The Southern Uplands Fault (or occasionally
Southern Upland Fault) is a
fault in
Scotland that runs from
Girvan (or more specifically from the
Rhins of Galloway) to
Dunbar on the East coast. It marks the southern boundary of the Scottish
Midland Valley and the northern margin of the
Southern Uplands; indeed it is recognised as a boundary between these two
terranes. Both sinistral and dextral
strike-slip movement is recorded from parts of the fault as are down-north and down-south normal movements suggestive of a complex history.