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Interacting with Journey
Through Geology CD-ROM
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Chapter 3:
Igneous Rocks, Intrusive Activity, and the Origin of Igneous Rocks
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Expand your knowledge of
the concepts presented in this chapter by using the CD-ROM to answer the following
questions.
- Pegmatite Pocket module:
What conditions promote the formation of large crystals in pegmatites? Give
3 examples of gemstones that are mined from pegmatites.
- Hot Spots module, Yellowstone,
Watch Hot Spot Animation: Yellowstone volcanic rocks are primarily rhyolites,
yet the Yellowstone volcanic system is fueled by a hot plume from the mantle.
Explain how an ultramafic magma could produce rhyolite eruptions.
- Rocks Melt module: Experiment
to find the crystallization (not melting ) temperatures of plagioclase, orthoclase,
and quartz at 1 atmosphere and at 5000 atmospheres. On Venus, which has no
water, would rock melt at deeper, shallower, or the same depths as on the
Earth?
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