Igneous Rocks

Rock cycle 

Types of Igneous rocks - intrusive, underground, cool slowly, large crystals; extrusive, volcanic, cool quickly, small/no crystals ; felsic - >65% SiO₂, much Na, K; intermediate; mafic - < 52% SiO₂, much Fe, Mg

mineralogy - Bowen's reaction series; discontinuous series, similar chemical composition (Fe, Mg), increasingly complex crystal structure, replacement of pre-existing crystals; continuous series, different chemical composition (Ca-Na), same 3-D crystal structure, continuous growth of crystals; granite/ rhyolite, diorite/andesite, gabbro/basalt , peridotite

Compare and contrast intrusive and extrusive igneous rocks in terms of location of formation, rate of cooling, and crystal size.

Draw Bowen’s reaction Series. What does it represent? Explain why it has its ‘Y’ shape and the significance of each of the 3 branches of the Y. What two factors are required for the reaction series to proceed? Describe how it is used to determine the name of an igneous rock.

Compare and contrast felsic and mafic rocks in terms of chemical composition, mineralogy, magma viscosity, type of volcanoes produced, textures of volcanic rocks, names of intrusive and extrusive rocks, ...