= Uniformitarianism
{wiki=Uniformitarianism}
Uniformitarianism is a foundational principle in geology and Earth sciences that asserts that the processes shaping the Earth today, such as erosion, sedimentation, and volcanic activity, have operated in fundamentally the same way throughout geological history. This concept is often summarized by the phrase "the present is the key to the past." The principle was popularized in the 19th century by geologists such as James Hutton and later by Charles Lyell.
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