Fig. 4.

a the gabbro in the stratigraphic interval of UZ containing the well-developed troughs is characterised by the presence of abundant prismatic plagioclase grains that are elongated along [100]. These elongate grains form a lineation near the axes of the troughs. This example from Trough G shows the abundant elongate plagioclase lying within strongly modally graded layers that are truncated at a low angle by the outcrop surface. b In the planar, laterally extensive layered rocks immediately underlying the troughs, the elongate plagioclase forms a foliation. This view is looking vertically down on an exposed layering surface