Earth's geological history is divided into seven distinct evolutionary phases
In short: Researchers who reviewed the geological record have proposed a framework for Earth's history. By analyzing the rock and mineral archive found in the continental lithosphere, they have divided the planet's secular evolution into seven specific stages, ranging from the initial formation of the Proto-Earth to the current Contemporary Earth.
This classification helps scientists understand how tectonic modes and lithospheric behavior changed over billions of years. The researchers integrated geological data with knowledge of mantle cooling and lithospheric rheology to map these transitions.
Because this is a review of existing geological archives, the framework is constrained by the availability and range of accessible data preserved in the rock record.
Why it matters: This framework provides a structured way to understand how Earth's tectonic behavior and lithosphere evolved over billions of years.
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Sources
- Source: Research: Cawood et al. (2022). Secular Evolution of Continents and the Earth System. Reviews of Geophysics. · cc-by
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