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Geology
The science that comprises the study of the solid Earth and the processes by which it is shaped and changed.
Industry: Earth science
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Geology
frost wedging
Earth science; Geology
A process that mechanically breaks apart rock caused by expansion of water as it freezes in cracks and crevices.
fumarole
Earth science; Geology
An opening at the Earth's surface that emits water vapor, hydrogen sulfide, and other gases, often at high temperature.
fumarole activity
Earth science; Geology
Volcanic gas emissions, that may be accompanied by a change in the temperature of the gases or fluids emitted.
geothermal energy
Earth science; Geology
Power generation using natural steam derived from the Earth's internal heat.
glass (volcanic)
Earth science; Geology
Natural glass (obsidian) that forms when molten lava cools too rapidly to permit crystal growth.
glacier
Earth science; Geology
A mass of ice, formed by the recrystallization of snow, that flows forward, or has flowed at some time in the past.
glacier outburst flood
Earth science; Geology
A sudden release of melt water from a glacier or glacier-dammed lake sometimes resulting in a catastrophic flood, formed by melting of a channel or by subglacial volcanic activity.