page_title: Highland Boundary Fault
section_title: Discovery
hierarchical_section_title: Highland Boundary Fault / Discovery
caption_attribution_description: English: Map by George Barrow published in 1912 showing what became known as the Highland Boundary Fault
context_page_description: The Highland Boundary Fault is a major fault zone that traverses Scotland from Arran and Helensburgh on the west coast to Stonehaven in the east. It separates two different geological terranes which give rise to two distinct physiographic terrains: the Highlands and the Lowlands, and in most places it is recognisable as a change in topography. Where rivers cross the fault, they often pass through gorges, and the associated waterfalls can be a barrier to salmon migration.
  The fault is believed to have formed in conjunction with the Strathmore syncline to the south-east during the Acadian orogeny in a transpressive regime that caused the uplift of the Grampian block and a small sinistral movement on the Highland Boundary Fault.
context_section_description: One of the earliest and most prominent references to the Highland Boundary Fault was by George Barrow in 1912, ʻOn the Geology of Lower Dee-side and the Southern Highland Borderʼ, which highlights the nature of the rocks accompanying the Highland Border and describes the outlining mineral zones associated with metamorphism. In the same publication, Barrow also outlines the ʻHighland Faultʼ and the areas where he believes there are planes of overthrust. Barrowʼs description of the structural nature of the rocks along the Highland Border suggests that rocks along both ends of the fault plane are indistinguishable from one another, with no brecciation.
caption: Map published in 1912 by George Barrow[5] showing what became known as the Highland Boundary Fault
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