…………… has popularized the concept of ‘Uniformitarianism’ in a book ‘Principles of Geology’ (1830).
C. Lyell
Uniformitarianism holds that the geological processes acting on the earth today (weathering, erosion, deposition, volcanism) also acted in the past at broadly similar rates, so that present-day processes are used to interpret the past.
The idea was first put forward by the Scottish geologist James Hutton in his Theory of the Earth (1788, expanded 1795), but his writing was difficult and the concept did not spread widely in his lifetime.
Charles Lyell restated it with abundant field evidence in his three-volume Principles of Geology (1830–1833); this book made uniformitarianism the ruling paradigm of geology and strongly influenced Charles Darwin.
Walther Penck is known for his work on slope development and crustal uplift (Die morphologische Analyse, 1924), and Alfred Wegener for the continental drift theory (1912, 1915); neither wrote Principles of Geology.
Therefore the person who popularized uniformitarianism through Principles of Geology (1830) is Charles Lyell.
Hence, C. Lyell.
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