Editorial to the revised reprint

Abstract

Abstract This edition of the atlas is a reduced-size reprint of the original A3 atlas. That work, the most expensive publishing venture hitherto undertaken by the Society, has covered its costs, so the opportunity exists to produce this smaller sized version at a low cost. Inevitably in the time that has elapsed since the atlas was produced there have been some major publications that have impinged upon the map reconstructions. The decision was made, to enable the price to be kept as low as possible, that no amendments would be made to the maps or text for this edition, but that this editorial page could be used to draw the readers' attention to points where revision is needed. It is not possible in the limited space available to mention the large number of minor modifications needed to the maps, but an attempt has been made here to summarize some of the more significant changes required. Terranes. Controversy still exists about some of the terrane boundaries shown on the map, but the hypothesis of Terrane Tectonics has gained wide acceptance. Unresolved problems include the status of the Grampian Group - was it, as the map suggests, the basal part of the Dalradian Supergroup (in which case the Great Glen Fault is a terrane boundary) or was it the uppermost group of the Moine Supergroup (in which case the Great Glen Fault is simply a post-Moine fault)? At the southern end of the Dalradian outcrop similar problems concern the fossiliferous rocks that crop