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  2. Lyell's scientific contributions included a pioneering explanation of climate change, in which shifting boundaries between oceans and continents could be used to explain long-term variations in temperature and rainfall. Lyell also gave influential explanations of earthquakes and developed the theory of gradual "backed up-building" of volcanoes.

  3. I use ‘theory’ in the definite sense of a set of hypothetical statements such that deductions can be made and compared with data, facts, or generalizations obtained in some other way than as derivation from theory.

  4. Uniformitarianism is a theory based on the work of James Hutton and made popular by Charles Lyell in the 19 th century. This theory states that the forces and processes observable at earth’s surface are the same that have shaped earth’s landscape throughout natural history.

  5. Lyell's uniformitarianism is a family of four related propositions, not a single idea: Uniformity of law – the laws of nature are constant across time and space. Uniformity of methodology – the appropriate hypotheses for explaining the geological past are those with analogy today.

  6. CHARLES LYELL, RADICAL ACTUALISM, AND. THEORY. W. FAYE CANNON*. THIS is a theoretical paper. A little theory goes a long way in history, for me; but it is good to collect as much as is feasible in one paper, so that gaps and inconsistencies can be noticed. I use 'theory' in the definite sense of a set of hypothetical statements such that ...

  7. Apr 16, 2023 · Charles Lyell: An English geologist, Lyell further developed and popularized the concept of uniformitarianism in the early 19th century.

  8. The theoretical system Lyell presented in 1830 was composed of three requirements or principles: 1) the Uniformity Principle which states that past geological events must be explained by the same causes now in operation; 2) the Uniformity of Rate Principle which states that geological laws operate with the same force as at present; 3) the ...

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