As magma solidifies to form rock, iron-rich minerals in the magma align with Earth's magnetic field in the same way that a compass needle does. When the rock hardens, the magnetic orientation of the minerals becomes permanent. This residual magnetism of rock is called paleomagnetism.
As magma solidifies to form rock, iron-rich minerals in the magma align with Earth's magnetic field in the same way that a compass needle does. When the rock hardens, the magnetic orientation of the minerals becomes permanent. This residual magnetism of rock is called paleomagnetism.
A pluton
pluton
having solidified from lava or magma
Igneous rock is formed from solidified and cooled magma or lava.
Solidified magma or lava.
The temperature of the magma will affect its viscosity depending on its chemistry. Some minerals crystallize at higher temperatures than others, meaning that portions of the magma may have already solidified. At lower temperatures, the majority of the constituent minerals will have crystallized and solidified, leaving the magma highly viscous.
Solidified magma or lava is igneous rock.
After a magma chamber and its conduit have solidified and been exposed by erosion, it is referred to as a "pluton." Specifically, if the solidified magma forms a large, irregular mass, it may be called a "batholith." These geological features are typically found in mountainous regions and provide insights into the Earth's geological history.
Magma forms from heated rock--it cools--minerals form--when totally solidified it is a rock.
The temperature of the magma will affect its viscosity depending on its chemistry. Some minerals crystallize at higher temperatures than others, meaning that portions of the magma may have already solidified. At lower temperatures, the majority of the constituent minerals will have crystallized and solidified, leaving the magma highly viscous. F ME NIGars
Intrusive igneous rock.