James Hutton's ideas focused on uniformitarianism and the Earth's old age, not plate tectonics.
Plate tectonics was not an idea first realized by James Hutton. Hutton's groundbreaking contributions to geology included the concepts of uniformitarianism and the Earth's ancient age due to the slow geological processes over time. His observations of rock layers and unconformities led him to infer the extensive timescales involved in the formation of the Earth's geologic features.
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