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| rocks formed by the cooling and solidification of magma (magma=molten rock) |
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-volcanic rock
-igneous rock formed by solidification of magma at eh earth's surface |
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-plutonic rocks
-igneous rocks formed by solidification of magma below the earth's surface |
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-composed mainly of ions that produce silicate materials
magmas are classified into three groups on the basis of the relative abundance of these oxides : mafic, intermediate, and felsic |
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| most common elements within earth |
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Definition
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| factors that influence melting of rock |
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Definition
| temperature, pressure, water pressure, rock type |
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| crystals forming individual mineral grains in a rock are made up of individual ions which have a fixed position and are bound to adjacent ions by atomic bonds |
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| at sufficiently high temperatures the ions break loose from their atomic bonds and the materials melt, it is now a liquid within which fluid flow may occur |
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two mineral recrystallization sequences occur at the same time as an originally mafic magma cools
-implies that every time a new mineral crystallizes from a magma it reacts with the magma to form a new mineral |
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