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Principles of Geology

work by Lyell

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Charles Lyell's Principles of Geology (1830–33) introduced the concept of uniformitarianism to geology. This theory posits that the geological processes shaping Earth today are the same ones that have operated throughout its history, and at consistent energy levels. Lyell argued against catastrophism, proposing that Earth's features result from slow, gradual changes over vast periods.123

His work emphasized careful observation and methodology for interpreting rock formations. Lyell's ideas laid the groundwork for modern geology and influenced evolutionary biology by highlighting Earth's immense age.12

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