http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
This volume puts the Geological Conservation Review sites of south west England into their geological context. Details are given of the lavas, granites and associated rocks of Devon and Cornwall, which were formed throughout a major mountain-building episode, between 450-270 million years ago, and have shaped the economic growth of the region.