The generation, movement and eventual solidification of molten rock, or magma, within the Earth's crust and upper mantle. Magmatism ranges from the slow crystallization of magma at depth into intrusive igneous rock to its eruption at the surface as lava, and drives both mountain building and volcanic activity.
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Shaped
Devils Tower is a laccolithic butte of igneous rock, formed when magma intruded existing sedimentary layers.
Source Devils Tower (Wikipedia)
Sources
1. Magma - Wikipedia
Origins section
Magma is produced by melting of the mantle or the crust in various tectonic settings, which on Earth include subduction zones, continental rift zones, mid-ocean ridges and hotspots.
Lead section
Magma (from Ancient Greek μάγμα (mágma) 'thick unguent') is the molten or semi-molten natural material from which all igneous rocks are formed.
View the SourceDevils Tower (Wikipedia)
Wikimedia FoundationShaped: Devils Tower, Geology sectionQuote, Shaped: Devils Tower, Geology section
Magma rose through the crust, intruding into the existing sedimentary rock layers.
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