- GeoRef, Copyright 2004, American Geological Institute. Reference includes data from Bibliography and Index of Geology Exclusive of North America, Geological Society of America, Boulder, CO, United States
The results of K-Ar age determinations on seven specimens of pelitic Moine schists and gneisses from widely separated localities in the Scottish Highlands are reported. The ages range from 426-441 million years (with three of the seven 434 m.y.), thus indicating that the Moine series was regionally metamorphosed during the Silurian.