Roderick Impey Murchison, Scottish-born British geologist, c1860. Murchison (1792-1871) investigated old rocks beneath the red sandstone. He defined the Silurian (1835), Permian (c1845), and in cooperation with Adam Sedgwick (1785-1873), the Devonian geological periods. Murchison became a Fellow of the Royal Society in 1826, President of the Royal Geographical Society in 1843 and was knighted in 1846. | |
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