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{{#invoke:Hatnote|hatnote}} Geology (from the Greek γῆ, , i.e. "earth" and -λoγία, -logia, i.e. "study of, discourse"<ref name=OnlineEtDict>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref name=LSJ></ref>) is an earth science comprising the study of solid Earth, the rocks of which it is composed, and the processes by which they change. Geology can also refer generally to the study of the solid features of any celestial body (such as the geology of the Moon or Mars).

Geology gives insight into the history of the Earth by providing the primary evidence for plate tectonics, the evolutionary history of life, and past climates. Geology is important for mineral and hydrocarbon exploration and exploitation, evaluating water resources, understanding of natural hazards, the remediation of environmental problems, and for providing insights into past climate change. Geology also plays a role in geotechnical engineering and is a major academic discipline.

Geology sections
Intro  Geologic materials  Whole-Earth structure  Geologic time  Dating methods  Geological development of an area  Methods of geology  Planetary geology  Applied geology  History of geology  Fields or related disciplines  Regional geology  See also  References  External links  

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