface and extrusive rocks are formed in the Earth
• foliated and nonfoliated; foliated rocks have visible bands/layers and nonfoliated rocks do not have visible bands/layers

The difference between regional metamorphism and contact metamorphism is that regional metamorphism is caused by _____ from __________ and contact metamorphism is caused by _________ from _______ intruding into other rock.

• heat, tectonic plates, pressure, magma
• pressure, tectonic plates, heat, magma
• heat, magma, pressure, tectonic plates
• pressure, magma, heat, tectonic plates

__________  metamorphic rocks have mineral grains that are not arranged in distinct bands.

• Conglomerate
• Non-foliated
• Foliated
• Permeated

Which texture best describes the rock above?

• porphyritic 
• nonfoliated
• foliated
• clastic

The deeper a rock is buried, the greater the pressure is on it

• True 
• False

True / False: Metamorphic rocks can be metamorphosed more than once.

• True
• False

During regional metamorphism, rocks are changed mostly due to this:

• Pressure from tectonic activity
• Heat from magma
• Hot chemical fluids
• Weathering and Erosion