B.J. Bluck replies: Many plates were shown in the paper by Bluck (2010, figs 2,3,4,5,7,) which illustrate quite clearly the stratigraphy and direction of younging of the rocks involved. These figures, not exhaustive, were taken from outcrops which span almost the entire length of the Highland Border Complex from Cowie, north of Stonehaven to Bute in the SW. As a sedimentologist I have disregarded ‘graded bedding’ in sheared quartzose sandstones of indeterminate origin and indifferently exposed, as a reliable way-up criterion (for example in the North Esk and elsewhere).

The pattern of stratigraphical evidence is shown in photographs...

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