Lyell, Sir Charles (1797-1875), a British geologist. In Principles of Geology (3 volumes, 1830-33), Lyell conclusively demonstrated that the earth was very old and that its form had changed slowly, mainly from conditions such as erosion rather than great natural disasters.
Geologists are important to the advancement of geology. These scientists study the makeup of the Earth and its geologic processes. Here you can learn about geologists.
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