The first edition of the Grampian Highlands regional guide was published in 1935, with subsequent editions being issued in 1948 and 1966. Throughout the period since the appearance of the third edition there has been a considerable amount of work in the Grampian Highlands region (which here is taken to include the South-west Highlands), both systematic mapping by the British Geological Survey and research by the universities. The result of this work has been substantial improvement to our understanding of the geology. Even now, however, that understanding is incomplete and there is still controversy over several issues of fundamental significance. The present edition of the guide presents a comprehensive summary of our existing knowledge and reviews the on-going debates, particularly those relating to the Precambrian geology.
The Grampian Highlands region covers a large area and understanding its complex geology calls for a wide variety of geological expertise. In consequence, this fourth edition of the guide is a cooperative product from the BGS Highlands and Islands Group, (including several former members of staff), and other parts of BGS.