Questions and Answers
What are the first two minerals to crystallize in a magma chamber?
Olivine and Ca-rich plagioclase
What are the last minerals to crystallize in a magma chamber?
K-spar, muscovite, and quartz
What type of rocks contain pyroxene, amphibole, and plagioclase?
Basaltic in composition (basalt or gabbro)
What type of rocks contain olivine and Ca-rich plagioclase?
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What type of rocks contain biotite and Na-rich plagioclase?
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What type of rocks contain k-spar, muscovite, and quartz?
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Will olivine and quartz be found in the same rock?
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As minerals crystallize, they will sink to the bottom of the magma chamber. This is called ___________.
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What type of rock will form at the top of magma chambers?
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Where does peridotite form?
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What is Pikes Peak?
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How do we know Pikes Peak is not a volcano?
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What rock has the same mineralogical composition as granite?
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What rock has the same mineralogical composition as andesite?
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What rock has the same mineralogical composition as gabbro?
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Study Notes
Bowen's Reaction Series
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Olivine and calcium-rich plagioclase (Ca-rich plag) crystallize first in a magma chamber.
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Potassium feldspar (k-spar), muscovite, and quartz crystallize last in a magma chamber.
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Rocks with pyroxene, amphibole, and plagioclase are basaltic in composition (basalt or gabbro).
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Ultramafic rocks, such as peridotite, are characterized by the presence of olivine and calcium-rich plagioclase.
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Rocks containing biotite and sodium-rich plagioclase (Na-rich plag) are andesitic in composition (andesite or diorite).
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Granitic rocks, such as granite or rhyolite, comprise k-spar, muscovite, and quartz.
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Olivine and quartz will not be found in the same rock due to different crystallization temperatures and locations.
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Crystal settling is the process where crystallized minerals sink to the bottom of the magma chamber.
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Granite forms at the top of magma chambers due to its lighter composition.
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Peridotite occurs at the bottom of the magma chamber, where high-density minerals accumulate.
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Pikes Peak is classified as a batholith, a large mass of igneous rock.
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Pikes Peak is identified as non-volcanic because it is composed of granite, an intrusive igneous rock.
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Rhyolite shares the same mineralogical composition as granite, reflecting similar formation conditions.
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Diorite has the same mineralogical composition as andesite, indicating parallel formation environments.
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Basalt is mineralogically equivalent to gabbro, representing a relationship between magma type and cooling rate.
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Description
Test your knowledge of Bowen's Reaction Series with this quiz. It includes key minerals and their crystallization order from a magma chamber. Challenge yourself and deepen your understanding of igneous rock formation.
