Biography of Sir Roderick Impey Murchison (1792-1871)

Born in 1972 and died in 1871, British geologist who spent part of his life to science, particularly geology and stratigraphy; and characterized systems Silurian, Devonian and Permian of the geological calendar.

From a young age is attracted by life military; he enlisted in the army at the age of 15 and went to serve in the Spanish war of independence, after which he married and settled definitively in the English City of Durham.

At the age of 30, he showed a great interest in geology and especially stratigraphy. After a series of explorations and field work in the outcrops of rocks conglomerate in the South Wales area, Murchison published the book the Silurian (1839) system. In it, it defines the Silurian system based on its lithology and contained in fossils, so it turned out to be the first geologist paleontology can be used to characterize the divisions of the cronoestratigr√°fico calendar.

In many of his explorations, he was accompanied by Lyell and Sedgwick, of which Murchison later defined the Devonian system in the materials present in the southeast of the country with the latter. Also next to Sedgwick, he made an expedition to Russia in 1841, after which defined the Permian system on the basis of the outcrops in the area of Perm.

From the early 1840s Murchison starred in multiple geological disputes, especially those relating to the Silurian system. Also radically opposed Darwin's theory of evolution, and in 1855 he was appointed director-general of the Geological Survey.