Transcript metamorphic rocks 6-2

§6-2 “Metamorphic Rocks”
Objectives:
• Distinguish between regional and contact
metamorphism.
• Distinguish between foliated and
nonfoliated metamorphic rocks and give an
example of each.
Metamorphism
• Changing of one type of rock to another by
heat & pressure or chemical processes.
• Metamorphic rocks are formed from all 3
types of rocks.
Contact Metamorphism
• Magma rises into existing rocks & the heat
causes changes in the minerals.
Regional Metamorphism
• Caused by tectonic activity at plate
boundaries.
• Friction creates immense heat & pressure
which changes the chemical composition of
a rock.
Metamorphic Rock Video Clip
Classification of Metamorphic Rocks
Only 2 choices:
• Foliate
– Similar to layers
– Also called “banding”
• Nonfoliated
– Similar to fracture
Foliated Rocks – show layering
or “banding”
Nonfoliated Rocks – Crystals
grow as rock heats up
Limestone changes to
Sandstone changes to
Assignments
•
•
•
•
Finish worksheet packet & have checked off.
Look at metamorphic rocks in boxes.
Go over worksheets Wednesday
Test on Thursday in Computer Lab.
– Field trip people  test on paper Friday in class
– Everyone else  ch 12 vocab on Friday in class
• STUDY – STUDY --- STUDY
Page 191 –Blue Box #1
• If you were to start a rock collection, what
10 rocks would you like to include & why.
• EXAMPLE: Moon Rock – because they are
rare and I was born when the first astronauts
landed on the moon