Examples of Nonfoliated Metamorphic Rocks
Metamorphic rocks that do not have distinct layering are called nonfoliated rocks. Below are some common examples of non-foliated metamorphic rocks.
Rock |
Picture
(click for larger image) |
Features |
Metamorphic Grade |
Other information |
Marble |

(Courtesy USGS) |
Since the dominant mineral is usually calcite, this rock fizzes in acid.
Marble often has little wavy cracks in it called stylolites. |
Intermediate to high grade |
Marble is metamorphosed limestone!
It is carved into
statues and used for building stone. |
Quartzite |

(Courtesy USGS) |
Made of quartz, this rock is able to scratch glass. |
Intermediate to high grade |
Quartzite is metamorphosed sandstone!
It is very hard and is often used as a building stone.
|
Metabasalt
(Greenstone) |

(Courtesy USGS) |
This rock is usually non-foliated and sometimes you might find foliated
pieces of it. The mineral chlorite gives it a green color. |
Low grade |
Metabasalt is metamorphosed basalt!
It is sometimes called greenstone, or greenschist if it is foliated. |
Last modified August 18, 2003 by Lisa Gardiner.
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