Physical Geography 102
Rocks that formed from the cooling and crystallization of magma
Igni- (Latin) =
-ous (Latin) =
Origin of Magma
Magma - liquid rock or molten rock
Needed to make magma:
Products given off by material as a vapor or gas
Water and carbon dioxide
Volatiles will lower the melting temperature
Increased temperature will cause melting
Sources of heat in the Earth's interior:
Different materials melt a different temperatures.
Partial melting is the melting of some of the material in a rock but not the entire rock.
The composition of a magma will be different from the composition of the rock if the rock is not completely melted.
Reversal of melting resulting from:
Sequence of Crystallization
Partial melting says that different material melt at different temperatures
Different materials solidify or crystallize at different temperatures