Transcript Metamorphic Rock

Metamorphic Rock
Chapter 4 Section 4
Metamorphic Rock
• Rock that has changed its form
• Change is caused by heat and pressure
• Changes can occur in the rock’s:
- appearance
- texture
- crystal structure
- mineral content
Types of Metamorphic Rock
Types are classified according to the
arrangement of the grains
Types of Metamorphic Rock
• Foliated – contain layers or bands
• Rocks split along bands
Granite
changes to
Gneiss
Shale
changes to
Slate
Types of Metamorphic Rock
• Nonfoliated – mineral grains are random
– rocks do not split along bands
Sandstone
changes to
Quartzite
Limestone
changes to
Marble
Uses
• Marble and Slate are the most useful
• Buildings
• Statues
• Walkways
• blackboards