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uniformitarianism definition

uni·formi·tari·an·ism (-iz′əm)

noun

the doctrine that all geologic changes may be explained by existing physical and chemical processes, as erosion, deposition, volcanic action, etc., that have operated in essentially the same way throughout geologic time

Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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