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Roderick Impey Murchison, Scottish geologist, 1870. Artist: Carlo PellegriniRoderick Impey Murchison, Scottish geologist, 1870. Murchison (1792-1871) investigated old rocks beneath the red sandstone
Roderick Impey Murchison, Scottish-born British geologist, c1860. Murchison (1792-1871) investigated old rocks beneath the red sandstone
Glacial Erratic block of Silurian grit perched on the younger Carboniferous limestone at Norber near Austwick in Yorkshire
Fossil of a crinoid lilyFossil of the crinoid lily Periechinocrinus, from the Silurian strata in England