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actualism
actualism The theory that present-day processes provide a sufficient explanation for past geomorphological phenomena, although the rate of activity of these processes may have varied. The theory was first clearly expressed in 1749 by G. L. L. deBuffon, who proposed an age for the Earth of about 75 000 years, and was developed by James Hutton (see uniformitarianism). As ‘actualism’, it came to be generally accepted as a result of the much more convincing arguments advanced by Sir Charles Lyell (1797–1875) in his Principles of Geology (published 1830).
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MICHAEL ALLABY. "actualism." A Dictionary of Ecology. 2004. Encyclopedia.com. 28 May. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "actualism." A Dictionary of Ecology. 2004. Encyclopedia.com. (May 28, 2012). http://www.encyclopedia.com/doc/1O14-actualism.html MICHAEL ALLABY. "actualism." A Dictionary of Ecology. 2004. Retrieved May 28, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O14-actualism.html |
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actualism
actualism The theory that present-day processes provide a sufficient explanation for past geomorphological phenomena, although the rate of activity of these processes may have varied. The theory was first clearly expressed in 1749 by G. L. L. Buffon (1707–88), and was the essential principle of uniformitarianism as presented in 1830 by C. Lyell (1797–1875).
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Cite this article
AILSA ALLABY and MICHAEL ALLABY. "actualism." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 28 May. 2012 <http://www.encyclopedia.com>. AILSA ALLABY and MICHAEL ALLABY. "actualism." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 28, 2012). http://www.encyclopedia.com/doc/1O13-actualism.html AILSA ALLABY and MICHAEL ALLABY. "actualism." A Dictionary of Earth Sciences. 1999. Retrieved May 28, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-actualism.html |
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