Geology 105 study guide questions: Igneous Rocks • Bowen’s Reaction Series • Ign

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Geology 105 study guide questions: Igneous Rocks
• Bowen’s Reaction Series • Igneous Compositions • Igneous Textures • Naming Igneous Rocks • What are plutons? How are they classified? • Types of plutons • Where does igneous activity occur? Geology 105 study guide questions: Igneous Rocks
• Bowen’s Reaction Series • Igneous Compositions • Igneous Textures • Naming Igneous Rocks • What are plutons? How are they classified? • Types of plutons • Where does igneous activity occur? Geology 105 study guide questions: Igneous Rocks
• Bowen’s Reaction Series • Igneous Compositions • Igneous Textures • Naming Igneous Rocks • What are plutons? How are they classified? • Types of plutons • Where does igneous activity occur?

Explanation / Answer

Bowens reaction series tells us the crystallization sequence of minerals fwhich are forming from magma. It has continuous reaction series in which plagioclase minerals crystallize simultaneously with decreasing temperatures and discontinuous reaction series in which minerals like olivine and pyroxene will crystallize at intervals of temperatures

2) felsic which are rich in silica. Example granite

Mafic , low in silica content. Example basalt

Intermediate, medium silica content. Example diorite

Ultramafic, very low silica content. Example peridotite

3) texture is the mutual relationship between grains size , shape etc. the common textures of igneous rocks are porphyritic and poikilitic , equigranular etc

porphyritic texture - when larger crystals are surrounded by fine grained crystals

poikilitic texture- when small crystals are surrounded by larger crystals

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