Knowra James Hutton James Hutton James Hutton (1726–1797) was a Scottish geologist and natural philosopher who argued that Earth’s features arise through ongoing processes operating over immense spans of time.
Uniformitarianism : The principle that geological processes observable today help explain features formed in the past. Hutton used present-day processes to infer how rocks and landscapes formed over deep time.
Siccar Point : A rocky headland on Scotland’s Berwickshire coast exposing an angular unconformity. Hutton, John Playfair, and James Hall examined its rock sequence as evidence of immense geological duration.
John Playfair : A Scottish mathematician and geologist who clarified and championed Hutton’s geological theories. His 1802 book made Hutton’s dense arguments more accessible and influential.
Scottish Enlightenment : An eighteenth-century intellectual movement in Scotland marked by advances in philosophy, science, and political economy. Its culture of inquiry shaped the institutions and discussions in which Hutton developed his ideas.
Deep time : The vast geological timescale extending far beyond recorded human history. Hutton argued that Earth’s cycles required spans of time far longer than conventional chronologies allowed.
Theory of the Earth : James Hutton’s 1788 paper proposing that geological processes continually renew Earth’s surface. This paper presented his cyclic account of erosion, sedimentation, uplift, and renewed exposure.
James Hall of Dunglass : A Scottish geologist and chemist who tested geological theories through laboratory experiments. Hall experimentally investigated Hutton’s ideas about heat, pressure, and rock formation.
Natural history : The study of nature through observation and description of living things, minerals, and geological features. Hutton’s geology emerged from a broader practice of observing and explaining the natural world.
Rock cycle : The set of processes through which rocks form, transform, and erode over geological time. Hutton connected erosion, sedimentation, burial, and uplift in a continuing cycle.
Theory of the Earth, with Proofs and Illustrations : Hutton’s expanded 1795 work setting out his geological theory and supporting observations. The two-volume book developed arguments that the 1788 paper had introduced briefly.
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