Earth Science
Name_____________________________
Chapter 10
Period_____________________________
Worksheet
Date______________________________
__________________________________________________________________________________
Metamorphic Rocks
True or False
For each statement write T in the blank provided if the statement is true, write F if the statement is false. (0.25 points each)
_____ 1. Most metamorphic rocks form near the Earth’s surface.
_____ 2. Metamorphism can change the mineral composition of rock.
_____ 3. Most metamorphic rock is formed by tectonic activity.
_____ 4. Metamorphism results from heat, pressure, and chemical processes.
_____ 5. Metamorphism can create a hard and durable rock from a softer sedimentary rock.
Fill in the Blank
Write the correct answer to complete each sentence in the space provided to the left of each question. (0.25 points each)
_______________ 6. Quartzite is produced by the metamorphism of _____.
_______________ 7. The type of metamorphism that results from the heat of magma is called _____.
_______________ 8. The appearance of the metamorphic rock in the
diagram indicates that is should be classified as _____.
_______________ 9. Slate is formed when great pressure acts on the
sedimentary rock _____.
_______________ 10. Metamorphism that occurs over large areas is called _____.
Classifying Metamorphic Rocks
The differences in the orientation, or alignment, of the crystals and the size of the crystals determine the texture of a metamorphic
rock. The two main textures of metamorphic rocks are foliated and non-foliated. Here are some more specific textures to
supplement the table of metamorphic rock information below.
Gneissic
Schistose
Slaty
Granoblastic
Hornfelsic
Coarsely foliated with coarse mineral grains.
Finely foliated forming thin parallel bands along which the rock splits easily
Very fin, foliated producing almost rigidly parallel planes of easy splitting
Non-foliated or only faintly foliated
Non-foliated with mineral grains that are commonly microscopic; breaks into sharp,
angular pieces
Questions (0.5 points each)
11. The classification of rocks is based primarily on _______________ and _______________.
12. Name the five textures of metamorphic rocks as given above.
13. Name the five most common types of metamorphic rocks.
14. What type or types of rocks would result from the metamorphism of the following rocks?
Limestone
Sandstone
Granite
Shale
15. For each of the following descriptions, indicate the type of metamorphic rock.
Granoblastic, fine to coarse-grained, composed mainly of calcite, dolomite, or both:
Very fine grained, exceptionally well-foliated rock:
Coarse-grained rock with distinct layers of different minerals; most abundant metamorphic rock
Very hard, sugary-textured granoblastic rock; widely distributed; made of interlocking quartz grains:
Hard, unfoliated, very fine-grained rock that breaks into sharp angular pieces: