Scottish Highlands in the Torridon Hills such as Liathach and Beinn Eighe in Wester Ross. These foundations are interspersed with many igneous intrusions of a more recent age, the remnants of which have formed mountain massifs such as the Cairngorms and the Cuillin of Skye. A significant exception to the above are the fossil-bearing beds of Old Red Sandstone found principally along the Moray Firth coast and partially down the Highland Boundary Fault. The Jurassic beds found in isolated locations on Skye and Applecross reflect the complex underlying geology. They are the original source of much North Sea oil. The Great Glen
Scottish island names now extinct Cumbric language. These are collectively known as the Brythonic languages. It is clear that whenever place names are recorded at an early date as having been transposed from a form of P-Celtic into Gaelic that this occurred prior to the transformation from "Old British" into modern Welsh. There are numerous Scottish place names with Brythonic roots although the number of island names involved is relatively small. The Pictish language offers considerable difficulties. It is a term used for the language(s) thought to have been spoken by the Picts, the people of northern and central Scotland in the Early