Chapter # - Chp 3 Igneous rocks Christian Smith Andesitic...

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Chp. 3 Igneous rocks Christian Smith Andesitic composition- Is an extrusive rock int3ermediate in composition between rhyolite and basalt. Aphanitic texture- igneous rock that forms at the surface or as small masses within the upper crust where cooling is rapidly a fine grained texture. Assimilation- mixing of two or more magmas or even by replenishment of the magma chamber with fresh, hot magma. Basaltic composition- Rocks that contain a substantial dark silicate minerals and calcium-rich plagioclase feldspar. Bowen’s reaction series- Bowen also demonstrated that if the solid components of a magma remain in contact with the remaining melt, eventually they will chemically react and evolve into the next mineral. Crystallization- is also a chemical solid–liquid separation technique, in which mass transfer of a solute from the liquid solution to a pure solid crystalline phase occurs. Crystal settling- this process occurs when the earlier-formed minerals are denser than the liquid portion and sink toward the bottom of the magma chamber.
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  • Spring '13
  • NguyenVanVuong
  • Petrology, Granite, Basalt, texture- igneous rock

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