Foliated & nonfoliated rocks

1. Pgs 100-101Pgs 100-101
Most metamorphic rocks develop Most metamorphic rocks develop
bands of mineralsbands of minerals

2. Nonfoliated and Foliated RocksNonfoliated and Foliated Rocks
•Nonfoliated rocks are
rocks that has not
been subjected to
heat and pressure
•Nonfoliated rocks’
bands are not lined
up
•Foliated rocks are
rocks that are
objected subjected to
heat and pressure
•Foliated rocks’ bands
are lined up

3. Foliated RocksFoliated Rocks
•Foliated rocks form when foliation occurs
•Foliation develops when minerals flatten
out in a line up of bands and when rocks
are under heat and pressure

4. Nonfoliated and Foliated RocksNonfoliated and Foliated Rocks
•All rocks are either nonfoliated or foliated
rocks

5. Nonfoliated Rocks Nonfoliated Rocks
•Metamorphic rocks that does not show
foliation are called nonfoliated rocks
•One reason that metamorphic rocks may
turn into a nonfoliated rock is because the
rock wasn’t subjected to heat and
pressure

6. Example 1Example 1
•Phyllite is foliated
because using a
microscope you can
see the bands are
lined up

7. Example 2Example 2
•Marble is nonfoliated
because the mineral
crystals are not lined
up in this rock
•Marble is also made
of limestone

8. The EndThe End