The Silurian System

…embodied in the monumental work The Silurian System (1839). Following the establishment of the Silurian System, Murchison and Sedgwick founded the Devonian System, based on their research of the geology of southwestern England and the Rhineland. Murchison then went on an expedition to Russia and wrote, with others, The Geology…

…findings in his classic work, The Silurian System (1839), illustrating 656 fossils, most of which were defined as characteristic of Silurian time. In this way, the formal groundwork was laid for recognition of Silurian rocks elsewhere around the world.