Igneous rocks pt 1

Igneous rocks pt 1 - Where did we leave off? How igneous...

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Where did we leave off? How igneous rocks cool (minerals cool at different temperatures) Mafic igneous rocks (also minerals)– low in Silica, high in iron – Ex is oceanic crust (basalt) – Olivine, augite, hornblende (green or dark-colored) – Crystallize at relatively high temperatures – Dark in color Felsic igneous rocks (also minerals) – high in silica, low in iron (and magnesium, manganese) – Ex. Is continental crust (granite) – Quarz, muscovite, biotite, k-feldspar (white, gray, pink in color)
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This note was uploaded on 12/01/2011 for the course GEO 101 taught by Professor Andreabair during the Fall '11 term at Central Mich..

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Igneous rocks pt 1 - Where did we leave off? How igneous...

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