section D-D'

For much of the southern part of the Eriboll site, the immediate footwall to the Moine thrust is marked by a mylonite belt, up to 100m thick, commonly derived from Lewisian gneisses and Cambrian quartzites. The mylonites are carried on a distinct a distinct tectonic contact. At Church Crag the mylonites lie on Pipe Rock. These outcrops were cited by Lapworth (1883-4) in his seminal description of of mylonites. Further south again the footwall is Durness Formation carbonates. On the western slopes of Meall Bad a Mhartuin (NC 440564) the mylonites are in contact with a slice of non-mylonitic but thoroughly recrystallised Durness Formation carbonates. These have probably been incorporated by imbricate thrusts in the footwall breaching up into the emplaced mylonites. This style of thrust interaction, with lower ones cutting up and across earlier, higher level thrusts, is common throughout the Moine thrust belt.