Editing Old Red Sandstone (section)

=== Midland Valley of Scotland ===
The [[Central Lowlands|Midland Valley]] [[graben]] defined by the [[Highland Boundary Fault]] in the north and the [[Southern Uplands Fault]] in the south harbours not only a considerable amount of Old Red Sandstone sedimentary rocks but also igneous rocks of this age associated with extensive [[volcanism]]. There is a continuous outcrop along the Highland Boundary Fault from [[Stonehaven]] on the [[North Sea]] coast to [[Helensburgh]] and beyond to [[Isle of Arran|Arran]].  A more disconnected series of outcrops occur along the line of the Southern Uplands Fault from [[Edinburgh]] to [[Girvan]]. Old Red Sandstone often occurs in conjunction with conglomerate formations, one such noteworthy [[cliff]]side exposure being the [[Fowlsheugh Nature Reserve]], [[Kincardineshire]].