Igneous Rocks Guided Study
1. How are igneous rocks formed? What is the difference between intrusive and extrusive igneous rocks,
and what is another name for each?
2. Name and describe in detail the three ways magma forms (Melting is fromn
3. Name and give a thorough description of each of the 4 magma types.
4. Complete BowenàReaction Series by filling in the missing information on the red lines.
5. What is happening to the minerals in the discontinuous series? Why is the continuous series useful when
examining an igneous rockàhistory?
6. Name and describe the three ways to generate a felsic melt (make granite).
7. What are xenoliths and how do they form?
8. What does texture tell you about an igneous rock?
9. Write a brief description of each igneous rock texture below
Pegmatitic:
Phaneritic:
Porphyritic:
Aphanitic:
Vesicular:
Glassy:
Pyroclastic:
Instructional Video Series: Igneous Rocks
Fill in each section with information from the Instructional Video Series.
Texture: Pegmatitic and Phaneritic
Texture: Porphyritic and Aphanitic
Texture: Vesicular, Glassy, Pyroclastic
Magma Types

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