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Geology

Plutons

QuestionAnswer
Pluton Any body of igneous rock that solidified far below the earths surface
Intrusive Magma forced into cracks of other rocks and crystallized but not reaching the surface.
Xenolith A rock fragment foreign to the igneous rock in which it is embedded
Sills A horizontal intrusion of molten or solidified magma
Batholith Large emplacement of igneous intrusive rock that forms from cooled magma deep in the earths crust. Almost always felsic or intermediate and is bigger than 100 km.
Dike A vertical intrusion of molten or solidified magma
Columnar joints Structure where sets of interesting closely spaced fractures result in the formation of regular array of polygonal prisms or columns.
Created by: sprestidge34
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