Relating to geology or the physical structure and substance of the Earth. Pertaining to the study of rocks, minerals, and the Earth's physical processes.
From Greek 'geo' meaning 'earth' and 'logos' meaning 'study' or 'discourse,' combined with the suffix '-ic.' The term emerged in the late 18th century as the scientific study of Earth's structure became formalized.
Geologic time operates on scales so vast that all of human history represents less than a blink of an eye - if Earth's history were compressed into a single year, humans would appear only in the last few minutes of December 31st. Geologists use relative dating techniques and radiometric dating to piece together Earth's 4.6-billion-year story.
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