Roderick Impey Murchison

(1792—1871) geologist and geographer

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A gentleman of private means who devoted much of his life to science, Murchison turned professional when he became director of the Geological Survey in 1855. His Silurian System (1839) was the first stratigraphic system defined by fossil content, rather than lithology. He helped clarify the Devonian System and, after a visit to Russia, the Permian.

Subjects: World History — Earth Sciences and Geography.

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