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Igneous Rocks

QuestionAnswer
How to do Igneous Rocks form? They form by cooling lava (outside surface) or cooling magma (inside surface)
What are the three types of Lava/Magma (compository) (classifying)? Felsic/Granitic , Andesitic, and Mafic/Basaltic
What does Felsic/Granitic mean? Light weight, High Si and O, Low Fe and Mg, Less dense, light colors.
What does Andesitic mean? Medium weight, medium color, more equal amounts of Si, O Fe, Mg, Medium denisity.
What does Mafic/Basaltic mean? Heavy weight, Darm color, High Fe, High Mg, Low Si, Low O, More density
What does Crystal Size mea? The amount of cooling time
What does longer cooling time mean? Larger Crystals
What does shorter cooling time mean? Smaller crystals
What does Intrustive mean? Form inside or near Earth's surface, has longer cooling time, Big crystals have developed. (Magma)
What does Extrusive mean? Forms outside or on Earth's surface (in air too), Short cooling time, Small or nearly no crystals. (Lava)
What does Porphy mean? Large crystals in a fine grain matrix.
Created by: SydneyNovak
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