Igneous Rocks Flashcards
dark colored rock formed from magma which is rich in iron and magnesium
Basaltic Rock
a rock that have mineral compositions between those of basaltic and granitic rocks
Andesitic Rock
The sequence in which minerals crystallize from cooling magma
Bowen’s Reaction Series
fine-grained igneous rocks that cool quickly on Earth’s surface
Extrusive rock
the process in which different minerals crystallize from magma at different temperatures
Fractional crystallization
light colored, made from magma with high silica content, containing mostly quartz and feldspars
Granitic rock
Rocks formed by the cooling of magma and lava
Igneous rocks
Igneous rock that forms when magma hardens beneath Earth’s surface.
Intrusive rock
molten rock that reaches Earth’s surface
Lava
molten rock beneath the Earth’s surface
Magma
the process by which different minerals in rock melt at different temperatures
Partial melting
A very coarse grained igneous rock; large crystals
Pegmatite
rock texture characterized by large, well-formed crystals surrounded by finer-grained crystals of the same or different mineral
Porphyritic texture
The look and feel of a rock’s surface, determined by the size, shape, and pattern of a rock’s grains.
Texture
igneous rock that has holes in it, made when gases become trapped in magma (as bubbles)
Vesicular texture
