Transcript What is a Metamorphic Rock?

Chapter 2 Lesson 5: Metamorphic Rock
1. What is a Metamorphic Rock?
• A metamorphic rock is any rock that forms from another rock as a
result of changes in heat or pressure (or both heat and pressure).
• The rock can change both its shape and its composition.
2. What can a metamorphic rock form out of?
• Igneous
• Sedimentary
• Other metamorphic rocks
3. How do geologists classify metamorphic
rocks?
• According to the arrangement of the grains making up the rock.
4. What is foliated?
• Metamorphic rocks that have their grains arranged in either parallel
layers or bands are said to be foliated.
• Foliated describes the thin, flat, layering found in most metamorphic
rocks.
• The grains have been flattened.
5. A non-foliated rock contains…..
• A) no distinct layers or bands
• B) fossils of tiny organisms
• C) cemented sediment
• D) hardened lava
A non-foliated rock’s grains are arranged
randomly!
What type of rock is formed when heat
and/or pressure is applied to each?
• 6. granite- gneiss
• 7. shale- slate
• 8. Quartz sandstone- quartzite
• 9. Limestone- marble
How can these metamorphic rocks be used?
• 10. Marble- it has an even grain therefore it can be cut
into thin slabs or carved into many shapes. It is also
easily polished. Lastly, sculptures use it for statues and
buildings.
• 11. Slate- This comes in many colors such as grey red
and purple. It is Foliated. It is used for roofing,
outdoor walkways and trim for stone buildings.
12. The deeper that a rock is buried in the crust
the ______ the pressure on that rock.
•greater
Where types of rocks are found…