# Principles of Geology

_or, The Modern Changes of the Earth and its Inhabitants Considered as Illustrative of Geology_

By Charles Lyell, Sir.

"Principles of Geology" by Sir Charles Lyell is a three-volume work published between 1830 and 1833. Lyell challenged prevailing beliefs by proposing that Earth's surface changed through slow, gradual processes rather than catastrophic events. Using evidence from Mount Etna and other geological formations, he argued that present-day processes explain the past, suggesting Earth was far older than previously thought. His theory of uniformitarianism revolutionized geology and profoundly influenced Charles Darwin, who carried the first volume aboard the HMS Beagle. (Summary by Project Gutenberg, written by machine.)

- Language: English
- Subjects: Geology

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## Audiobooks of it

- [Principles of Geology](https://invisiblenetwork.ai/books/librivox/10961) by Charles Lyell (46 h 1 min, English)

From Project Gutenberg. Public domain in the United States.