|Everett, P A, Gillespie, M R and Tracey, E A. 2015. Provenance of building stones in four 'galley castles' in Argyll. British Geological Survey Internal Report, OR/15/053.|
This report describes the outcomes of a project to assess the character and provenance of decorative stones in four ‘galley castles’ in Argyll. This includes a comparative investigation with a number of potential sources of sandstone and metamorphic rocks in Argyll and the surrounding region, which could have been quarried in the past.