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Geology ((Cooling (a cooling system that uses a fluid to transfer heat…

- - - - a naturally occurring solid material from which a metal or valuable mineral can be extracted profitably
- - - - Intrusive rock is formed when magma crystallizes and solidifies underground to form intrusions, for example plutons, batholiths, dikes, sills, laccoliths, and volcanic necks.
    - - Extrusive rock refers to the mode of igneous volcanic rock formation in which hot magma from inside the Earth flows out onto the surface as lava or explodes violently into the atmosphere to fall back as pyroclastics or tuff.This is as opposed to intrusive rock formation, in which magma does not reach the surface.