Slide 1 Comments2What is a rock? Mafic – Thin, fast moving, hotter, contains large amounts of iron & magnesium.
May capture gas pockets in rock:
Intrusive: Formed from magma undergroundCools slowly – large crystals! Usually contain olivine & pyroxene.
Examples:
GabbroBasaltSlide 7 Comments8Igneous Rock FamiliesDiorite Family:Intermediate composition Rocks (neither mafic or felsic, but has characteristics of both)Usually grey or green.
Slide 12 Comments
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