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The oldest and largest division of geologic time, between the consolidation of the Earth's crust and the beginning of the Cambrian period. It includes all time from the origins of the Earth to about 542 million years ago; about 3.3 billion years in duration.
- Browse Related Terms: Borrow pit, Crustal spreading center, Cut-and-fill, Extensional (structural features or faults), Geotechnical, Landform, Lava, Mantle, Precambrian, Rift, Seismic, Special Use Airspace (SUA), Topography, Troposphere, Volcanic chain, Volcanism